external/bsd/libevent/dist/evrpc-internal.h

   1 /*      $NetBSD$        */
   2 /*
   3  * Copyright (c) 2006 Niels Provos <provos@citi.umich.edu>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 #ifndef _EVRPC_INTERNAL_H_
  29 #define _EVRPC_INTERNAL_H_
  30
  31 #include "http-internal.h"
  32
  33 struct evrpc;
  34
  35 #define EVRPC_URI_PREFIX "/.rpc."
  36
  37 struct evrpc_hook {
  38         TAILQ_ENTRY(evrpc_hook) (next);
  39
  40         /* returns -1; if the rpc should be aborted, is allowed to rewrite */
  41         int (*process)(struct evhttp_request *, struct evbuffer *, void *);
  42         void *process_arg;
  43 };
  44
  45 TAILQ_HEAD(evrpc_hook_list, evrpc_hook);
  46
  47 /*
  48  * this is shared between the base and the pool, so that we can reuse
  49  * the hook adding functions; we alias both evrpc_pool and evrpc_base
  50  * to this common structure.
  51  */
  52 struct _evrpc_hooks {
  53         /* hooks for processing outbound and inbound rpcs */
  54         struct evrpc_hook_list in_hooks;
  55         struct evrpc_hook_list out_hooks;
  56 };
  57
  58 #define input_hooks common.in_hooks
  59 #define output_hooks common.out_hooks
  60
  61 struct evrpc_base {
  62         struct _evrpc_hooks common;
  63
  64         /* the HTTP server under which we register our RPC calls */
  65         struct evhttp* http_server;
  66
  67         /* a list of all RPCs registered with us */
  68         TAILQ_HEAD(evrpc_list, evrpc) registered_rpcs;
  69 };
  70
  71 struct evrpc_req_generic;
  72 void evrpc_reqstate_free(struct evrpc_req_generic* rpc_state);
  73
  74 /* A pool for holding evhttp_connection objects */
  75 struct evrpc_pool {
  76         struct _evrpc_hooks common;
  77
  78         struct event_base *base;
  79
  80         struct evconq connections;
  81
  82         int timeout;
  83
  84         TAILQ_HEAD(evrpc_requestq, evrpc_request_wrapper) requests;
  85 };
  86
  87
  88 #endif /* _EVRPC_INTERNAL_H_ */