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I know we have talked about rewriting app_queue for Asterisk 1.6, but once I

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saw this, I couldn't help myself from changing it.  Previously, for *every*
device state change, app_queue would spawn a thread to handle it.  Now, the
device state callback just puts the state change in a queue and it gets
handled by a single state change processing thread.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@65298 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Russell Bryant
2007-05-21 06:56:21 +00:00
parent de27bce777
commit ff73bfb7e7
1 changed files with 64 additions and 13 deletions
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77
apps/app_queue.c
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@@ -533,14 +533,14 @@ static enum queue_member_status get_member_status(struct call_queue *q, int max_
}
struct statechange {
AST_LIST_ENTRY(statechange) entry;
int state;
char dev[0];
};
static void *changethread(void *data)
static void *handle_statechange(struct statechange *sc)
{
struct call_queue *q;
struct statechange *sc = data;
struct member *cur;
struct member_interface *curint;
char *loc;
@@ -618,26 +618,62 @@ static void *changethread(void *data)
return NULL;
}
static int statechange_queue(const char *dev, enum ast_device_state state, void *ign)
/*!
* \brief Data used by the device state thread
*/
static struct {
/*! Set to 1 to stop the thread */
unsigned int stop:1;
/*! The device state monitoring thread */
pthread_t thread;
/*! Lock for the state change queue */
ast_mutex_t lock;
/*! Condition for the state change queue */
ast_cond_t cond;
/*! Queue of state changes */
AST_LIST_HEAD_NOLOCK(, statechange) state_change_q;
} device_state = {
.thread = AST_PTHREADT_NULL,
};
static void *device_state_thread(void *data)
{
struct statechange *sc;
while (!device_state.stop) {
ast_mutex_lock(&device_state.lock);
while (!(sc = AST_LIST_REMOVE_HEAD(&device_state.state_change_q, entry)))
ast_cond_wait(&device_state.cond, &device_state.lock);
ast_mutex_unlock(&device_state.lock);
/* Check to see if we were woken up to see the request to stop */
if (device_state.stop)
return NULL;
handle_statechange(sc);
free(sc);
}
return NULL;
}
static int statechange_queue(const char *dev, enum ast_device_state state, void *data)
{
/* Avoid potential for deadlocks by spawning a new thread to handle
the event */
struct statechange *sc;
pthread_t t;
pthread_attr_t attr;
if (!(sc = ast_calloc(1, sizeof(*sc) + strlen(dev) + 1)))
return 0;
sc->state = state;
strcpy(sc->dev, dev);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
if (ast_pthread_create_background(&t, &attr, changethread, sc)) {
ast_log(LOG_WARNING, "Failed to create update thread!\n");
free(sc);
}
pthread_attr_destroy(&attr);
ast_mutex_lock(&device_state.lock);
AST_LIST_INSERT_TAIL(&device_state.state_change_q, sc, entry);
ast_cond_signal(&device_state.cond);
ast_mutex_unlock(&device_state.lock);
return 0;
}
@@ -4686,6 +4722,14 @@ static int unload_module(void)
{
int res;
if (device_state.thread != AST_PTHREADT_NULL) {
device_state.stop = 1;
ast_mutex_lock(&device_state.lock);
ast_cond_signal(&device_state.cond);
ast_mutex_unlock(&device_state.lock);
pthread_join(device_state.thread, NULL);
}
ast_cli_unregister_multiple(cli_queue, sizeof(cli_queue) / sizeof(struct ast_cli_entry));
res = ast_manager_unregister("QueueStatus");
res |= ast_manager_unregister("Queues");
@@ -4717,10 +4761,17 @@ static int unload_module(void)
static int load_module(void)
{
int res;
if(!reload_queues())
if (!reload_queues())
return AST_MODULE_LOAD_DECLINE;
if (queue_persistent_members)
reload_queue_members();
ast_mutex_init(&device_state.lock);
ast_cond_init(&device_state.cond, NULL);
ast_pthread_create(&device_state.thread, NULL, device_state_thread, NULL);
ast_cli_register_multiple(cli_queue, sizeof(cli_queue) / sizeof(struct ast_cli_entry));
res = ast_register_application(app, queue_exec, synopsis, descrip);
res |= ast_register_application(app_aqm, aqm_exec, app_aqm_synopsis, app_aqm_descrip);