service_runtime/nacl_desc_semaphore.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Service Runtime.  Semaphore Descriptor / Handle abstraction.
  34  */
  35
  36 #include "native_client/include/portability.h"
  37
  38 #include <stdlib.h>
  39
  40 #if NACL_WINDOWS
  41 # include "io.h"
  42 #endif
  43
  44 #include "native_client/service_runtime/internal_errno.h"
  45
  46 #include "native_client/service_runtime/nacl_config.h"
  47 #include "native_client/service_runtime/nacl_desc_base.h"
  48 #include "native_client/service_runtime/nacl_desc_mutex.h"
  49 #include "native_client/service_runtime/nacl_semaphore.h"
  50 #include "native_client/service_runtime/nacl_log.h"
  51
  52 #include "native_client/service_runtime/include/sys/errno.h"
  53 #include "native_client/service_runtime/include/sys/fcntl.h"
  54 #include "native_client/service_runtime/include/sys/mman.h"
  55
  56 #include "native_client/intermodule_comm/nacl_imc_c.h"
  57
  58 /*
  59  * This file contains the implementation for the NaClDescSemaphore subclass
  60  * of NaClDesc.
  61  *
  62  * NaClDescSemaphore is the subclass that wraps host-OS semaphore abstractions
  63  */
  64
  65 int NaClDescSemaphoreCtor(struct NaClDescSemaphore  *self, int value)
  66 {
  67   struct NaClDesc *basep = (struct NaClDesc *) self;
  68
  69   basep->vtbl = (struct NaClDescVtbl *) NULL;
  70   if (!NaClDescCtor(basep)) {
  71     return 0;
  72   }
  73   if (!NaClSemCtor(&self->sem, value)) {
  74     NaClDescDtor(basep);
  75     return 0;
  76   }
  77
  78   basep->vtbl = &kNaClDescSemaphoreVtbl;
  79   return 1;
  80 }
  81
  82 void NaClDescSemaphoreDtor(struct NaClDesc *vself)
  83 {
  84   struct NaClDescSemaphore *self = (struct NaClDescSemaphore *) vself;
  85
  86   NaClLog(4, "NaClDescSemaphoreDtor(0x%08"PRIxPTR").\n",
  87           (uintptr_t) vself);
  88   NaClSemDtor(&self->sem);
  89   vself->vtbl = (struct NaClDescVtbl *) NULL;
  90   NaClDescDtor(&self->base);
  91 }
  92
  93 int NaClDescSemaphoreClose(struct NaClDesc          *vself,
  94                            struct NaClDescEffector  *effp)
  95 {
  96   NaClDescUnref(vself);
  97   return 0;
  98 }
  99
 100 int NaClDescSemaphorePost(struct NaClDesc         *vself,
 101                           struct NaClDescEffector *effp)
 102 {
 103   struct NaClDescSemaphore *self = (struct NaClDescSemaphore *)vself;
 104
 105   NaClSyncStatus status = NaClSemPost(&self->sem);
 106   return -NaClXlateNaClSyncStatus(status);
 107 }
 108
 109 int NaClDescSemaphoreSemWait(struct NaClDesc          *vself,
 110                              struct NaClDescEffector  *effp)
 111 {
 112   struct NaClDescSemaphore *self = (struct NaClDescSemaphore *)vself;
 113
 114   NaClSyncStatus status = NaClSemWait(&self->sem);
 115   return -NaClXlateNaClSyncStatus(status);
 116 }
 117
 118 int NaClDescSemaphoreGetValue(struct NaClDesc         *vself,
 119                               struct NaClDescEffector *effp)
 120 {
 121   NaClLog(LOG_ERROR, "SemGetValue is not implemented yet\n");
 122   return -NACL_ABI_EINVAL;
 123   /*
 124    * TODO: sem_getvalue is not implemented on OSX.
 125    * Remove this syscall or implement it using semctl
 126    */
 127 #if 0
 128   struct NaClDescSemaphore *self = (struct NaClDescSemaphore *) vself;
 129   NaClSyncStatus status = NaClSemGetValue(&self->sem);
 130   return NaClXlateNaClSyncStatus(status);
 131 #endif
 132 }
 133
 134
 135 struct NaClDescVtbl const kNaClDescSemaphoreVtbl = {
 136   NaClDescSemaphoreDtor,
 137   NaClDescMapNotImplemented,
 138   NaClDescUnmapUnsafeNotImplemented,
 139   NaClDescUnmapNotImplemented,
 140   NaClDescReadNotImplemented,
 141   NaClDescWriteNotImplemented,
 142   NaClDescSeekNotImplemented,
 143   NaClDescIoctlNotImplemented,
 144   NaClDescFstatNotImplemented,
 145   NaClDescSemaphoreClose,
 146   NaClDescGetdentsNotImplemented,
 147   NACL_DESC_SEMAPHORE,
 148   NaClDescExternalizeSizeNotImplemented,
 149   NaClDescExternalizeNotImplemented,
 150   NaClDescLockNotImplemented,
 151   NaClDescTryLockNotImplemented,
 152   NaClDescUnlockNotImplemented,
 153   NaClDescWaitNotImplemented,
 154   NaClDescTimedWaitAbsNotImplemented,
 155   NaClDescSignalNotImplemented,
 156   NaClDescBroadcastNotImplemented,
 157   NaClDescSendMsgNotImplemented,
 158   NaClDescRecvMsgNotImplemented,
 159   NaClDescConnectAddrNotImplemented,
 160   NaClDescAcceptConnNotImplemented,
 161   NaClDescSemaphorePost,
 162   NaClDescSemaphoreSemWait,
 163   NaClDescSemaphoreGetValue,
 164 };
 165
 166 int NaClDescSemaphoreInternalize(struct NaClDesc           **baseptr,
 167                                  struct NaClDescXferState  *xfer)
 168 {
 169   NaClLog(LOG_ERROR, "NaClDescSemaphoreInternalize: not shared yet\n");
 170   return -NACL_ABI_EINVAL;
 171 }