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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 support.
*
* \author David M. Lee, II <dlee@digium.com>
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "app.h"
#include "asterisk/stasis_app.h"
#include "asterisk/stasis_channels.h"
/*!
* \brief Number of buckets for the channels container for app instances. Remember
* to keep it a prime number!
*/
#define APP_CHANNELS_BUCKETS 7
struct app {
/*! Callback function for this application. */
stasis_app_cb handler;
/*! Opaque data to hand to callback function. */
void *data;
/*! List of channel identifiers this app instance is interested in */
struct ao2_container *channels;
/*! Name of the Stasis application */
char name[];
};
static void app_dtor(void *obj)
{
struct app *app = obj;
ao2_cleanup(app->data);
app->data = NULL;
ao2_cleanup(app->channels);
app->channels = NULL;
}
struct app *app_create(const char *name, stasis_app_cb handler, void *data)
{
RAII_VAR(struct app *, app, NULL, ao2_cleanup);
size_t size;
ast_assert(name != NULL);
ast_assert(handler != NULL);
size = sizeof(*app) + strlen(name) + 1;
app = ao2_alloc_options(size, app_dtor, AO2_ALLOC_OPT_LOCK_MUTEX);
if (!app) {
return NULL;
}
strncpy(app->name, name, size - sizeof(*app));
app->handler = handler;
ao2_ref(data, +1);
app->data = data;
app->channels = ast_str_container_alloc(APP_CHANNELS_BUCKETS);
if (!app->channels) {
return NULL;
}
ao2_ref(app, +1);
return app;
}
int app_add_channel(struct app *app, const struct ast_channel *chan)
{
const char *uniqueid;
ast_assert(chan != NULL);
ast_assert(app != NULL);
uniqueid = ast_channel_uniqueid(chan);
if (!ast_str_container_add(app->channels, uniqueid)) {
return -1;
}
return 0;
}
void app_remove_channel(struct app* app, const struct ast_channel *chan)
{
ast_assert(chan != NULL);
ast_assert(app != NULL);
ao2_find(app->channels, ast_channel_uniqueid(chan), OBJ_KEY | OBJ_NODATA | OBJ_UNLINK);
}
/*!
* \brief Send a message to the given application.
* \param app App to send the message to.
* \param message Message to send.
*/
void app_send(struct app *app, struct ast_json *message)
{
app->handler(app->data, app->name, message);
}
void app_update(struct app *app, stasis_app_cb handler, void *data)
{
SCOPED_AO2LOCK(lock, app);
app->handler = handler;
ao2_cleanup(app->data);
ao2_ref(data, +1);
app->data = data;
}
const char *app_name(const struct app *app)
{
return app->name;
}
int app_is_watching_channel(struct app *app, const char *uniqueid)
{
RAII_VAR(char *, found, NULL, ao2_cleanup);
found = ao2_find(app->channels, uniqueid, OBJ_KEY);
return found != NULL;
}
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