Allow libconfdb to run standalone (without aisexec)

[openais.git] / lib / evt.c

/*
 * Copyright (c) 2004-2005 Mark Haverkamp
 * Copyright (c) 2004-2005 Open Source Development Lab
 *
 * All rights reserved.
 *
 * This software licensed under BSD license, the text of which follows:
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of the Open Source Developement Lab nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <ipc_evt.h>
#include <ais_util.h>
#include "../exec/totem.h"
#include <list.h>

static void evtHandleInstanceDestructor(void *instance);
static void chanHandleInstanceDestructor(void *instance);
static void eventHandleInstanceDestructor(void *instance);

/*
 * Versions of the SAF AIS specification supported by this library
 */
static SaVersionT supported_versions[] = {
        {'B', 0x01, 0x01}
};

static struct saVersionDatabase evt_version_database = {
        sizeof(supported_versions) / sizeof(SaVersionT),
        supported_versions
};

/*
 * Event instance data
 */
struct saHandleDatabase evt_instance_handle_db = {
        .handleCount    = 0,
        .handles                = 0,
        .mutex                  = PTHREAD_MUTEX_INITIALIZER,
        .handleInstanceDestructor       = evtHandleInstanceDestructor
};

/*
 * Channel instance data
 */
struct saHandleDatabase channel_handle_db = {
        .handleCount    = 0,
        .handles                = 0,
        .mutex                  = PTHREAD_MUTEX_INITIALIZER,
        .handleInstanceDestructor       = chanHandleInstanceDestructor
};

/*
 * Event instance data
 */
struct saHandleDatabase event_handle_db = {
        .handleCount    = 0,
        .handles                = 0,
        .mutex                  = PTHREAD_MUTEX_INITIALIZER,
        .handleInstanceDestructor       = eventHandleInstanceDestructor
};

struct res_overlay {
        mar_res_header_t header __attribute__((aligned(8)));
        char data[MESSAGE_SIZE_MAX];
};

struct handle_list {
        SaUint64T                       hl_handle;
        struct list_head        hl_entry;
};

/*
 * data required to support events for a given initialization
 *
 * ei_dispatch_fd:      fd used for getting callback data e.g. async event data
 * ei_response_fd:      fd used for everything else (i.e. evt sync api commands).
 * ei_callback:         callback function.
 * ei_version:          version sent to the evtInitialize call.
 * ei_node_id:          our node id.
 * ei_node_name:        our node name.
 * ei_dispatch_mutex:   mutex for dispatch fd.  This lock also ensures that
 *                      only one thread is using ei_dispatch_data.
 * ei_response_mutex:   mutex for response fd
 * ei_channel_list:             list of associated channels (struct handle_list)
 * ei_dispatch_data:    event buffer for evtDispatch
 * ei_finalize:         instance in finalize flag
 * ei_data_available:   Indicates that there is a pending event message though
 *                                              there may not be a poll event.  This can happen
 *                                              when we get a SA_AIS_ERR_TRY_AGAIN when asking for an
 *                                              event.
 *
 */
struct event_instance {
        int                                     ei_dispatch_fd;
        int                                     ei_response_fd;
        SaEvtCallbacksT                 ei_callback;
        SaVersionT                              ei_version;
        SaClmNodeIdT                    ei_node_id;
        SaNameT                                 ei_node_name;
        pthread_mutex_t                 ei_dispatch_mutex;
        pthread_mutex_t                 ei_response_mutex;
        struct list_head                ei_channel_list;
        struct res_overlay              ei_dispatch_data;
        unsigned int                    ei_finalize:1;
        unsigned int                    ei_data_available:1;
};


/*
 * Data associated with an opened channel
 *
 * eci_channel_name:            name of channel
 * eci_open_flags:                      channel open flags
 * eci_svr_channel_handle:      channel handle returned from server
 * eci_closing:                         channel in process of being closed
 * eci_mutex:                           channel mutex
 * eci_event_list:                      events associated with this 
 *                                                      channel (struct handle_list)
 * eci_hl:                                      pointer to event instance handle struct
 *                                                  for this channel.
 */
struct event_channel_instance {

        SaNameT                                 eci_channel_name;
        SaEvtChannelOpenFlagsT  eci_open_flags;
        uint32_t                                eci_svr_channel_handle;
        SaEvtHandleT                    eci_instance_handle;
        int                                             eci_closing;
        pthread_mutex_t                 eci_mutex;
        struct list_head                eci_event_list;
        struct handle_list              *eci_hl;
         
};

/*
 * Event data. 
 *
 * Store event data from saEvtEventAllocate function.
 * Store event data from received events.
 *
 * edi_channel_handle:  handle (local) of assocated channel
 * edi_patterns:                event patterns
 * edi_priority:                event priority
 * edi_retention_time:  event's retention time
 * edi_pub_name:                event's publisher name
 * edi_pub_node:                event's publisher node
 * edi_pub_time:                event's publish time
 * edi_event_id:                event's Id
 * edi_event_data:              event's data
 * edi_event_data_size: size of edi_event_data
 * edi_freeing:                 event is being freed
 * edi_mutex:                   event data mutex
 * edi_hl:                              pointer to channel's handle 
 *                                              struct for this event.
 * edi_ro:                              read only flag
 */
struct event_data_instance {
        SaEvtChannelHandleT             edi_channel_handle;
        SaEvtEventPatternArrayT edi_patterns;
        SaUint8T                                edi_priority;
        SaTimeT                                 edi_retention_time;
        SaNameT                                 edi_pub_name;
        SaClmNodeIdT                    edi_pub_node;
        SaTimeT                                 edi_pub_time;
        SaEvtEventIdT                   edi_event_id;
        void                                    *edi_event_data;
        SaSizeT                                 edi_event_data_size;
        int                                             edi_freeing;
        pthread_mutex_t                 edi_mutex;
        struct handle_list              *edi_hl;
        int                                     edi_ro;
};


#define min(a,b) ((a) < (b) ? (a) : (b))

static inline int is_valid_event_id(SaEvtEventIdT evt_id)
{
        if (evt_id > 1000) {
                return 1;
        } else {
                return 0;
        }
}

/*
 * Clean up function for an evt instance (saEvtInitialize) handle
 * Not to be confused with event data.
 */
static void evtHandleInstanceDestructor(void *instance)
{
        struct event_instance *evti = instance;
        struct event_channel_instance *eci;
        struct handle_list *hl;
        struct list_head *l, *nxt;
        uint64_t handle;
        SaAisErrorT error;

        /*
         * Free up any channel data 
         */
        for (l = evti->ei_channel_list.next; 
                                                                l != &evti->ei_channel_list; l = nxt) {
                nxt = l->next;

                hl = list_entry(l, struct handle_list, hl_entry);
                handle = hl->hl_handle;
                error = saHandleInstanceGet(&channel_handle_db, hl->hl_handle,
                        (void*)&eci);
                if (error != SA_AIS_OK) {
                        /*
                         * already gone
                         */
                        continue;
                }
                saHandleDestroy(&channel_handle_db, handle);
                saHandleInstancePut(&channel_handle_db, handle);
        }

        pthread_mutex_destroy(&evti->ei_dispatch_mutex);
        pthread_mutex_destroy(&evti->ei_response_mutex);
}

/*
 * Clean up function for an open channel handle
 */
static void chanHandleInstanceDestructor(void *instance)
{
        struct event_channel_instance *eci  = instance;
        struct list_head *l, *nxt;
        struct handle_list *hl;
        uint64_t handle;

        if (eci->eci_hl) {
                list_del(&eci->eci_hl->hl_entry);
                free(eci->eci_hl);
                eci->eci_hl = 0;
        }
        /*
         * Free up any channel associated events
         */
        for (l = eci->eci_event_list.next; l != &eci->eci_event_list; l = nxt) {
                nxt = l->next;
                hl = list_entry(l, struct handle_list, hl_entry);
                handle = hl->hl_handle;
                saEvtEventFree(handle);
        }

        pthread_mutex_destroy(&eci->eci_mutex);
}

/*
 * Clean up function for an event handle
 */
static void eventHandleInstanceDestructor(void *instance)
{
        struct event_data_instance *edi = instance;
        int i;

        if (edi->edi_hl) {
                list_del(&edi->edi_hl->hl_entry);
                free(edi->edi_hl);
                edi->edi_hl = 0;
        }
        if (edi->edi_patterns.patterns) {
                for (i = 0; i < edi->edi_patterns.patternsNumber; i++) {
                        free(edi->edi_patterns.patterns[i].pattern);
                }
                free(edi->edi_patterns.patterns);
        }
        if (edi->edi_event_data) {
                free(edi->edi_event_data);
        }

        pthread_mutex_destroy(&edi->edi_mutex);
}

static SaAisErrorT evt_recv_event(int fd, struct lib_event_data **msg)
{
        SaAisErrorT error;
        mar_res_header_t hdr;
        void *data;

        error = saRecvRetry(fd, &hdr, sizeof(hdr));
        if (error != SA_AIS_OK) {
                goto msg_out;
        }
        *msg = malloc(hdr.size);
        if (!*msg) {
                error = SA_AIS_ERR_LIBRARY;
                goto msg_out;
        }
        data = (void *)((unsigned long)*msg) + sizeof(hdr);
        memcpy(*msg, &hdr, sizeof(hdr));
        if (hdr.size > sizeof(hdr)) {
                error = saRecvRetry(fd, data, hdr.size - sizeof(hdr));
                if (error != SA_AIS_OK) {
                        goto msg_out;
                }
        }
msg_out:
        return error;
}

/* 
 * The saEvtInitialize() function initializes the Event Service for the 
 * invoking process. A user of the Event Service must invoke this function 
 * before it invokes any other function of the Event Service API. Each 
 * initialization returns a different callback handle that the process 
 * can use to communicate with that library instance.
 */

SaAisErrorT 
saEvtInitialize(
        SaEvtHandleT *evtHandle,
        const SaEvtCallbacksT *callbacks,
        SaVersionT *version)
{
        SaAisErrorT error = SA_AIS_OK;
        struct event_instance *evti;

        if (!version || !evtHandle) {
                error = SA_AIS_ERR_INVALID_PARAM;
                goto error_nofree;
        }
        /*
         * validate the requested version with what we support
         */
        error = saVersionVerify(&evt_version_database, version);
        if (error != SA_AIS_OK) {
                goto error_nofree;
        }

        /*
         * Allocate instance data, allocate unique handle for instance,
         * assign instance data to unique handle
         */
        error = saHandleCreate(&evt_instance_handle_db, sizeof(*evti), 
                        evtHandle);
        if (error != SA_AIS_OK) {
                goto error_nofree;
        }
        error = saHandleInstanceGet(&evt_instance_handle_db, *evtHandle,
                        (void*)&evti);
        if (error != SA_AIS_OK) {
                if (error == SA_AIS_ERR_BAD_HANDLE) {
                        error = SA_AIS_ERR_LIBRARY;
                }
                goto error_handle_free;
        }
        memset(evti, 0, sizeof(*evti));
        
        list_init(&evti->ei_channel_list);

        /*
         * Save the version so we can check with the event server
         * and see if it supports this version.
         */
        evti->ei_version = *version;

        /*
         * Set up communication with the event server
         */
        error = saServiceConnect(&evti->ei_response_fd,
                &evti->ei_dispatch_fd, EVT_SERVICE);
        if (error != SA_AIS_OK) {
                goto error_handle_put;
        }

        /*
         * The callback function is saved in the event instance for 
         * saEvtDispatch() to use.
         */
        if (callbacks) {
                memcpy(&evti->ei_callback, callbacks, 
                                sizeof(evti->ei_callback));
        }

        pthread_mutex_init(&evti->ei_dispatch_mutex, NULL);
        pthread_mutex_init(&evti->ei_response_mutex, NULL);
        saHandleInstancePut(&evt_instance_handle_db, *evtHandle);

        return SA_AIS_OK;

error_handle_put:
        saHandleInstancePut(&evt_instance_handle_db, *evtHandle);
error_handle_free:
        (void)saHandleDestroy(&evt_instance_handle_db, *evtHandle);
error_nofree:
        return error;
}

/*
 * The saEvtSelectionObjectGet() function returns the operating system 
 * handle selectionObject, associated with the handle evtHandle, allowing 
 * the invoking process to ascertain when callbacks are pending. This 
 * function allows a process to avoid repeated invoking saEvtDispatch() to 
 * see if there is a new event, thus, needlessly consuming CPU time. In a 
 * POSIX environment the system handle could be a file descriptor that is 
 * used with the poll() or select() system calls to detect incoming callbacks.
 */
SaAisErrorT
saEvtSelectionObjectGet(
        SaEvtHandleT evtHandle,
        SaSelectionObjectT *selectionObject)
{
        struct event_instance *evti;
        SaAisErrorT error;

        if (!selectionObject) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, evtHandle, 
                        (void *)&evti);

        if (error != SA_AIS_OK) {
                return error;
        }

        *selectionObject = evti->ei_dispatch_fd;

        saHandleInstancePut(&evt_instance_handle_db, evtHandle);

        return SA_AIS_OK;
}


/*
 * Alocate an event data structure and associated handle to be
 * used to supply event data to a call back function.
 */
static SaAisErrorT make_event(SaEvtEventHandleT *event_handle,
                                struct lib_event_data *evt)
{
        struct event_data_instance *edi;
        struct event_channel_instance *eci;
        mar_evt_event_pattern_t *pat;
        SaUint8T *str;
        SaAisErrorT error;
        struct handle_list *hl;
        int i;

        error = saHandleCreate(&event_handle_db, sizeof(*edi), 
                event_handle);
        if (error != SA_AIS_OK) {
                if (error == SA_AIS_ERR_NO_MEMORY) {
                        error = SA_AIS_ERR_LIBRARY;
                }
                        goto make_evt_done;
        }

        error = saHandleInstanceGet(&event_handle_db, *event_handle,
                                (void*)&edi);
        if (error != SA_AIS_OK) {
                        saHandleDestroy(&event_handle_db, *event_handle);
                        goto make_evt_done;
        }

        error = saHandleInstanceGet(&channel_handle_db, 
                        evt->led_lib_channel_handle,
                        (void*)&eci);
        if (error != SA_AIS_OK) {
                saHandleDestroy(&event_handle_db, *event_handle);
                goto make_evt_done_put;
        }

        pthread_mutex_init(&edi->edi_mutex, NULL);
        edi->edi_ro = 1;
        edi->edi_freeing = 0;
        edi->edi_channel_handle = evt->led_lib_channel_handle;
        edi->edi_priority = evt->led_priority;
        edi->edi_retention_time = evt->led_retention_time;
        edi->edi_pub_node = evt->led_publisher_node_id;
        edi->edi_pub_time = evt->led_publish_time;
        edi->edi_event_data_size = evt->led_user_data_size;
        edi->edi_event_id = evt->led_event_id;
        marshall_from_mar_name_t (&edi->edi_pub_name, &evt->led_publisher_name);

        if (edi->edi_event_data_size) {
                edi->edi_event_data = malloc(edi->edi_event_data_size);
                if (!edi->edi_event_data) {
                        saHandleDestroy(&event_handle_db, *event_handle);

                        /*
                         * saEvtDispatch doesn't return SA_AIS_ERR_NO_MEMORY
                         */
                        error = SA_AIS_ERR_LIBRARY;
                        goto make_evt_done_put2;
                }
                memcpy(edi->edi_event_data, 
                                evt->led_body + evt->led_user_data_offset,
                                edi->edi_event_data_size);
        }

        /*
         * Move the pattern bits into the SaEvtEventPatternArrayT
         */
        edi->edi_patterns.patternsNumber = evt->led_patterns_number;
        edi->edi_patterns.allocatedNumber = evt->led_patterns_number;
        edi->edi_patterns.patterns = malloc(sizeof(SaEvtEventPatternT) * 
                                        edi->edi_patterns.patternsNumber);
        if (!edi->edi_patterns.patterns) {
                /*
                 * The destructor will take care of freeing event data already
                 * allocated.
                 */
                edi->edi_patterns.patternsNumber = 0;
                saHandleDestroy(&event_handle_db, *event_handle);

                /*
                 * saEvtDispatch doesn't return SA_AIS_ERR_NO_MEMORY
                 */
                error = SA_AIS_ERR_LIBRARY;
                goto make_evt_done_put2;
        }
        memset(edi->edi_patterns.patterns, 0, sizeof(SaEvtEventPatternT) *
                                        edi->edi_patterns.patternsNumber);
        pat = (mar_evt_event_pattern_t *)evt->led_body;
        str = evt->led_body + sizeof(mar_evt_event_pattern_t) * 
                                                edi->edi_patterns.patternsNumber;
        for (i = 0; i < evt->led_patterns_number; i++) {
                edi->edi_patterns.patterns[i].patternSize = pat->pattern_size;
                edi->edi_patterns.patterns[i].allocatedSize = pat->pattern_size;
                edi->edi_patterns.patterns[i].pattern = malloc(pat->pattern_size);
                if (!edi->edi_patterns.patterns[i].pattern) {
            DPRINT (("make_event: couldn't alloc %llu bytes\n",
                                (unsigned long long)pat->pattern_size));
                        saHandleDestroy(&event_handle_db, *event_handle);
                        error =  SA_AIS_ERR_LIBRARY;
                        goto make_evt_done_put2;
                }
                memcpy(edi->edi_patterns.patterns[i].pattern,
                                str, pat->pattern_size);
                str += pat->pattern_size;
                pat++; 
        }

        hl = malloc(sizeof(*hl));
        if (!hl) {
                saHandleDestroy(&event_handle_db, *event_handle);
                error = SA_AIS_ERR_LIBRARY;
        } else {
                edi->edi_hl = hl;
                hl->hl_handle = *event_handle;
                list_init(&hl->hl_entry);
                list_add(&hl->hl_entry, &eci->eci_event_list);
        }

make_evt_done_put2:
        saHandleInstancePut (&channel_handle_db, evt->led_lib_channel_handle);

make_evt_done_put:
        saHandleInstancePut (&event_handle_db, *event_handle);

make_evt_done:
        return error;
}

/*
 * The saEvtDispatch() function invokes, in the context of the calling 
 * thread, one or all of the pending callbacks for the handle evtHandle.
 */
SaAisErrorT
saEvtDispatch(
        SaEvtHandleT evtHandle,
        SaDispatchFlagsT dispatchFlags)
{
        struct pollfd ufds;
        int timeout = -1;
        SaAisErrorT error;
        int dispatch_avail;
        struct event_instance *evti;
        SaEvtEventHandleT event_handle;
        SaEvtCallbacksT callbacks;
        int ignore_dispatch = 0;
        int cont = 1; /* always continue do loop except when set to 0 */
        int poll_fd;
        struct lib_event_data *evt = 0;
        struct res_evt_event_data res;

        if (dispatchFlags < SA_DISPATCH_ONE || 
                        dispatchFlags > SA_DISPATCH_BLOCKING) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, evtHandle,
                (void *)&evti);
        if (error != SA_AIS_OK) {
                return error;
        }

        /*
         * Timeout instantly for SA_DISPATCH_ALL
         */
        if (dispatchFlags == SA_DISPATCH_ALL || dispatchFlags == SA_DISPATCH_ONE) {
                timeout = 0;
        }

        do {
                poll_fd = evti->ei_dispatch_fd;

                ufds.fd = poll_fd;
                ufds.events = POLLIN;
                ufds.revents = 0;

                error = saPollRetry(&ufds, 1, timeout);
                if (error != SA_AIS_OK) {
                        goto dispatch_put;
                }

                pthread_mutex_lock(&evti->ei_dispatch_mutex);

                /*
                 * Handle has been finalized in another thread
                 */
                if (evti->ei_finalize == 1) {
                        error = SA_AIS_OK;
                        goto dispatch_unlock;
                }

                /*
                 * If we know that we have an event waiting, we can skip the
                 * polling and just ask for it.
                 */
                if (!evti->ei_data_available) {
                        /*
                         * Check the poll data in case the fd status has changed
                         * since taking the lock
                         */
                        error = saPollRetry(&ufds, 1, 0);
                        if (error != SA_AIS_OK) {
                                goto dispatch_unlock;
                        }

                        if ((ufds.revents & (POLLERR|POLLHUP|POLLNVAL)) != 0) {
                                error = SA_AIS_ERR_BAD_HANDLE;
                                goto dispatch_unlock;
                        }

                        dispatch_avail = ufds.revents & POLLIN;
                        if (dispatch_avail == 0 &&
                                        (dispatchFlags == SA_DISPATCH_ALL ||
                                         dispatchFlags == SA_DISPATCH_ONE)) {
                                pthread_mutex_unlock(&evti->ei_dispatch_mutex);
                                break; /* exit do while cont is 1 loop */
                        } else if (dispatch_avail == 0) {
                                pthread_mutex_unlock(&evti->ei_dispatch_mutex);
                                continue; /* next poll */
                        }

                        if (ufds.revents & POLLIN) {
                                error = saRecvRetry (evti->ei_dispatch_fd, &evti->ei_dispatch_data.header,
                                        sizeof (mar_res_header_t));

                                if (error != SA_AIS_OK) {
                                        goto dispatch_unlock;
                                }
                                if (evti->ei_dispatch_data.header.size > sizeof (mar_res_header_t)) {
                                        error = saRecvRetry (evti->ei_dispatch_fd, &evti->ei_dispatch_data.data,
                                                evti->ei_dispatch_data.header.size - sizeof (mar_res_header_t));
                                        if (error != SA_AIS_OK) {
                                                goto dispatch_unlock;
                                        }
                                }
                        } else {
                                pthread_mutex_unlock(&evti->ei_dispatch_mutex);
                                continue;
                        }
                } else {
                        /*
                         * We know that we have an event available from before.
                         * Fake up a header message and the switch statement will
                         * take care of the rest.
                         */
                        evti->ei_dispatch_data.header.id = MESSAGE_RES_EVT_AVAILABLE;
                }

                /*
                 * Make copy of callbacks, message data, unlock instance, 
                 * and call callback. A risk of this dispatch method is that 
                 * the callback routines may operate at the same time that 
                 * EvtFinalize has been called in another thread.
                 */
                memcpy(&callbacks, &evti->ei_callback, sizeof(evti->ei_callback));

                /*
                 * Dispatch incoming response
                 */
                switch (evti->ei_dispatch_data.header.id) {

                case MESSAGE_RES_EVT_AVAILABLE:
                        evti->ei_data_available = 0;
                        /*
                         * There are events available.  Send a request for one and then
                         * dispatch it.
                         */
                        res.evd_head.id = MESSAGE_REQ_EVT_EVENT_DATA;
                        res.evd_head.size = sizeof(res);
 
                        pthread_mutex_lock(&evti->ei_response_mutex);
                        error = saSendRetry(evti->ei_response_fd, &res, sizeof(res));
 
                        if (error != SA_AIS_OK) {
                                DPRINT (("MESSAGE_RES_EVT_AVAILABLE: send failed: %d\n", error));
                                pthread_mutex_unlock(&evti->ei_response_mutex);
                                        break;
                        }
                        error = evt_recv_event(evti->ei_response_fd, &evt);
                        pthread_mutex_unlock(&evti->ei_response_mutex);

                        if (error != SA_AIS_OK) {
                                DPRINT (("MESSAGE_RES_EVT_AVAILABLE: receive failed: %d\n", error));
                                break;
                        }
                        /*
                         * No data available.  This is OK, another thread may have
                         * grabbed it.
                         */
                        if (evt->led_head.error == SA_AIS_ERR_NOT_EXIST) {
                                error = SA_AIS_OK;
                                break;
                        }

                        if (evt->led_head.error != SA_AIS_OK) {
                                error = evt->led_head.error;

                                /*
                                 * If we get a try again response, we've lost the poll event
                                 * so we have a data available flag so that we know that there
                                 * really is an event waiting the next time dispatch gets
                                 * called.
                                 */
                                if (error == SA_AIS_ERR_TRY_AGAIN) {
                                        evti->ei_data_available = 1;
                                } else {
                                        DPRINT (("MESSAGE_RES_EVT_AVAILABLE: Error returned: %d\n", error));
                                }
                                break;
                        }

                        error = make_event(&event_handle, evt);
                        if (error != SA_AIS_OK) {
                                        break;
                        }

                        /*
                         * Only call if there was a function registered
                         */
                        if (callbacks.saEvtEventDeliverCallback) {
                                callbacks.saEvtEventDeliverCallback(evt->led_sub_id, 
                                                event_handle, evt->led_user_data_size);
                        }
                        break;

                case MESSAGE_RES_EVT_CHAN_OPEN_CALLBACK:
                {
                        struct res_evt_open_chan_async *resa = 
                                (struct res_evt_open_chan_async *)&evti->ei_dispatch_data;
                        struct event_channel_instance *eci;

                        /*
                         * Check for errors.  If there are none, then
                         * look up the local channel via the handle that we
                         * got from the callback request.  All we need to do 
                         * is place in the handle from the server side and then 
                         * we can call the callback.
                         */
                        error = resa->ica_head.error;
                        if (error == SA_AIS_OK) {
                                error = saHandleInstanceGet(&channel_handle_db, 
                                                resa->ica_c_handle, (void*)&eci);
                                if (error == SA_AIS_OK) {
                                        eci->eci_svr_channel_handle = resa->ica_channel_handle;
                                        saHandleInstancePut (&channel_handle_db, 
                                                        resa->ica_c_handle);
                                }
                        }

                        /*
                         * Only call if there was a function registered
                         */
                        if (callbacks.saEvtChannelOpenCallback) {
                                callbacks.saEvtChannelOpenCallback(resa->ica_invocation,
                                        resa->ica_c_handle, error);
                        }

                }
                        break;

                default:
                        DPRINT (("Dispatch: Bad message type 0x%x\n", evti->ei_dispatch_data.header.id));
                        error = SA_AIS_ERR_LIBRARY;     
                        goto dispatch_unlock;
                }

                pthread_mutex_unlock(&evti->ei_dispatch_mutex);

                /*
                 * If empty is zero it means the we got the 
                 * message from the queue and we are responsible
                 * for freeing it.
                 */
                if (evt) {
                        free(evt);
                        evt = 0;
                }

                /*
                 * Determine if more messages should be processed
                 */
                switch (dispatchFlags) {
                case SA_DISPATCH_ONE:
                        if (ignore_dispatch) {
                                ignore_dispatch = 0;
                        } else {
                                cont = 0;
                        }
                        break;
                case SA_DISPATCH_ALL:
                        if (ignore_dispatch) {
                                ignore_dispatch = 0;
                        }
                        break;
                case SA_DISPATCH_BLOCKING:
                        break;
                }
        } while (cont);

        goto dispatch_put;

dispatch_unlock:
        pthread_mutex_unlock(&evti->ei_dispatch_mutex);
dispatch_put:
        saHandleInstancePut(&evt_instance_handle_db, evtHandle);
        return error;
}

/*
 * The saEvtFinalize() function closes the association, represented by the 
 * evtHandle parameter, between the process and the Event Service. It may 
 * free up resources. 
 * This function cannot be invoked before the process has invoked the 
 * corresponding saEvtInitialize() function for the Event Service. After 
 * this function is invoked, the selection object is no longer valid. 
 * Moreover, the Event Service is unavailable for further use unless it is 
 * reinitialized using the saEvtInitialize() function.
 */
SaAisErrorT
saEvtFinalize(SaEvtHandleT evtHandle)
{
        struct event_instance *evti;
        SaAisErrorT error;

        error = saHandleInstanceGet(&evt_instance_handle_db, evtHandle, 
                        (void *)&evti);
        if (error != SA_AIS_OK) {
                return error;
        }

       pthread_mutex_lock(&evti->ei_response_mutex);

        /*
         * Another thread has already started finalizing
         */
        if (evti->ei_finalize) {
                pthread_mutex_unlock(&evti->ei_response_mutex);
                saHandleInstancePut(&evt_instance_handle_db, evtHandle);
                return SA_AIS_ERR_BAD_HANDLE;
        }

        evti->ei_finalize = 1;

        pthread_mutex_unlock(&evti->ei_response_mutex);

        saHandleDestroy(&evt_instance_handle_db, evtHandle);
        /*
         * Disconnect from the server
         */
    if (evti->ei_response_fd != -1) {
                shutdown(evti->ei_response_fd, 0);
                close(evti->ei_response_fd);
        }

        if (evti->ei_dispatch_fd != -1) {
                shutdown(evti->ei_dispatch_fd, 0);
                close(evti->ei_dispatch_fd);
        }
        saHandleInstancePut(&evt_instance_handle_db, evtHandle);

        return error;
}

/*
 * The saEvtChannelOpen() function creates a new event channel or open an 
 * existing channel. The saEvtChannelOpen() function is a blocking operation 
 * and returns a new event channel handle. An event channel may be opened 
 * multiple times by the same or different processes for publishing, and 
 * subscribing to, events. If a process opens an event channel multiple 
 * times, it is possible to receive the same event multiple times. However, 
 * a process shall never receive an event more than once on a particular 
 * event channel handle. If a process opens a channel twice and an event is 
 * matched on both open channels, the Event Service performs two 
 * callbacks -- one for each opened channel.
 */
SaAisErrorT 
saEvtChannelOpen(
        SaEvtHandleT evtHandle, 
        const SaNameT *channelName, 
        SaEvtChannelOpenFlagsT channelOpenFlags, 
        SaTimeT timeout,
        SaEvtChannelHandleT *channelHandle)
{
        struct event_instance *evti;
        struct req_evt_channel_open req;
        struct res_evt_channel_open res;
        struct event_channel_instance *eci;
        struct handle_list *hl;
        SaAisErrorT error;
        struct iovec iov;

        if (!channelHandle || !channelName) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        if ((channelOpenFlags & ~(SA_EVT_CHANNEL_CREATE|SA_EVT_CHANNEL_PUBLISHER|
                                        SA_EVT_CHANNEL_SUBSCRIBER)) != 0) {
                return SA_AIS_ERR_BAD_FLAGS;
        }

        if (timeout == 0) {
                return (SA_AIS_ERR_TIMEOUT);
        }
        error = saHandleInstanceGet(&evt_instance_handle_db, evtHandle,
                        (void*)&evti);
        
        if (error != SA_AIS_OK) {
                goto chan_open_done;
        }

        /*
         * create a handle for this open channel
         */
        error = saHandleCreate(&channel_handle_db, sizeof(*eci), 
                        channelHandle);
        if (error != SA_AIS_OK) {
                goto chan_open_put;
        }


        error = saHandleInstanceGet(&channel_handle_db, *channelHandle,
                                        (void*)&eci);
        if (error != SA_AIS_OK) {
                saHandleDestroy(&channel_handle_db, *channelHandle);
                goto chan_open_put;
        }

        list_init(&eci->eci_event_list);

        /*
         * Send the request to the server and wait for a response
         */
        req.ico_head.size = sizeof(req);
        req.ico_head.id = MESSAGE_REQ_EVT_OPEN_CHANNEL;
        req.ico_c_handle = *channelHandle;
        req.ico_timeout = timeout;
        req.ico_open_flag = channelOpenFlags;
        marshall_to_mar_name_t (&req.ico_channel_name, (SaNameT *)channelName);

        iov.iov_base = (char *)&req;
        iov.iov_len = sizeof(req);

        pthread_mutex_lock(&evti->ei_response_mutex);

        error = saSendMsgReceiveReply(evti->ei_response_fd, &iov, 1,
                &res, sizeof(res));

        pthread_mutex_unlock (&evti->ei_response_mutex);

        if (error != SA_AIS_OK) {
                goto chan_open_free;
        }

        if (res.ico_head.id != MESSAGE_RES_EVT_OPEN_CHANNEL) {
                error = SA_AIS_ERR_LIBRARY;
                goto chan_open_free;
        }

        error = res.ico_head.error;
        if (error != SA_AIS_OK) {
                goto chan_open_free;
        }

        eci->eci_svr_channel_handle = res.ico_channel_handle;
        eci->eci_channel_name = *channelName;
        eci->eci_open_flags = channelOpenFlags;
        eci->eci_instance_handle = evtHandle;
        eci->eci_closing = 0;
        hl = malloc(sizeof(*hl));
        if (!hl) {
                error = SA_AIS_ERR_NO_MEMORY;
                goto chan_open_free;
        }
        eci->eci_hl = hl;
        hl->hl_handle = *channelHandle;
        list_init(&hl->hl_entry);
        list_add(&hl->hl_entry, &evti->ei_channel_list);

        pthread_mutex_init(&eci->eci_mutex, NULL);
        saHandleInstancePut (&evt_instance_handle_db, evtHandle);
        saHandleInstancePut (&channel_handle_db, *channelHandle);

        return SA_AIS_OK;

chan_open_free:
        saHandleDestroy(&channel_handle_db, *channelHandle);
        saHandleInstancePut (&channel_handle_db, *channelHandle);
chan_open_put:
        saHandleInstancePut (&evt_instance_handle_db, evtHandle);
chan_open_done:
        return error;
}

/*
 * The saEvtChannelClose() function closes an event channel and frees 
 * resources allocated for that event channel in the invoking process. 
 */

SaAisErrorT 
saEvtChannelClose(SaEvtChannelHandleT channelHandle)
{
        SaAisErrorT error;
        struct event_instance *evti;
        struct event_channel_instance *eci;
        struct req_evt_channel_close req;
        struct res_evt_channel_close res;
        struct iovec iov;

        error = saHandleInstanceGet(&channel_handle_db, channelHandle,
                        (void*)&eci);
        if (error != SA_AIS_OK) {
                goto chan_close_done;
        }

        /*
         * get the evt handle for the fd
         */
        error = saHandleInstanceGet(&evt_instance_handle_db, 
                        eci->eci_instance_handle, (void*)&evti);
        if (error != SA_AIS_OK) {
                goto chan_close_put1;
        }

        /*
         * Make sure that the channel isn't being closed elsewhere
         */
        pthread_mutex_lock(&eci->eci_mutex);
        if (eci->eci_closing) {
                pthread_mutex_unlock(&eci->eci_mutex);
                saHandleInstancePut(&channel_handle_db, channelHandle);
                return SA_AIS_ERR_BAD_HANDLE;
        }
        eci->eci_closing = 1;
        pthread_mutex_unlock(&eci->eci_mutex);
        

        /*
         * Send the request to the server and wait for a response
         */
        req.icc_head.size = sizeof(req);
        req.icc_head.id = MESSAGE_REQ_EVT_CLOSE_CHANNEL;
        req.icc_channel_handle = eci->eci_svr_channel_handle;

        iov.iov_base = (char *)&req;
        iov.iov_len = sizeof (req);

        pthread_mutex_lock(&evti->ei_response_mutex);

        error = saSendMsgReceiveReply (evti->ei_response_fd, &iov, 1,
                &res, sizeof (res));

        pthread_mutex_unlock(&evti->ei_response_mutex);

        if (error != SA_AIS_OK) {
                eci->eci_closing = 0;
                goto chan_close_put2;
        }
        if (res.icc_head.id != MESSAGE_RES_EVT_CLOSE_CHANNEL) {
                error = SA_AIS_ERR_LIBRARY;
                eci->eci_closing = 0;
                goto chan_close_put2;
        }

        error = res.icc_head.error;
        if (error == SA_AIS_ERR_TRY_AGAIN) {
                pthread_mutex_lock(&eci->eci_mutex);
                eci->eci_closing = 0;
                pthread_mutex_unlock(&eci->eci_mutex);
                goto chan_close_put2;
        }

        saHandleInstancePut(&evt_instance_handle_db, 
                                        eci->eci_instance_handle);
        saHandleDestroy(&channel_handle_db, channelHandle);
        saHandleInstancePut(&channel_handle_db, channelHandle);

        return error;

chan_close_put2:
        saHandleInstancePut(&evt_instance_handle_db, 
                                        eci->eci_instance_handle);
chan_close_put1:
        saHandleInstancePut(&channel_handle_db, channelHandle);
chan_close_done:
        return error;
}

/*
 * The saEvtChannelOpenAsync() function creates a new event channel or open an 
 * existing channel. The saEvtChannelOpenAsync() function is a non-blocking 
 * operation. A new event channel handle is returned in the channel open
 * callback function (SaEvtChannelOpenCallbackT).
 */
SaAisErrorT
saEvtChannelOpenAsync(SaEvtHandleT evtHandle,
                       SaInvocationT invocation,
                       const SaNameT *channelName,
                       SaEvtChannelOpenFlagsT channelOpenFlags)
{
        struct event_instance *evti;
        struct req_evt_channel_open req;
        struct res_evt_channel_open res;
        struct event_channel_instance *eci;
        SaEvtChannelHandleT channel_handle;
        SaAisErrorT error;
        struct handle_list *hl;
        struct iovec iov;

        if (!channelName) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        if ((channelOpenFlags & ~(SA_EVT_CHANNEL_CREATE|SA_EVT_CHANNEL_PUBLISHER|
                                        SA_EVT_CHANNEL_SUBSCRIBER)) != 0) {
                return SA_AIS_ERR_BAD_FLAGS;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, evtHandle,
                        (void*)&evti);
        
        if (error != SA_AIS_OK) {
                goto chan_open_done;
        }

        /*
         * Make sure that an open channel callback has been 
         * registered before  allowing the open to continue.
         */
        if (!evti->ei_callback.saEvtChannelOpenCallback) {
                error = SA_AIS_ERR_INIT;
                goto chan_open_put;
        }

        /*
         * create a handle for this open channel
         */
        error = saHandleCreate(&channel_handle_db, sizeof(*eci), 
                        &channel_handle);
        if (error != SA_AIS_OK) {
                goto chan_open_put;
        }


        error = saHandleInstanceGet(&channel_handle_db, channel_handle,
                                        (void*)&eci);
        if (error != SA_AIS_OK) {
                saHandleDestroy(&channel_handle_db, channel_handle);
                goto chan_open_put;
        }

        list_init(&eci->eci_event_list);

        /*
         * Send the request to the server.  The response isn't the open channel,
         * just an ack.  The open channel will be returned when the channel open
         * callback is called.
         */
        req.ico_head.size = sizeof(req);
        req.ico_head.id = MESSAGE_REQ_EVT_OPEN_CHANNEL_ASYNC;
        req.ico_c_handle = channel_handle;
        req.ico_timeout = 0;
        req.ico_invocation = invocation;
        req.ico_open_flag = channelOpenFlags;
        marshall_to_mar_name_t (&req.ico_channel_name, (SaNameT *)channelName);
        iov.iov_base = (char *)&req;
        iov.iov_len = sizeof(req);


        pthread_mutex_lock(&evti->ei_response_mutex);

        error = saSendMsgReceiveReply (evti->ei_response_fd, &iov, 1,
                &res, sizeof (res));

        pthread_mutex_unlock(&evti->ei_response_mutex);

        if (error != SA_AIS_OK) {
                goto chan_open_free;
        }

        if (res.ico_head.id != MESSAGE_RES_EVT_OPEN_CHANNEL) {
                error = SA_AIS_ERR_LIBRARY;
                goto chan_open_free;
        }

        error = res.ico_head.error;
        if (error != SA_AIS_OK) {
                goto chan_open_free;
        }

        eci->eci_svr_channel_handle = 0; /* filled in by callback */
        eci->eci_channel_name = *channelName;
        eci->eci_open_flags = channelOpenFlags;
        eci->eci_instance_handle = evtHandle;
        eci->eci_closing = 0;
        list_init(&eci->eci_event_list);
        hl = malloc(sizeof(*hl));
        if (!hl) {
                error = SA_AIS_ERR_NO_MEMORY;
                goto chan_open_free;
        }
        eci->eci_hl = hl;
        hl->hl_handle = channel_handle;
        list_init(&hl->hl_entry);
        list_add(&hl->hl_entry, &evti->ei_channel_list);

        pthread_mutex_init(&eci->eci_mutex, NULL);
        saHandleInstancePut (&evt_instance_handle_db, evtHandle);
        saHandleInstancePut (&channel_handle_db, channel_handle);

        return SA_AIS_OK;

chan_open_free:
        saHandleDestroy(&channel_handle_db, channel_handle);
        saHandleInstancePut (&channel_handle_db, channel_handle);
chan_open_put:
        saHandleInstancePut (&evt_instance_handle_db, evtHandle);
chan_open_done:
        return error;
}
/*
 *  The SaEvtChannelUnlink function deletes an existing event channel 
 *  from the cluster. 
 *
 *      After completion of the invocation: 
 *              - An open of the channel name without a create will fail.
 *              - The channel remains available to any already opened instances.
 *              - If an open/create is performed on this channel name a new instance
 *                is created.
 *              - The ulinked channel's resources will be deleted when the last open
 *                instance is closed.
 *                 
 *              Note that an event channel is only deleted from the cluster 
 *              namespace when saEvtChannelUnlink() is invoked on it. The deletion 
 *              of an event channel frees all resources allocated by the Event 
 *              Service for it, such as published events with non-zero retention 
 *              time.
 */
SaAisErrorT
saEvtChannelUnlink(
        SaEvtHandleT evtHandle,
        const SaNameT *channelName)
{
        struct event_instance *evti;
        struct req_evt_channel_unlink req;
        struct res_evt_channel_unlink res;
        struct iovec iov;
        SaAisErrorT error;

        if (!channelName) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, evtHandle,
                        (void*)&evti);
        
        if (error != SA_AIS_OK) {
                goto chan_unlink_done;
        }

        /*
         * Send the request to the server and wait for a response
         */
        req.iuc_head.size = sizeof(req);
        req.iuc_head.id = MESSAGE_REQ_EVT_UNLINK_CHANNEL;
        marshall_to_mar_name_t (&req.iuc_channel_name, (SaNameT *)channelName);
        iov.iov_base = (char *)&req;
        iov.iov_len = sizeof(req);


        pthread_mutex_lock(&evti->ei_response_mutex);

        error = saSendMsgReceiveReply (evti->ei_response_fd, &iov, 1,
                &res, sizeof (res));

        pthread_mutex_unlock(&evti->ei_response_mutex);

        if (error != SA_AIS_OK) {
                goto chan_unlink_put;
        }

        if (res.iuc_head.id != MESSAGE_RES_EVT_UNLINK_CHANNEL) {
                error = SA_AIS_ERR_LIBRARY;
                goto chan_unlink_put;
        }

        error = res.iuc_head.error;

chan_unlink_put:
        saHandleInstancePut (&evt_instance_handle_db, evtHandle);
chan_unlink_done:
        return error;
}

/* 
 * The saEvtEventAllocate() function allocates memory for the event, but not 
 * for the eventHandle, and initializes all event attributes to default values.
 * The event allocated by saEvtEventAllocate() is freed by invoking 
 * saEvtEventFree(). 
 * The memory associated with the eventHandle is not deallocated by the 
 * saEvtEventAllocate() function or the saEvtEventFree() function. It is the 
 * responsibility of the invoking process to deallocate the memory for the 
 * eventHandle when the process has published the event and has freed the 
 * event by invoking saEvtEventFree().
 */
SaAisErrorT 
saEvtEventAllocate(
        const SaEvtChannelHandleT channelHandle, 
        SaEvtEventHandleT *eventHandle)
{
        SaAisErrorT error;
        struct event_data_instance *edi;
        struct event_instance *evti;
        struct event_channel_instance *eci;
        struct handle_list *hl;

        if (!eventHandle) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        error = saHandleInstanceGet(&channel_handle_db, channelHandle,
                        (void*)&eci);
        if (error != SA_AIS_OK) {
                goto alloc_done;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, 
                        eci->eci_instance_handle, (void*)&evti);
        if (error != SA_AIS_OK) {
                goto alloc_put1;
        }

        error = saHandleCreate(&event_handle_db, sizeof(*edi), 
                        eventHandle);
        if (error != SA_AIS_OK) {
                goto alloc_put2;
        }
        error = saHandleInstanceGet(&event_handle_db, *eventHandle,
                                        (void*)&edi);
        if (error != SA_AIS_OK) {
                saHandleDestroy(&event_handle_db, *eventHandle);
                goto alloc_put2;
        }

        pthread_mutex_init(&edi->edi_mutex, NULL);
        edi->edi_ro = 0;
        edi->edi_freeing = 0;
        edi->edi_channel_handle = channelHandle;
        edi->edi_pub_node = evti->ei_node_id;
        edi->edi_priority = SA_EVT_LOWEST_PRIORITY;
        edi->edi_event_id = SA_EVT_EVENTID_NONE;
        edi->edi_pub_time = SA_TIME_UNKNOWN;
        edi->edi_retention_time = 0;
        hl = malloc(sizeof(*hl));
        if (!hl) {
                saHandleDestroy(&event_handle_db, *eventHandle);
                error = SA_AIS_ERR_NO_MEMORY;
                goto alloc_put2;
        }
        edi->edi_hl = hl;
        hl->hl_handle = *eventHandle;
        list_init(&hl->hl_entry);
        list_add(&hl->hl_entry, &eci->eci_event_list);


        saHandleInstancePut (&event_handle_db, *eventHandle);

alloc_put2:
        saHandleInstancePut (&evt_instance_handle_db, eci->eci_instance_handle);
alloc_put1:
        saHandleInstancePut (&channel_handle_db, channelHandle);
alloc_done:
        return error;
}

/*
 * The saEvtEventFree() function gives the Event Service premission to 
 * deallocate the memory that contains the attributes of the event that is 
 * associated with eventHandle. The function is used to free events allocated 
 * by saEvtEventAllocate() and by saEvtEventDeliverCallback().
 */
SaAisErrorT 
saEvtEventFree(SaEvtEventHandleT eventHandle)
{
        SaAisErrorT error;
        struct event_data_instance *edi;

        error = saHandleInstanceGet(&event_handle_db, eventHandle,
                        (void*)&edi);
        if (error != SA_AIS_OK) {
                goto evt_free_done;
        }

        /*
         * Make sure that the event isn't being freed elsewhere
         */
        pthread_mutex_lock(&edi->edi_mutex);
        if (edi->edi_freeing) {
                pthread_mutex_unlock(&edi->edi_mutex);
                saHandleInstancePut(&event_handle_db, eventHandle);
                return SA_AIS_ERR_BAD_HANDLE;
        }
        edi->edi_freeing = 1;

        pthread_mutex_unlock(&edi->edi_mutex);
        saHandleDestroy(&event_handle_db, eventHandle);
        saHandleInstancePut(&event_handle_db, eventHandle);

evt_free_done:
        return error;
}

/*
 * This function may be used to assign writeable event attributes. It takes 
 * as arguments an event handle eventHandle and the attribute to be set in 
 * the event structure of the event with that handle. Note: The only 
 * attributes that a process can set are the patternArray, priority, 
 * retentionTime and publisherName attributes.
 */
SaAisErrorT 
saEvtEventAttributesSet(
        const SaEvtEventHandleT eventHandle, 
        const SaEvtEventPatternArrayT *patternArray, 
        SaEvtEventPriorityT priority, 
        SaTimeT retentionTime, 
        const SaNameT *publisherName)
{
        SaEvtEventPatternT *oldpatterns;
        SaSizeT             oldnumber;
        SaAisErrorT error;
        struct event_data_instance *edi;
        int i;

        if (priority > SA_EVT_LOWEST_PRIORITY) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        error = saHandleInstanceGet(&event_handle_db, eventHandle,
                        (void*)&edi);
        if (error != SA_AIS_OK) {
                goto attr_set_done;
        }
        pthread_mutex_lock(&edi->edi_mutex);

        /*
         * Cannot modify an event returned via callback.
         */
        if (edi->edi_ro) {
                error = SA_AIS_ERR_ACCESS;
                goto attr_set_unlock;
        }

        edi->edi_priority = priority;
        edi->edi_retention_time = retentionTime;

        if (publisherName) {
                edi->edi_pub_name = *publisherName;
        }

        if (!patternArray) {
                goto attr_set_unlock;
        }

        oldpatterns = edi->edi_patterns.patterns;
        oldnumber = edi->edi_patterns.patternsNumber;
        edi->edi_patterns.patterns = 0;
        edi->edi_patterns.patterns = malloc(sizeof(SaEvtEventPatternT) * 
                                        patternArray->patternsNumber);
        if (!edi->edi_patterns.patterns) {
                error = SA_AIS_ERR_NO_MEMORY;
                goto attr_set_done_reset;
        }
        edi->edi_patterns.patternsNumber = patternArray->patternsNumber;
        edi->edi_patterns.allocatedNumber = patternArray->patternsNumber;

        /*
         * copy the patterns from the caller. allocating memory for
         * of all the strings.
         */
        for (i = 0; i < patternArray->patternsNumber; i++) {
                edi->edi_patterns.patterns[i].pattern = 
                        malloc(patternArray->patterns[i].patternSize);
                if (!edi->edi_patterns.patterns[i].pattern) {
                        int j;
                        for (j = 0; j < i; j++) {
                                free(edi->edi_patterns.patterns[j].pattern);
                        }
                        free(edi->edi_patterns.patterns);
                        error = SA_AIS_ERR_NO_MEMORY;
                        goto attr_set_done_reset;
                }
                memcpy(edi->edi_patterns.patterns[i].pattern,
                        patternArray->patterns[i].pattern,
                                patternArray->patterns[i].patternSize);
                edi->edi_patterns.patterns[i].patternSize = 
                        patternArray->patterns[i].patternSize;
                edi->edi_patterns.patterns[i].allocatedSize = 
                        patternArray->patterns[i].patternSize;
        }

        /*
         * free up the old pattern memory 
         */
        if (oldpatterns) {
                for (i = 0; i < oldnumber; i++) {
                        if (oldpatterns[i].pattern) {
                                free(oldpatterns[i].pattern);
                        }
                }
                free (oldpatterns);
        }
        goto attr_set_unlock;

attr_set_done_reset:
        edi->edi_patterns.patterns = oldpatterns;
        edi->edi_patterns.patternsNumber = oldnumber;
attr_set_unlock:
        pthread_mutex_unlock(&edi->edi_mutex);
        saHandleInstancePut(&event_handle_db, eventHandle);
attr_set_done:
        return error;
}

/* 
 * This function takes as parameters an event handle eventHandle and the 
 * attributes of the event with that handle. The function retrieves the 
 * value of the attributes for the event and stores them at the address 
 * provided for the out parameters. 
 * It is the responsibility of the invoking process to allocate memory for 
 * the out parameters before it invokes this function. The Event Service 
 * assigns the out values into that memory. For each of the out, or in/out, 
 * parameters, if the invoking process provides a NULL reference, the 
 * Availability Management Framework does not return the out value. 
 * Similarly, it is the responsibility of the invoking process to allocate 
 * memory for the patternArray.
 */
SaAisErrorT 
saEvtEventAttributesGet(
        SaEvtEventHandleT eventHandle, 
        SaEvtEventPatternArrayT *patternArray, 
        SaEvtEventPriorityT *priority, 
        SaTimeT *retentionTime, 
        SaNameT *publisherName, 
        SaTimeT *publishTime, 
        SaEvtEventIdT *eventId)
{
        SaAisErrorT error;
        struct event_data_instance *edi;
        SaSizeT npats;
        int i;

        error = saHandleInstanceGet(&event_handle_db, eventHandle,
                        (void*)&edi);
        if (error != SA_AIS_OK) {
                goto attr_get_done;
        }
        pthread_mutex_lock(&edi->edi_mutex);

        /*
         * Go through the args and send back information if the pointer
         * isn't NULL
         */
        if (eventId) {
                *eventId = edi->edi_event_id;
        }

        if (publishTime) {
                *publishTime = edi->edi_pub_time;
        }

        if (publisherName) {
                *publisherName = edi->edi_pub_name;
        }

        if (retentionTime) {
                *retentionTime = edi->edi_retention_time;
        }

        if (priority) {
                *priority = edi->edi_priority;
        }

        if (!patternArray) {
                goto attr_get_unlock;
        }

        /*
         * The spec says that if the called passes in a NULL patterns array,
         * then we allocate the required data and the caller is responsible
         * for dealocating later. Otherwise, we copy to pre-allocated space.
         * If there are more patterns than allcated space, we set the return
         * code to SA_AIS_ERR_NO_SPACE and copy as much as will fit. We will
         * return the total number of patterns available in the patternsNumber
         * regardless of how much was allocated.
         *
         */
        if (patternArray->patterns == NULL) {
                npats = edi->edi_patterns.patternsNumber;
                patternArray->allocatedNumber = edi->edi_patterns.patternsNumber;
                patternArray->patternsNumber = edi->edi_patterns.patternsNumber;
                patternArray->patterns = malloc(sizeof(*patternArray->patterns) * 
                                edi->edi_patterns.patternsNumber);
                if (!patternArray->patterns) {
                        error = SA_AIS_ERR_LIBRARY;
                        goto attr_get_unlock;
                }
                for (i = 0; i < edi->edi_patterns.patternsNumber; i++) {
                        patternArray->patterns[i].allocatedSize = 
                                edi->edi_patterns.patterns[i].allocatedSize;
                        patternArray->patterns[i].patternSize = 
                                edi->edi_patterns.patterns[i].patternSize;
                        patternArray->patterns[i].pattern = 
                                malloc(edi->edi_patterns.patterns[i].patternSize);
                        if (!patternArray->patterns[i].pattern) {
                                int j;
                                /*
                                 * back out previous mallocs
                                 */
                                for (j = 0; j < i; j++) {
                                        free(patternArray->patterns[j].pattern);
                                }
                                free(patternArray->patterns);

                                /*
                                 * saEvtEventAttributesGet doesn't return
                                 * SA_AIS_ERR_NO_MEMORY
                                 */
                                error = SA_AIS_ERR_LIBRARY;
                                goto attr_get_unlock;
                        }
                }
        } else {
                if (patternArray->allocatedNumber < edi->edi_patterns.allocatedNumber) {
                        error = SA_AIS_ERR_NO_SPACE;
                        npats = patternArray->allocatedNumber;
                } else {
                        npats = edi->edi_patterns.patternsNumber;
                }
        }
        patternArray->patternsNumber = edi->edi_patterns.patternsNumber;

        /*
         * copy the patterns to the callers structure.  If we have pre-allocated
         * data, the patterns may not fit in the supplied space. In that case we
         * return NO_SPACE.
         */
        for (i = 0; i < npats; i++) {

                memcpy(patternArray->patterns[i].pattern,
                        edi->edi_patterns.patterns[i].pattern,
                        min(patternArray->patterns[i].allocatedSize,
                                edi->edi_patterns.patterns[i].patternSize));

                if (patternArray->patterns[i].allocatedSize < 
                                                                edi->edi_patterns.patterns[i].patternSize) {
                        error = SA_AIS_ERR_NO_SPACE;
                }

                patternArray->patterns[i].patternSize = 
                        edi->edi_patterns.patterns[i].patternSize;
        }

attr_get_unlock:
        pthread_mutex_unlock(&edi->edi_mutex);
        saHandleInstancePut(&event_handle_db, eventHandle);
attr_get_done:
        return error;
}

/*
 * The saEvtEventDataGet() function allows a process to retrieve the data 
 * associated with an event previously delivered by 
 * saEvtEventDeliverCallback().
 */
SaAisErrorT 
saEvtEventDataGet(
        const SaEvtEventHandleT eventHandle, 
        void *eventData, 
        SaSizeT *eventDataSize)
{
        SaAisErrorT error = SA_AIS_ERR_INVALID_PARAM;
        struct event_data_instance *edi;
        SaSizeT xfsize;

        if (!eventDataSize) {
                goto data_get_done;
        }

        error = saHandleInstanceGet(&event_handle_db, eventHandle,
                        (void*)&edi);
        if (error != SA_AIS_OK) {
                goto data_get_done;
        }
        pthread_mutex_lock(&edi->edi_mutex);

        /*
         * If no buffer was supplied, then just tell the caller
         * how large a buffer is needed.  
         */
        if (!eventData) {
                error = SA_AIS_ERR_NO_SPACE;
                *eventDataSize = edi->edi_event_data_size;
                goto unlock_put;
        }

        /*
         * Can't get data from an event that wasn't 
         * a delivered event.
         */
        if (!edi->edi_ro) {
                error = SA_AIS_ERR_BAD_HANDLE;
                goto unlock_put;
        }

        if (edi->edi_event_data && edi->edi_event_data_size) {
                xfsize = min(*eventDataSize, edi->edi_event_data_size);
                if (*eventDataSize < edi->edi_event_data_size) {
                        error = SA_AIS_ERR_NO_SPACE;
                }
                *eventDataSize = edi->edi_event_data_size;
                memcpy(eventData, edi->edi_event_data, xfsize);
        } else {
                *eventDataSize = 0;
        }

unlock_put:
        pthread_mutex_unlock(&edi->edi_mutex);
        saHandleInstancePut(&event_handle_db, eventHandle);
data_get_done:
        return error;
}

/*
 * Calculate the size in bytes for patterns
 */
static size_t patt_size(const SaEvtEventPatternArrayT *patterns)
{
        int i;
        size_t size = sizeof(mar_evt_event_pattern_array_t);
        for (i = 0; i < patterns->patternsNumber; i++) {
                size += sizeof(mar_evt_event_pattern_t);
                size += patterns->patterns[i].patternSize;
        }
        return size;
}

/*
 * copy patterns to a form for sending to the server
 */
static uint32_t aispatt_to_evt_patt(
        const SaEvtEventPatternArrayT *patterns, 
                void *data)
{
        int i;
        mar_evt_event_pattern_t *pats = data;
        SaUint8T *str  = (SaUint8T *)pats + 
                                (patterns->patternsNumber * sizeof(*pats));

        /*
         * Pointers are replaced with offsets into the data array.  These
         * will be later converted back into pointers when received as events.
         */
        for (i = 0; i < patterns->patternsNumber; i++) {
                memcpy(str, patterns->patterns[i].pattern, 
                                patterns->patterns[i].patternSize);
                pats->pattern_size = patterns->patterns[i].patternSize;
                pats->pattern = (SaUint8T *)((void *)str - data);
                str += patterns->patterns[i].patternSize;
                pats++;
        }
        return patterns->patternsNumber;
}

/*
 * Calculate the size in bytes for filters
 */
static size_t filt_size(const SaEvtEventFilterArrayT *filters)
{
        int i;
        size_t size = sizeof(mar_evt_event_filter_array_t);

        for (i = 0; i < filters->filtersNumber; i++) {
                size += sizeof(mar_evt_event_filter_t);
                size += filters->filters[i].filter.patternSize;
        }
        return size;
}

/*
 * Convert the Sa filters to a form that can be sent over the network
 * i.e. replace pointers with offsets.  The pointers will be reconstituted
 * by the receiver.
 */
static uint32_t aisfilt_to_evt_filt(
        const SaEvtEventFilterArrayT *filters, 
        void *data)
{
        int i;
        mar_evt_event_filter_array_t *filtd = data;
        mar_evt_event_filter_t *filts = data + sizeof(mar_evt_event_filter_array_t);
        SaUint8T *str = (SaUint8T *)filts +
                        (filters->filtersNumber * sizeof(*filts));

        /*
         * Pointers are replaced with offsets into the data array.  These
         * will be later converted back into pointers by the evt server.
         */
        filtd->filters = (mar_evt_event_filter_t *)((void *)filts - data);
        filtd->filters_number = filters->filtersNumber;

        for (i = 0; i < filters->filtersNumber; i++) {
                filts->filter_type = filters->filters[i].filterType;
                filts->filter.pattern_size = 
                        filters->filters[i].filter.patternSize;
                memcpy(str,
                         filters->filters[i].filter.pattern, 
                         filters->filters[i].filter.patternSize);
                filts->filter.pattern = (SaUint8T *)((void *)str - data);
                str += filters->filters[i].filter.patternSize;
                filts++;
        }
        return filters->filtersNumber;
}

/*
 * The saEvtEventPublish() function publishes an event on the associated 
 * channel. The event to be published consists of a 
 * standard set of attributes (the event header) and an optional data part. 
 * Before an event can be published, the publisher process must invoke the 
 * saEvtEventPatternArraySet() function to set the event patterns. The event 
 * is delivered to subscribers whose subscription filter matches the event 
 * patterns. 
 * When the Event Service publishes an event, it automatically sets 
 * the following readonly event attributes: 
 *      - Event attribute time 
 *      - Event publisher identifier 
 *      - Event publisher node identifier
 *      - Event identifier 
 * In addition to the event attributes, a process can supply values for the 
 * eventData and eventDataSize parameters for publication as part of the 
 * event. The data portion of the event may be at most SA_EVT_DATA_MAX_LEN 
 * bytes in length. 
 * The process may assume that the invocation of saEvtEventPublish() copies 
 * all pertinent parameters, including the memory associated with the 
 * eventHandle and eventData parameters, to its own local memory. However, 
 * the invocation does not automatically deallocate memory associated with 
 * the eventHandle and eventData parameters. It is the responsibility of the 
 * invoking process to deallocate the memory for those parameters after 
 * saEvtEventPublish() returns.
 */
SaAisErrorT 
saEvtEventPublish(
        const SaEvtEventHandleT eventHandle, 
        const void *eventData, 
        SaSizeT eventDataSize,
        SaEvtEventIdT *eventId)
{
        SaAisErrorT error;
        struct event_data_instance *edi;
        struct event_instance *evti;
        struct event_channel_instance *eci;
        struct lib_event_data *req;
        struct res_evt_event_publish res;
        size_t pattern_size;
        struct event_pattern *patterns;
        void   *data_start;
        struct iovec iov;

        if (!eventId) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        if (eventDataSize > SA_EVT_DATA_MAX_LEN) {
                error = SA_AIS_ERR_TOO_BIG;
                goto pub_done;
        }

        error = saHandleInstanceGet(&event_handle_db, eventHandle,
                        (void*)&edi);
        if (error != SA_AIS_OK) {
                goto pub_done;
        }
        pthread_mutex_lock(&edi->edi_mutex);

        error = saHandleInstanceGet(&channel_handle_db, edi->edi_channel_handle,
                        (void*)&eci);
        if (error != SA_AIS_OK) {
                goto pub_put1;
        }

        /*
         * See if we can publish to this channel
         */
        if (!(eci->eci_open_flags & SA_EVT_CHANNEL_PUBLISHER)) {
                error = SA_AIS_ERR_ACCESS;
                goto pub_put2;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, 
                        eci->eci_instance_handle, (void*)&evti);
        if (error != SA_AIS_OK) {
                goto pub_put2;
        }

        /*
         * Figure out how much memory we need for the patterns and data
         */
        pattern_size = patt_size(&edi->edi_patterns);

        req = malloc(sizeof(*req) + eventDataSize + pattern_size);

        if (!req) {
                error = SA_AIS_ERR_NO_MEMORY;
                goto pub_put3;
        }

        patterns = (struct event_pattern *)req->led_body;
        data_start = (void *)req->led_body + pattern_size;

        /*
         * copy everything to the request structure
         */
        aispatt_to_evt_patt(&edi->edi_patterns, patterns);

        req->led_patterns_number = edi->edi_patterns.patternsNumber;

        req->led_user_data_offset = pattern_size;
        if (eventData && eventDataSize) {
                memcpy(data_start, eventData, eventDataSize);
                req->led_user_data_size = eventDataSize;
        } else {
                req->led_user_data_size = 0;
        }

        req->led_head.id = MESSAGE_REQ_EVT_PUBLISH;
        req->led_head.size = sizeof(*req) + pattern_size + eventDataSize;
        req->led_svr_channel_handle = eci->eci_svr_channel_handle;
        req->led_retention_time = edi->edi_retention_time;
        req->led_publish_time = clustTimeNow();
        req->led_priority = edi->edi_priority;
        marshall_to_mar_name_t (&req->led_publisher_name, &edi->edi_pub_name);

        iov.iov_base = (char *)req;
        iov.iov_len = req->led_head.size;

        pthread_mutex_lock(&evti->ei_response_mutex);

        error = saSendMsgReceiveReply(evti->ei_response_fd, &iov, 1, &res,
                sizeof(res));

        pthread_mutex_unlock (&evti->ei_response_mutex);
        free(req);
        if (error != SA_AIS_OK) {
                pthread_mutex_unlock (&evti->ei_response_mutex);
                goto pub_put3;
        }

        error = res.iep_head.error;
        if (error == SA_AIS_OK) {
                *eventId = res.iep_event_id;
        }

pub_put3:
        saHandleInstancePut (&evt_instance_handle_db, eci->eci_instance_handle);
pub_put2:
        saHandleInstancePut (&channel_handle_db, edi->edi_channel_handle);
pub_put1:
        pthread_mutex_unlock(&edi->edi_mutex);
        saHandleInstancePut(&event_handle_db, eventHandle);
pub_done:
        return error;
}

/*
 * The saEvtEventSubscribe() function enables a process to subscribe for 
 * events on an event channel by registering one or more filters on that 
 * event channel. The process must have opened the event channel, designated 
 * by channelHandle, with the SA_EVT_CHANNEL_SUBSCRIBER flag set for an 
 * invocation of this function to be successful. 
 * The memory associated with the filters is not deallocated by the 
 * saEvtEventSubscribe() function. It is the responsibility of the invoking 
 * process to deallocate the memory when the saEvtEventSubscribe() function 
 * returns. 
 * For a given subscription, the filters parameter cannot be modified. To 
 * change the filters parameter without losing events, a process must 
 * establish a new subscription with the new filters parameter. After the new 
 * subscription is established, the old subscription can be removed by 
 * invoking the saEvtEventUnsubscribe() function.
 */
SaAisErrorT 
saEvtEventSubscribe(
        const SaEvtChannelHandleT channelHandle, 
        const SaEvtEventFilterArrayT *filters, 
        SaEvtSubscriptionIdT subscriptionId)
{
        SaAisErrorT error;
        struct event_instance *evti;
        struct event_channel_instance *eci;
        struct req_evt_event_subscribe *req;
        struct res_evt_event_subscribe res;
        int     sz;
        struct iovec iov;

        if (!filters) {
                return SA_AIS_ERR_INVALID_PARAM;
        }
        error = saHandleInstanceGet(&channel_handle_db, channelHandle,
                        (void*)&eci);
        if (error != SA_AIS_OK) {
                goto subscribe_done;
        }

        /*
         * get the evt handle for the fd
         */
        error = saHandleInstanceGet(&evt_instance_handle_db, 
                        eci->eci_instance_handle, (void*)&evti);
        if (error != SA_AIS_OK) {
                goto subscribe_put1;
        }

        /*
         * Make sure that a deliver callback has been 
         * registered before allowing the subscribe to continue.
         */
        if (!evti->ei_callback.saEvtEventDeliverCallback) {
                error = SA_AIS_ERR_INIT;
                goto subscribe_put2;
        }

        /*
         * See if we can subscribe to this channel
         */
        if (!(eci->eci_open_flags & SA_EVT_CHANNEL_SUBSCRIBER)) {
                error = SA_AIS_ERR_ACCESS;
                goto subscribe_put2;
        }

        /*
         * calculate size needed to store the filters
         */
        sz = filt_size(filters);

        req = malloc(sizeof(*req) + sz);
        
        if (!req) {
                error = SA_AIS_ERR_NO_MEMORY;
                goto subscribe_put2;
        }

        /*
         * Copy the supplied filters to the request
         */
        req->ics_filter_count = aisfilt_to_evt_filt(filters, 
                req->ics_filter_data);
        req->ics_head.id = MESSAGE_REQ_EVT_SUBSCRIBE;
        req->ics_head.size = sizeof(*req) + sz;
        req->ics_channel_handle = eci->eci_svr_channel_handle;
        req->ics_sub_id = subscriptionId;
        req->ics_filter_size = sz;
        iov.iov_base = (char *)req;
        iov.iov_len = req->ics_head.size;

        pthread_mutex_lock(&evti->ei_response_mutex);
        error = saSendMsgReceiveReply(evti->ei_response_fd, &iov, 1,
                &res, sizeof(res));
        pthread_mutex_unlock (&evti->ei_response_mutex);
        free(req);

        if (res.ics_head.id != MESSAGE_RES_EVT_SUBSCRIBE) {
                goto subscribe_put2;
        }

        error = res.ics_head.error;

subscribe_put2:
        saHandleInstancePut(&evt_instance_handle_db, 
                                        eci->eci_instance_handle);
subscribe_put1:
        saHandleInstancePut(&channel_handle_db, channelHandle);
subscribe_done:
        return error;
}

/*
 * The saEvtEventUnsubscribe() function allows a process to stop receiving 
 * events for a particular subscription on an event channel by removing the 
 * subscription. The saEvtEventUnsubscribe() operation is successful if the 
 * subscriptionId parameter matches a previously registered subscription. 
 * Pending events that no longer match any subscription, because the 
 * saEvtEventUnsubscribe() operation had been invoked, are purged. a process 
 * that wishes to modify a subscription without losing any events must 
 * establish the new subscription before removing the existing subscription.
 */
SaAisErrorT 
saEvtEventUnsubscribe(
        const SaEvtChannelHandleT channelHandle, 
        SaEvtSubscriptionIdT subscriptionId)
{
        SaAisErrorT error;
        struct event_instance *evti;
        struct event_channel_instance *eci;
        struct req_evt_event_unsubscribe req;
        struct res_evt_event_unsubscribe res;
        struct iovec iov;

        error = saHandleInstanceGet(&channel_handle_db, channelHandle,
                        (void*)&eci);
        if (error != SA_AIS_OK) {
                goto unsubscribe_done;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, 
                        eci->eci_instance_handle, (void*)&evti);
        if (error != SA_AIS_OK) {
                goto unsubscribe_put1;
        }

        req.icu_head.id = MESSAGE_REQ_EVT_UNSUBSCRIBE;
        req.icu_head.size = sizeof(req);

        req.icu_channel_handle = eci->eci_svr_channel_handle;
        req.icu_sub_id = subscriptionId;
        iov.iov_base = (char *)&req;
        iov.iov_len = sizeof(req);

        pthread_mutex_lock(&evti->ei_response_mutex);
        error = saSendMsgReceiveReply(evti->ei_response_fd, &iov, 1,
                &res, sizeof(res));
        pthread_mutex_unlock (&evti->ei_response_mutex);

        if (error != SA_AIS_OK) {
                goto unsubscribe_put2;
        }

        if (res.icu_head.id != MESSAGE_RES_EVT_UNSUBSCRIBE) {
                error = SA_AIS_ERR_LIBRARY;
                goto unsubscribe_put2;
        }

        error = res.icu_head.error;

unsubscribe_put2:
        saHandleInstancePut(&evt_instance_handle_db, 
                                        eci->eci_instance_handle);
unsubscribe_put1:
        saHandleInstancePut(&channel_handle_db, channelHandle);
unsubscribe_done:
        return error;
}


/*
 * The saEvtEventRetentionTimeClear() function is used to clear the retention 
 * time of a published event. It indicates to the Event Service that it does 
 * not need to keep the event any longer for potential new subscribers. Once 
 * the value of the retention time is reset to 0, the event is no longer 
 * available for new subscribers. The event is held until all old subscribers 
 * in the system process the event and free the event using saEvtEventFree().
 */
SaAisErrorT 
saEvtEventRetentionTimeClear(
        const SaEvtChannelHandleT channelHandle, 
        const SaEvtEventIdT eventId)
{
        SaAisErrorT error;
        struct event_instance *evti;
        struct event_channel_instance *eci;
        struct req_evt_event_clear_retentiontime req;
        struct res_evt_event_clear_retentiontime res;
        struct iovec iov;

        if (!is_valid_event_id(eventId)) {
                return SA_AIS_ERR_INVALID_PARAM;
        }

        error = saHandleInstanceGet(&channel_handle_db, channelHandle,
                        (void*)&eci);
        if (error != SA_AIS_OK) {
                goto ret_time_done;
        }

        error = saHandleInstanceGet(&evt_instance_handle_db, 
                        eci->eci_instance_handle, (void*)&evti);
        if (error != SA_AIS_OK) {
                goto ret_time_put1;
        }

        req.iec_head.id = MESSAGE_REQ_EVT_CLEAR_RETENTIONTIME;
        req.iec_head.size = sizeof(req);

        req.iec_channel_handle = eci->eci_svr_channel_handle;
        req.iec_event_id = eventId;

        iov.iov_base = (char *)&req;
        iov.iov_len = sizeof(req);

        pthread_mutex_lock(&evti->ei_response_mutex);
        error = saSendMsgReceiveReply(evti->ei_response_fd, &iov, 1,
                &res, sizeof(res));
        pthread_mutex_unlock (&evti->ei_response_mutex);

        if (error != SA_AIS_OK) {
                goto ret_time_put2;
        }
        if (res.iec_head.id != MESSAGE_RES_EVT_CLEAR_RETENTIONTIME) {
                error = SA_AIS_ERR_LIBRARY;
                goto ret_time_put2;
        }

        error = res.iec_head.error;

ret_time_put2:
        saHandleInstancePut(&evt_instance_handle_db, 
                                        eci->eci_instance_handle);
ret_time_put1:
        saHandleInstancePut(&channel_handle_db, channelHandle);
ret_time_done:
        return error;
}

/*
 *      vi: set autoindent tabstop=4 shiftwidth=4 :
 */