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annotate src/thread/pth/SDL_sysmutex.c @ 1361:19418e4422cb

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New configure-based build system. Still work in progress, but much improved
author Sam Lantinga <slouken@libsdl.org>
date Thu, 16 Feb 2006 10:11:48 +0000
parents c71e05b4dc2e
children d910939febfa
rev   line source
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1 /*
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2 * GNU pth mutexes
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3 *
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4 * Patrice Mandin
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5 */
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6
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7 #include <pth.h>
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8
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9 #include "SDL_mutex.h"
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10 #include "SDL_sysmutex_c.h"
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11
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12 /* Create a mutex */
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13 SDL_mutex *SDL_CreateMutex(void)
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14 {
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15 SDL_mutex *mutex;
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16
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17 /* Allocate mutex memory */
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18 mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
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19 if ( mutex ) {
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20 /* Create the mutex, with initial value signaled */
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21 if (!pth_mutex_init(&(mutex->mutexpth_p))) {
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22 SDL_SetError("Couldn't create mutex");
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23 SDL_free(mutex);
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24 mutex = NULL;
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25 }
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26 } else {
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27 SDL_OutOfMemory();
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28 }
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29 return(mutex);
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30 }
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31
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32 /* Free the mutex */
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33 void SDL_DestroyMutex(SDL_mutex *mutex)
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34 {
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35 if ( mutex ) {
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36 SDL_free(mutex);
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37 }
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38 }
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39
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40 /* Lock the mutex */
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41 int SDL_mutexP(SDL_mutex *mutex)
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42 {
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43 if ( mutex == NULL ) {
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44 SDL_SetError("Passed a NULL mutex");
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45 return -1;
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46 }
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47
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48 pth_mutex_acquire(&(mutex->mutexpth_p), FALSE, NULL);
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49
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50 return(0);
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51 }
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52
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53 /* Unlock the mutex */
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54 int SDL_mutexV(SDL_mutex *mutex)
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55 {
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56 if ( mutex == NULL ) {
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57 SDL_SetError("Passed a NULL mutex");
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58 return -1;
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59 }
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60
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61 pth_mutex_release(&(mutex->mutexpth_p));
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62
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63 return(0);
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64 }