src/request.c

   1 /**************************************************************************/
   2 /* ---------------------------------------------------------------------- */
   3 /* Copyright (C) 2006 - 2008 FRESCOR consortium partners:                 */
   4 /*                                                                        */
   5 /*   Universidad de Cantabria,              SPAIN                         */
   6 /*   University of York,                    UK                            */
   7 /*   Scuola Superiore Sant'Anna,            ITALY                         */
   8 /*   Kaiserslautern University,             GERMANY                       */
   9 /*   Univ. Politécnica  Valencia,           SPAIN                        */
  10 /*   Czech Technical University in Prague,  CZECH REPUBLIC                */
  11 /*   ENEA                                   SWEDEN                        */
  12 /*   Thales Communication S.A.              FRANCE                        */
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  18 /*                                                                        */
  19 /*          FRESCOR project (FP6/2005/IST/5-034026) is funded             */
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  22 /*       made of this code.                                               */
  23 /*                                                                        */
  24 /*                                                                        */
  25 /*  This file is part of FORB (Frescor Object Request Broker)             */
  26 /*                                                                        */
  27 /* FORB is free software; you can redistribute it and/or modify it        */
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  39 /* instantiating FORB generics or templates, or linking other files       */
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  44 /* covered by the GNU Public License.                                     */
  45 /**************************************************************************/
  46
  47 /**
  48  * @file   request.c
  49  * @author Michal Sojka <sojkam1@fel.cvut.cz>
  50  * @date   Sun Oct 12 19:04:21 2008
  51  *
  52  * @brief  Implementation of request handling functions
  53  *
  54  *
  55  */
  56
  57 #include <forb/forb-internal.h>
  58 #include "request.h"
  59 #include <forb/iop-idl.h>
  60 #include <forb/object.h>
  61 #include "peer.h"
  62 #include "iop.h"
  63 #include "proto.h"
  64 #include <ul_log.h>
  65
  66 extern UL_LOG_CUST(ulogd_forb_request);
  67
  68 static inline int forb_request_cmp(const CORBA_unsigned_long *a,
  69                                    const CORBA_unsigned_long *b)
  70 {
  71         return (*a<*b) ? -1 :
  72                 ((*a>*b) ? +1 :
  73                  0);
  74 }
  75
  76 GAVL_CUST_NODE_INT_IMP(forb_request_nolock /* cust_prefix */,
  77                        forb_t /* cust_root_t */,
  78                        forb_request_t /* cust_item_t */,
  79                        CORBA_unsigned_long /* cust_key_t */,
  80                        requests /* cust_root_node */,
  81                        node /* cust_item_node */,
  82                        request_id /* cust_item_key */,
  83                        forb_request_cmp/* cust_cmp_fnc */);
  84
  85 /**
  86  * Initializes @a req structure for sending new request to object @a obj.
  87  *
  88  * @param req Request structure to initialize
  89  * @param obj Destination object
  90  *
  91  * @return Zero on success, FOSA error code on error.
  92  */
  93 int
  94 forb_request_init(forb_request_t *req, forb_object obj)
  95 {
  96         int ret = 0;
  97         forb_t *forb = forb_object_to_forb(obj);
  98         CORBA_boolean bret;
  99
 100         memset(req, 0, sizeof(*req));
 101         req->obj = obj;
 102
 103         fosa_mutex_lock(&forb->request_id_mutex);
 104         req->request_id = forb->request_id++;
 105         fosa_mutex_unlock(&forb->request_id_mutex);
 106
 107         FORB_CDR_codec_init_static(&req->cdr_request, obj->orb);
 108         bret = FORB_CDR_buffer_init(&req->cdr_request, 4096-8, forb_iop_MESSAGE_HEADER_SIZE);
 109         if (bret == CORBA_FALSE) {
 110                 return FOSA_ENOMEM;
 111         }
 112
 113         ret = forb_syncobj_init(&req->reply_ready, 0);
 114         return ret;
 115 }
 116
 117 void
 118 forb_request_destroy(forb_request_t *req)
 119 {
 120         forb_t *forb = forb_object_to_forb(req->obj);
 121
 122         forb_request_delete(forb, req);
 123         FORB_CDR_codec_release_buffer(&req->cdr_request);
 124         forb_syncobj_destroy(&req->reply_ready);
 125 }
 126
 127 void
 128 forb_request_signal_reply(forb_request_t *req)
 129 {
 130         forb_syncobj_signal(&req->reply_ready);
 131 }
 132
 133 void
 134 forb_request_wait_for_reply(forb_request_t *req)
 135 {
 136         fosa_abs_time_t timeout;
 137         int ret;
 138
 139         /* FIXME: What is the appropriate length for timeout? Maybe,
 140          * we can specify timeout in forb_env, but since it is
 141          * out-direction parameter, we cannot distinguish between
 142          * initialized and uninitialized env.timeout.  */
 143         fosa_clock_get_time(FOSA_CLOCK_ABSOLUTE, &timeout);
 144         timeout = fosa_abs_time_incr(timeout,
 145                                      fosa_msec_to_rel_time(10000));
 146
 147         ret = forb_syncobj_timedwait(&req->reply_ready, &timeout);
 148
 149         if (ret == ETIMEDOUT) {
 150                 req->env->major = FORB_EX_TIMEOUT;
 151         } else if (ret) {
 152                 req->env->major = FORB_EX_INTERNAL;
 153         }
 154 }
 155
 156 void
 157 forb_request_signal_processed(forb_request_t *req)
 158 {
 159         /* Signal, that we are done */
 160         forb_syncobj_signal(req->reply_processed);
 161 }
 162