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comparison src/thread/pth/SDL_sysmutex.c @ 329:1d74ddc90cb2

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Patrice's fixes for GNU Pthread support
author Sam Lantinga <slouken@libsdl.org>
date Mon, 01 Apr 2002 15:35:28 +0000
parents
children 3692456e7b0f
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328:dc21fa30faa9 329:1d74ddc90cb2
1 /*
2 * GNU pth mutexes
3 *
4 * Patrice Mandin
5 */
6
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <pth.h>
10
11 #include "SDL_error.h"
12 #include "SDL_mutex.h"
13 #include "SDL_sysmutex_c.h"
14
15 /* Create a mutex */
16 SDL_mutex *SDL_CreateMutex(void)
17 {
18 SDL_mutex *mutex;
19
20 /* Allocate mutex memory */
21 mutex = (SDL_mutex *)malloc(sizeof(*mutex));
22 if ( mutex ) {
23 /* Create the mutex, with initial value signaled */
24 if (!pth_mutex_init(&(mutex->mutexpth_p))) {
25 SDL_SetError("Couldn't create mutex");
26 free(mutex);
27 mutex = NULL;
28 }
29 } else {
30 SDL_OutOfMemory();
31 }
32 return(mutex);
33 }
34
35 /* Free the mutex */
36 void SDL_DestroyMutex(SDL_mutex *mutex)
37 {
38 if ( mutex ) {
39 free(mutex);
40 }
41 }
42
43 /* Lock the mutex */
44 int SDL_mutexP(SDL_mutex *mutex)
45 {
46 if ( mutex == NULL ) {
47 SDL_SetError("Passed a NULL mutex");
48 return -1;
49 }
50
51 pth_mutex_acquire(&(mutex->mutexpth_p), FALSE, NULL);
52
53 return(0);
54 }
55
56 /* Unlock the mutex */
57 int SDL_mutexV(SDL_mutex *mutex)
58 {
59 if ( mutex == NULL ) {
60 SDL_SetError("Passed a NULL mutex");
61 return -1;
62 }
63
64 pth_mutex_release(&(mutex->mutexpth_p));
65
66 return(0);
67 }