RetroArch/message_queue.h
2015-01-08 18:48:31 +01:00

86 lines
2.3 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2015 - Daniel De Matteis
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __RARCH_MSG_QUEUE_H
#define __RARCH_MSG_QUEUE_H
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct msg_queue msg_queue_t;
/**
* msg_queue_new:
* @size : maximum size of message
*
* Creates a message queue with maximum size different messages.
*
* Returns: NULL if allocation error, pointer to a message queue
* if successful. Has to be freed manually.
**/
msg_queue_t *msg_queue_new(size_t size);
/**
* msg_queue_push:
* @queue : pointer to queue object
* @msg : message to add to the queue
* @prio : priority level of the message
* @duration : how many times the message can be pulled
* before it vanishes (E.g. show a message for
* 3 seconds @ 60fps = 180 duration).
*
* Push a new message onto the queue.
**/
void msg_queue_push(msg_queue_t *queue, const char *msg,
unsigned prio, unsigned duration);
/**
* msg_queue_pull:
* @queue : pointer to queue object
*
* Pulls highest priority message in queue.
*
* Returns: NULL if no message in queue, otherwise a string
* containing the message.
**/
const char *msg_queue_pull(msg_queue_t *queue);
/**
* msg_queue_clear:
* @queue : pointer to queue object
*
* Clears out everything in the queue.
**/
void msg_queue_clear(msg_queue_t *queue);
/**
* msg_queue_free:
* @queue : pointer to queue object
*
* Frees message queue..
**/
void msg_queue_free(msg_queue_t *queue);
#ifdef __cplusplus
}
#endif
#endif