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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2013, Digium, Inc.
*
* David M. Lee, II <dlee@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Stasis application command support.
*
* \author David M. Lee, II <dlee@digium.com>
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "command.h"
#include "asterisk/lock.h"
#include "asterisk/stasis_app_impl.h"
struct stasis_app_command {
ast_mutex_t lock;
ast_cond_t condition;
stasis_app_command_cb callback;
void *data;
command_data_destructor_fn data_destructor;
int retval;
int is_done:1;
};
static void command_dtor(void *obj)
{
struct stasis_app_command *command = obj;
if (command->data_destructor) {
command->data_destructor(command->data);
}
ast_mutex_destroy(&command->lock);
ast_cond_destroy(&command->condition);
}
struct stasis_app_command *command_create(
stasis_app_command_cb callback, void *data, command_data_destructor_fn data_destructor)
{
struct stasis_app_command *command;
command = ao2_alloc(sizeof(*command), command_dtor);
if (!command) {
if (data_destructor) {
data_destructor(data);
}
return NULL;
}
ast_mutex_init(&command->lock);
ast_cond_init(&command->condition, 0);
command->callback = callback;
command->data = data;
command->data_destructor = data_destructor;
return command;
}
void command_complete(struct stasis_app_command *command, int retval)
{
ast_mutex_lock(&command->lock);
command->is_done = 1;
command->retval = retval;
ast_cond_signal(&command->condition);
ast_mutex_unlock(&command->lock);
}
int command_join(struct stasis_app_command *command)
{
int ret;
ast_mutex_lock(&command->lock);
while (!command->is_done) {
ast_cond_wait(&command->condition, &command->lock);
}
ret = command->retval;
ast_mutex_unlock(&command->lock);
return ret;
}
void command_invoke(struct stasis_app_command *command,
struct stasis_app_control *control, struct ast_channel *chan)
{
int retval = command->callback(control, chan, command->data);
if (command->data_destructor) {
command->data_destructor(command->data);
command->data_destructor = NULL;
}
command_complete(command, retval);
}
static void command_queue_prestart_destroy(void *obj)
{
/* Clean up the container */
ao2_cleanup(obj);
}
static const struct ast_datastore_info command_queue_prestart = {
.type = "stasis-command-prestart-queue",
.destroy = command_queue_prestart_destroy,
};
int command_prestart_queue_command(struct ast_channel *chan,
stasis_app_command_cb command_fn, void *data, command_data_destructor_fn data_destructor)
{
struct ast_datastore *datastore;
struct ao2_container *command_queue;
RAII_VAR(struct stasis_app_command *, command,
command_create(command_fn, data, data_destructor), ao2_cleanup);
if (!command) {
return -1;
}
datastore = ast_channel_datastore_find(chan, &command_queue_prestart, NULL);
if (datastore) {
command_queue = datastore->data;
ao2_link(command_queue, command);
return 0;
}
command_queue = ao2_container_alloc_list(AO2_ALLOC_OPT_LOCK_MUTEX, 0, NULL, NULL);
if (!command_queue) {
return -1;
}
datastore = ast_datastore_alloc(&command_queue_prestart, NULL);
if (!datastore) {
ao2_cleanup(command_queue);
return -1;
}
ast_channel_datastore_add(chan, datastore);
datastore->data = command_queue;
ao2_link(command_queue, command);
return 0;
}
struct ao2_container *command_prestart_get_container(struct ast_channel *chan)
{
struct ast_datastore *datastore = ast_channel_datastore_find(chan, &command_queue_prestart, NULL);
if (!datastore) {
return NULL;
}
return ao2_bump(datastore->data);
}
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