src/call_notifier.c

   1 /*
   2  * transsip - the telephony toolkit
   3  * By Daniel Borkmann <daniel@transsip.org>
   4  * Copyright 2011, 2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   5  * Swiss federal institute of technology (ETH Zurich)
   6  * Subject to the GPL, version 2.
   7  */
   8
   9 #include "notifier.h"
  10 #include "locking.h"
  11 #include "call_notifier.h"
  12
  13 static struct event_head call_notifier;
  14
  15 void init_call_notifier(void)
  16 {
  17         call_notifier.head = NULL;
  18         mutexlock_init(&call_notifier.lock);
  19 }
  20
  21 int register_call_notifier(struct event_block *block)
  22 {
  23         int ret;
  24
  25         mutexlock_lock(&call_notifier.lock);
  26         ret = register_event_hook(&call_notifier.head, block);
  27         mutexlock_unlock(&call_notifier.lock);
  28
  29         return ret;
  30 }
  31
  32 int register_call_notifier_once(struct event_block *block)
  33 {
  34         int ret;
  35
  36         mutexlock_lock(&call_notifier.lock);
  37         ret = register_event_hook_once(&call_notifier.head, block);
  38         mutexlock_unlock(&call_notifier.lock);
  39
  40         return ret;
  41 }
  42
  43 int unregister_call_notifier(struct event_block *block)
  44 {
  45         int ret;
  46
  47         mutexlock_lock(&call_notifier.lock);
  48         ret = unregister_event_hook(&call_notifier.head, block);
  49         mutexlock_unlock(&call_notifier.lock);
  50
  51         return ret;
  52 }
  53
  54 int call_notifier_exec(unsigned long event, const void *arg)
  55 {
  56         int ret;
  57
  58         mutexlock_lock(&call_notifier.lock);
  59         ret = call_event_hooks(&call_notifier.head, event, arg, NULL);
  60         mutexlock_unlock(&call_notifier.lock);
  61
  62         return ret;
  63 }