third_party/libevent/evrpc-internal.h

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