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/***
This file is part of PulseAudio.
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core.h>
#include <pulsecore/core-util.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include "message-handler.h"
/* Message handler functions */
/* Register message handler for the specified object. object_path must be a unique name starting with "/". */
void pa_message_handler_register(pa_core *c, const char *object_path, const char *description, pa_message_handler_cb_t cb, void *userdata) {
struct pa_message_handler *handler;
pa_assert(c);
pa_assert(object_path);
pa_assert(cb);
pa_assert(userdata);
/* Ensure that the object path is not empty and starts with "/". */
pa_assert(object_path[0] == '/');
handler = pa_xnew0(struct pa_message_handler, 1);
handler->userdata = userdata;
handler->callback = cb;
handler->object_path = pa_xstrdup(object_path);
handler->description = pa_xstrdup(description);
pa_assert_se(pa_hashmap_put(c->message_handlers, handler->object_path, handler) == 0);
}
/* Unregister a message handler */
void pa_message_handler_unregister(pa_core *c, const char *object_path) {
struct pa_message_handler *handler;
pa_assert(c);
pa_assert(object_path);
pa_assert_se(handler = pa_hashmap_remove(c->message_handlers, object_path));
pa_xfree(handler->object_path);
pa_xfree(handler->description);
pa_xfree(handler);
}
/* Send a message to an object identified by object_path */
int pa_message_handler_send_message(pa_core *c, const char *object_path, const char *message, const char *message_parameters, char **response) {
struct pa_message_handler *handler;
pa_assert(c);
pa_assert(object_path);
pa_assert(message);
pa_assert(response);
*response = NULL;
if (!(handler = pa_hashmap_get(c->message_handlers, object_path)))
return -PA_ERR_NOENTITY;
/* The handler is expected to return an error code and may also
return an error string in response */
return handler->callback(handler->object_path, message, message_parameters, response, handler->userdata);
}
/* Set handler description */
int pa_message_handler_set_description(pa_core *c, const char *object_path, const char *description) {
struct pa_message_handler *handler;
pa_assert(c);
pa_assert(object_path);
if (!(handler = pa_hashmap_get(c->message_handlers, object_path)))
return -PA_ERR_NOENTITY;
pa_xfree(handler->description);
handler->description = pa_xstrdup(description);
return PA_OK;
}
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