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annotate src/thread/pth/SDL_sysmutex.c @ 3197:434ce3242e1c

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Alexei Tereschenko Why not to use hardware vertex processing instead of software one if it is available in D3D render driver? With hardware processing testsprite2 runs three times faster on all videocards which I could test.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 16 Jun 2009 14:34:15 +0000
parents 99210400e8b9
children
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /*
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25 * GNU pth mutexes
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26 *
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27 * Patrice Mandin
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28 */
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29
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30 #include <pth.h>
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31
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32 #include "SDL_mutex.h"
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33 #include "SDL_sysmutex_c.h"
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34
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35 /* Create a mutex */
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36 SDL_mutex *
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37 SDL_CreateMutex(void)
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38 {
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39 SDL_mutex *mutex;
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40
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41 /* Allocate mutex memory */
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42 mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex));
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43 if (mutex) {
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44 /* Create the mutex, with initial value signaled */
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45 if (!pth_mutex_init(&(mutex->mutexpth_p))) {
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46 SDL_SetError("Couldn't create mutex");
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47 SDL_free(mutex);
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48 mutex = NULL;
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49 }
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50 } else {
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51 SDL_OutOfMemory();
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52 }
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53 return (mutex);
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54 }
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55
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56 /* Free the mutex */
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57 void
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58 SDL_DestroyMutex(SDL_mutex * mutex)
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59 {
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60 if (mutex) {
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61 SDL_free(mutex);
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62 }
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63 }
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64
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65 /* Lock the mutex */
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66 int
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67 SDL_mutexP(SDL_mutex * mutex)
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68 {
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69 if (mutex == NULL) {
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70 SDL_SetError("Passed a NULL mutex");
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71 return -1;
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72 }
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73
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74 pth_mutex_acquire(&(mutex->mutexpth_p), FALSE, NULL);
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75
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76 return (0);
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77 }
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78
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79 /* Unlock the mutex */
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80 int
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81 SDL_mutexV(SDL_mutex * mutex)
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82 {
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83 if (mutex == NULL) {
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84 SDL_SetError("Passed a NULL mutex");
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85 return -1;
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86 }
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87
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88 pth_mutex_release(&(mutex->mutexpth_p));
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89
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90 return (0);
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91 }
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92
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93 /* vi: set ts=4 sw=4 expandtab: */