mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-16 23:37:11 +00:00
185 lines
4.3 KiB
C
185 lines
4.3 KiB
C
/* RetroArch - A frontend for libretro.
|
|
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
#include "boolean.h"
|
|
#include "message_queue.h"
|
|
#include "retroarch_logger.h"
|
|
#include "compat/posix_string.h"
|
|
|
|
struct queue_elem
|
|
{
|
|
unsigned duration;
|
|
unsigned prio;
|
|
char *msg;
|
|
};
|
|
|
|
struct msg_queue
|
|
{
|
|
struct queue_elem **elems;
|
|
size_t ptr;
|
|
size_t size;
|
|
char *tmp_msg;
|
|
};
|
|
|
|
msg_queue_t *msg_queue_new(size_t size)
|
|
{
|
|
msg_queue_t *queue = (msg_queue_t*)calloc(1, sizeof(*queue));
|
|
if (!queue)
|
|
return NULL;
|
|
|
|
queue->size = size + 1;
|
|
queue->elems = (struct queue_elem**)
|
|
calloc(queue->size,sizeof(struct queue_elem*));
|
|
|
|
if (!queue->elems)
|
|
{
|
|
free(queue);
|
|
return NULL;
|
|
}
|
|
queue->ptr = 1;
|
|
return queue;
|
|
}
|
|
|
|
void msg_queue_free(msg_queue_t *queue)
|
|
{
|
|
if (queue)
|
|
{
|
|
msg_queue_clear(queue);
|
|
free(queue->elems);
|
|
}
|
|
free(queue);
|
|
}
|
|
|
|
void msg_queue_push(msg_queue_t *queue, const char *msg,
|
|
unsigned prio, unsigned duration)
|
|
{
|
|
if (!queue || queue->ptr >= queue->size)
|
|
return;
|
|
|
|
struct queue_elem *new_elem = (struct queue_elem*)
|
|
calloc(1, sizeof(struct queue_elem));
|
|
if (!new_elem)
|
|
{
|
|
RARCH_ERR("New element allocation failed.\n");
|
|
return;
|
|
}
|
|
|
|
new_elem->prio = prio;
|
|
new_elem->duration = duration;
|
|
new_elem->msg = msg ? strdup(msg) : NULL;
|
|
|
|
queue->elems[queue->ptr] = new_elem;
|
|
size_t tmp_ptr = queue->ptr++;
|
|
|
|
while (tmp_ptr > 1)
|
|
{
|
|
struct queue_elem *parent = queue->elems[tmp_ptr >> 1];
|
|
struct queue_elem *child = queue->elems[tmp_ptr];
|
|
|
|
if (child->prio <= parent->prio)
|
|
break;
|
|
else
|
|
{
|
|
queue->elems[tmp_ptr >> 1] = child;
|
|
queue->elems[tmp_ptr] = parent;
|
|
}
|
|
tmp_ptr >>= 1;
|
|
}
|
|
}
|
|
|
|
void msg_queue_clear(msg_queue_t *queue)
|
|
{
|
|
if (!queue)
|
|
return;
|
|
|
|
size_t i;
|
|
for (i = 1; i < queue->ptr; i++)
|
|
{
|
|
if (queue->elems[i])
|
|
{
|
|
free(queue->elems[i]->msg);
|
|
free(queue->elems[i]);
|
|
queue->elems[i] = NULL;
|
|
}
|
|
}
|
|
queue->ptr = 1;
|
|
free(queue->tmp_msg);
|
|
queue->tmp_msg = NULL;
|
|
}
|
|
|
|
const char *msg_queue_pull(msg_queue_t *queue)
|
|
{
|
|
struct queue_elem *front = NULL, *last = NULL, *parent = NULL, *child = NULL;
|
|
size_t tmp_ptr = 1;
|
|
|
|
(void)parent;
|
|
(void)child;
|
|
(void)tmp_ptr;
|
|
|
|
/* Nothing in queue. */
|
|
if (!queue || queue->ptr == 1)
|
|
return NULL;
|
|
|
|
front = (struct queue_elem*)queue->elems[1];
|
|
front->duration--;
|
|
if (front->duration > 0)
|
|
return front->msg;
|
|
|
|
free(queue->tmp_msg);
|
|
queue->tmp_msg = front->msg;
|
|
front->msg = NULL;
|
|
|
|
front = (struct queue_elem*)queue->elems[1];
|
|
last = (struct queue_elem*)queue->elems[--queue->ptr];
|
|
queue->elems[1] = last;
|
|
free(front);
|
|
|
|
for (;;)
|
|
{
|
|
bool left = (tmp_ptr * 2 <= queue->ptr)
|
|
&& (queue->elems[tmp_ptr] < queue->elems[tmp_ptr * 2]);
|
|
bool right = (tmp_ptr * 2 + 1 <= queue->ptr)
|
|
&& (queue->elems[tmp_ptr] < queue->elems[tmp_ptr * 2 + 1]);
|
|
|
|
if (!left && !right)
|
|
break;
|
|
|
|
size_t switch_index = tmp_ptr;
|
|
if (left && !right)
|
|
switch_index <<= 1;
|
|
else if (right && !left)
|
|
switch_index += switch_index + 1;
|
|
else
|
|
{
|
|
if (queue->elems[tmp_ptr * 2]
|
|
>= queue->elems[tmp_ptr * 2 + 1])
|
|
switch_index <<= 1;
|
|
else
|
|
switch_index += switch_index + 1;
|
|
}
|
|
|
|
parent = (struct queue_elem*)queue->elems[tmp_ptr];
|
|
child = (struct queue_elem*)queue->elems[switch_index];
|
|
queue->elems[tmp_ptr] = child;
|
|
queue->elems[switch_index] = parent;
|
|
tmp_ptr = switch_index;
|
|
}
|
|
|
|
return queue->tmp_msg;
|
|
}
|