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annotate src/thread/pth/SDL_sysmutex.c @ 1125:a6011e1394d9

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Apparently MacOS X will sometimes pass command line arguments to a Cocoa app as an openFile() message, so we have to make sure we were launched from the Finder before accepting these as drag'n'drop documents, or they will just duplicate what's already in argc/argv.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 22 Aug 2005 14:18:15 +0000
parents 1d74ddc90cb2
children 3692456e7b0f
rev   line source
329
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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 <stdio.h>
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8 #include <stdlib.h>
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9 #include <pth.h>
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10
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11 #include "SDL_error.h"
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12 #include "SDL_mutex.h"
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13 #include "SDL_sysmutex_c.h"
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14
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15 /* Create a mutex */
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16 SDL_mutex *SDL_CreateMutex(void)
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17 {
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18 SDL_mutex *mutex;
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19
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20 /* Allocate mutex memory */
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21 mutex = (SDL_mutex *)malloc(sizeof(*mutex));
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22 if ( mutex ) {
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23 /* Create the mutex, with initial value signaled */
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24 if (!pth_mutex_init(&(mutex->mutexpth_p))) {
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25 SDL_SetError("Couldn't create mutex");
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26 free(mutex);
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27 mutex = NULL;
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28 }
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29 } else {
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30 SDL_OutOfMemory();
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31 }
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32 return(mutex);
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33 }
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34
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35 /* Free the mutex */
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36 void SDL_DestroyMutex(SDL_mutex *mutex)
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37 {
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38 if ( mutex ) {
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39 free(mutex);
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40 }
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41 }
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42
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43 /* Lock the mutex */
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44 int SDL_mutexP(SDL_mutex *mutex)
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45 {
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46 if ( mutex == NULL ) {
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47 SDL_SetError("Passed a NULL mutex");
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48 return -1;
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49 }
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50
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51 pth_mutex_acquire(&(mutex->mutexpth_p), FALSE, NULL);
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52
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53 return(0);
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54 }
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55
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56 /* Unlock the mutex */
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57 int SDL_mutexV(SDL_mutex *mutex)
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58 {
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59 if ( mutex == NULL ) {
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60 SDL_SetError("Passed a NULL mutex");
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61 return -1;
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62 }
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63
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64 pth_mutex_release(&(mutex->mutexpth_p));
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65
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66 return(0);
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67 }