liblttng-ust/ust-core.c

   1 /*
   2  * ust-core.c
   3  *
   4  * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; only
   9  * version 2.1 of the License.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <stdlib.h>
  22 #include <lttng/ust-events.h>
  23 #include <usterr-signal-safe.h>
  24
  25 static CDS_LIST_HEAD(lttng_transport_list);
  26
  27 struct lttng_transport *lttng_transport_find(const char *name)
  28 {
  29         struct lttng_transport *transport;
  30
  31         cds_list_for_each_entry(transport, &lttng_transport_list, node) {
  32                 if (!strcmp(transport->name, name))
  33                         return transport;
  34         }
  35         return NULL;
  36 }
  37
  38 /**
  39  * lttng_transport_register - LTT transport registration
  40  * @transport: transport structure
  41  *
  42  * Registers a transport which can be used as output to extract the data out of
  43  * LTTng. Called with ust_lock held.
  44  */
  45 void lttng_transport_register(struct lttng_transport *transport)
  46 {
  47         cds_list_add_tail(&transport->node, &lttng_transport_list);
  48 }
  49
  50 /**
  51  * lttng_transport_unregister - LTT transport unregistration
  52  * @transport: transport structure
  53  * Called with ust_lock held.
  54  */
  55 void lttng_transport_unregister(struct lttng_transport *transport)
  56 {
  57         cds_list_del(&transport->node);
  58 }