src/port.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                        */
  13 /*   Visual Tools S.A.                      SPAIN                         */
  14 /*   Rapita Systems Ltd                     UK                            */
  15 /*   Evidence                               ITALY                         */
  16 /*                                                                        */
  17 /*   See http://www.frescor.org for a link to partners' websites          */
  18 /*                                                                        */
  19 /*          FRESCOR project (FP6/2005/IST/5-034026) is funded             */
  20 /*       in part by the European Union Sixth Framework Programme          */
  21 /*       The European Union is not liable of any use that may be          */
  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        */
  28 /* under terms of the GNU General Public License as published by the      */
  29 /* Free Software Foundation; either version 2, or (at your option) any    */
  30 /* later version.  FORB is distributed in the hope that it will be        */
  31 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
  32 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
  33 /* General Public License for more details. You should have received a    */
  34 /* copy of the GNU General Public License along with FORB; see file       */
  35 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
  36 /* Cambridge, MA 02139, USA.                                              */
  37 /*                                                                        */
  38 /* As a special exception, including FORB header files in a file,         */
  39 /* instantiating FORB generics or templates, or linking other files       */
  40 /* with FORB objects to produce an executable application, does not       */
  41 /* by itself cause the resulting executable application to be covered     */
  42 /* by the GNU General Public License. This exception does not             */
  43 /* however invalidate any other reasons why the executable file might be  */
  44 /* covered by the GNU Public License.                                     */
  45 /**************************************************************************/
  46
  47 #include "port.h"
  48 #include "proto.h"
  49 #include <forb/config.h>
  50 #include "iop.h"
  51 #include <ul_log.h>
  52
  53 extern UL_LOG_CUST(ulogd_forb_port);
  54
  55 /**
  56  * Registers a new port in FORB and run receiver thread on it to
  57  * receive FORB messages through this prot.
  58  *
  59  * @param forb Where to register the new port.
  60  *
  61  * @param port Port to register. The memory for @a port should be
  62  * forb_malloced, since forb_free() is called on the port on destroy
  63  * operation.
  64  *
  65  * @return Zero on success, FOSA error code on error.
  66  */
  67 int forb_register_port(forb_t *forb, forb_port_t *port)
  68 {
  69         int ret;
  70
  71         port->forb = forb;
  72         port->finish = false;
  73
  74         fosa_mutex_lock(&forb->port_mutex);
  75         forb_port_insert(forb, port);
  76         fosa_mutex_unlock(&forb->port_mutex);
  77
  78         forb_syncobj_init(&port->hello, 0);
  79         forb_syncobj_init(&port->reply_processed, 0);
  80
  81         CDR_codec_init_static(&port->codec);
  82         if (!CDR_buffer_init(&port->codec, CONFIG_FORB_RECV_BUF_SIZE, 0)) {
  83                 ret = FOSA_ENOMEM;
  84                 goto err;
  85         }
  86         ret = fosa_thread_create(&port->receiver_thread, NULL,
  87                                  forb_iop_receiver_thread, port);
  88         if (ret != 0)
  89                 goto err2;
  90         ret = fosa_thread_create(&port->discovery_thread, NULL,
  91                                  forb_iop_discovery_thread, port);
  92         if (ret != 0)
  93                 goto err3;
  94         return 0;
  95 err3:
  96         port->finish = true;
  97         /* FIXME: This is Aquosa specific - cancelation should be
  98          * added to FOSA. */
  99         pthread_cancel(port->receiver_thread.pthread_id);
 100         pthread_cancel(port->discovery_thread.pthread_id);
 101
 102         pthread_join(port->receiver_thread.pthread_id, NULL);
 103         pthread_join(port->discovery_thread.pthread_id, NULL);
 104 err2:
 105         CDR_codec_release_buffer(&port->codec);
 106 err:
 107         fosa_mutex_lock(&forb->port_mutex);
 108         forb_port_delete(forb, port);
 109         fosa_mutex_unlock(&forb->port_mutex);
 110
 111         return ret;
 112 }
 113
 114 void forb_destroy_port(forb_port_t *port)
 115 {
 116         forb_t *forb = port->forb;
 117         void *thread_return;
 118
 119         port->finish = true;    /* Exit all the threads */
 120
 121         /* FIXME: There is no FOSA API for thread cancelation. */
 122         pthread_cancel(port->receiver_thread.pthread_id);
 123
 124         /* FIXME: Canceling discovery thread sometimes didn't
 125          * work. The discovery thread stayed forever in the
 126          * pthread_cond_timedwait(). */
 127         //pthread_cancel(port->discovery_thread.pthread_id);
 128
 129         /* Sometimes, cancelation doesn't work and the
 130          * discovery_thread hangs in pthread_cond_timedwait
 131          * infinitely. */
 132         forb_syncobj_signal(&port->hello);
 133
 134         pthread_join(port->receiver_thread.pthread_id, &thread_return);
 135         pthread_join(port->discovery_thread.pthread_id, &thread_return);
 136
 137         if (port->proto->port_destroy) {
 138                 port->proto->port_destroy(port);
 139         }
 140
 141         forb_peer_delete_by_port(forb, port);
 142
 143         CDR_codec_release_buffer(&port->codec);
 144
 145         fosa_mutex_lock(&forb->port_mutex);
 146         forb_port_delete(forb, port);
 147         fosa_mutex_unlock(&forb->port_mutex);
 148
 149         /* TODO: reference counting */
 150         forb_free(port);
 151 }