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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 control support.
*
* \author David M. Lee, II <dlee@digium.com>
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/stasis_channels.h"
#include "command.h"
#include "control.h"
struct stasis_app_control {
/*! Queue of commands to dispatch on the channel */
struct ao2_container *command_queue;
/*!
* When set, /c app_stasis should exit and continue in the dialplan.
*/
int is_done:1;
/*!
* The associated channel.
* Be very careful with the threading associated w/ manipulating
* the channel.
*/
struct ast_channel *channel;
};
struct stasis_app_control *control_create(struct ast_channel *channel)
{
struct stasis_app_control *control;
control = ao2_alloc(sizeof(*control), NULL);
if (!control) {
return NULL;
}
control->command_queue = ao2_container_alloc_list(
AO2_ALLOC_OPT_LOCK_MUTEX, 0, NULL, NULL);
control->channel = channel;
return control;
}
static struct stasis_app_command *exec_command(
struct stasis_app_control *control, stasis_app_command_cb command_fn,
void *data)
{
RAII_VAR(struct stasis_app_command *, command, NULL, ao2_cleanup);
command = command_create(command_fn, data);
if (!command) {
return NULL;
}
/* command_queue is a thread safe list; no lock needed */
ao2_link(control->command_queue, command);
ao2_ref(command, +1);
return command;
}
int control_is_done(struct stasis_app_control *control)
{
/* Called from stasis_app_exec thread; no lock needed */
return control->is_done;
}
static void *app_control_continue(struct stasis_app_control *control,
struct ast_channel *chan, void *data)
{
/* Called from stasis_app_exec thread; no lock needed */
control->is_done = 1;
return NULL;
}
void stasis_app_control_continue(struct stasis_app_control *control)
{
stasis_app_send_command_async(control, app_control_continue, NULL);
}
struct ast_channel_snapshot *stasis_app_control_get_snapshot(
const struct stasis_app_control *control)
{
RAII_VAR(struct stasis_message *, msg, NULL, ao2_cleanup);
struct stasis_caching_topic *caching_topic;
struct ast_channel_snapshot *snapshot;
caching_topic = ast_channel_topic_all_cached();
ast_assert(caching_topic != NULL);
msg = stasis_cache_get(caching_topic, ast_channel_snapshot_type(),
stasis_app_control_get_channel_id(control));
if (!msg) {
return NULL;
}
snapshot = stasis_message_data(msg);
ast_assert(snapshot != NULL);
ao2_ref(snapshot, +1);
return snapshot;
}
void *stasis_app_send_command(struct stasis_app_control *control,
stasis_app_command_cb command_fn, void *data)
{
RAII_VAR(struct stasis_app_command *, command, NULL, ao2_cleanup);
if (control == NULL) {
return NULL;
}
command = exec_command(control, command_fn, data);
if (!command) {
return NULL;
}
return command_join(command);
}
int stasis_app_send_command_async(struct stasis_app_control *control,
stasis_app_command_cb command_fn, void *data)
{
RAII_VAR(struct stasis_app_command *, command, NULL, ao2_cleanup);
if (control == NULL) {
return -1;
}
command = exec_command(control, command_fn, data);
if (!command) {
return -1;
}
return 0;
}
const char *stasis_app_control_get_channel_id(
const struct stasis_app_control *control)
{
return ast_channel_uniqueid(control->channel);
}
void stasis_app_control_publish(
struct stasis_app_control *control, struct stasis_message *message)
{
if (!control || !control->channel || !message) {
return;
}
stasis_publish(ast_channel_topic(control->channel), message);
}
int control_dispatch_all(struct stasis_app_control *control,
struct ast_channel *chan)
{
int count = 0;
struct ao2_iterator i;
void *obj;
ast_assert(control->channel == chan);
i = ao2_iterator_init(control->command_queue, AO2_ITERATOR_UNLINK);
while ((obj = ao2_iterator_next(&i))) {
RAII_VAR(struct stasis_app_command *, command, obj, ao2_cleanup);
command_invoke(command, control, chan);
++count;
}
ao2_iterator_destroy(&i);
return count;
}
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