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annotate src/thread/pthread/SDL_syssem.c @ 3168:6338b7f2d024

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Hi, I have prepared a set of patches to readd WindowsCE support to SDL 1.3. I've created a new GAPI/Rawframebuffer and a DirectDraw renderer. Both renderers are work in progress and there are several unimplemented cases. (Notably RenderLine/RenderPoint/RenderFill/QueryTexturePixels/UpdateTexture and texture blending ) Nevertheless I am successfully using these renderers together with the SDL software renderer. (On most devices the SDL software renderer will be much faster as there are only badly optimized vendor drivers available) I send these patches now in this unpolished state because there seems to be some interest in win ce and someone has to start supporting SDL 1.3 Now on to the patches: wince_events_window_fixes.patch fixes some wince incompatibilities and adds fullscreen support via SHFullScreen. NOTE: This patch shouldn't have any side effects on Windows, but I have NOT tested it on Windows, so please double-check. This patch doesn't dependent on the following ones. wince_renderers_system.patch This patch does all necessary modifications to the SDL system. - it adds the renderers to the configure system - it adds the renderers to win32video SDL_ceddrawrender.c SDL_ceddrawrender.h SDL_gapirender_c.h SDL_gapirender.c SDL_gapirender.h these files add the new render drivers and should be placed in src/video/win32 Some notes to people who want to test this: - I have only compiled sdl with ming32ce, so the VisualC files are not up to date - As mingw32ce has no ddraw.h this file must be taken from the MS SDK and modified to work with gcc - I had to modify line 2611 in configure.in to EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lcoredll -lcommctrl -lmmtimer -Wl,--image-base -Wl,0x10000" otherwise GetCPinfo wouldn't link. If someone knows whats causing this I'd be happy to hear about it. It would be great if these patches could make their way into SVN as this would make collaboration much much easier. I'm out of office for the next week and therefore will be unavailable via email. Regards Stefan
author Sam Lantinga <slouken@libsdl.org>
date Sun, 07 Jun 2009 02:44:46 +0000
parents 99210400e8b9
children f7b03b6838cb
rev   line source
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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 #include <pthread.h>
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25 #include <semaphore.h>
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26
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27 #include "SDL_thread.h"
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28 #include "SDL_timer.h"
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29
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30 /* Wrapper around POSIX 1003.1b semaphores */
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31
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32 #if defined(__MACOSX__) || defined(__IPHONEOS__)
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33 /* Mac OS X doesn't support sem_getvalue() as of version 10.4 */
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34 #include "../generic/SDL_syssem.c"
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35 #else
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36
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37 struct SDL_semaphore
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38 {
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39 sem_t sem;
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40 };
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41
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42 /* Create a semaphore, initialized with value */
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43 SDL_sem *
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44 SDL_CreateSemaphore(Uint32 initial_value)
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45 {
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46 SDL_sem *sem = (SDL_sem *) SDL_malloc(sizeof(SDL_sem));
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47 if (sem) {
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48 if (sem_init(&sem->sem, 0, initial_value) < 0) {
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49 SDL_SetError("sem_init() failed");
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50 SDL_free(sem);
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51 sem = NULL;
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52 }
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53 } else {
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54 SDL_OutOfMemory();
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55 }
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56 return sem;
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57 }
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58
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59 void
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60 SDL_DestroySemaphore(SDL_sem * sem)
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61 {
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62 if (sem) {
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63 sem_destroy(&sem->sem);
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64 SDL_free(sem);
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65 }
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66 }
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67
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68 int
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69 SDL_SemTryWait(SDL_sem * sem)
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70 {
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71 int retval;
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72
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73 if (!sem) {
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74 SDL_SetError("Passed a NULL semaphore");
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75 return -1;
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76 }
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77 retval = SDL_MUTEX_TIMEDOUT;
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78 if (sem_trywait(&sem->sem) == 0) {
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79 retval = 0;
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80 }
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81 return retval;
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82 }
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83
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84 int
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85 SDL_SemWait(SDL_sem * sem)
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86 {
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87 int retval;
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88
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89 if (!sem) {
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90 SDL_SetError("Passed a NULL semaphore");
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91 return -1;
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92 }
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93
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94 retval = sem_wait(&sem->sem);
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95 if (retval < 0) {
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96 SDL_SetError("sem_wait() failed");
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97 }
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98 return retval;
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99 }
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100
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101 int
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102 SDL_SemWaitTimeout(SDL_sem * sem, Uint32 timeout)
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103 {
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104 int retval;
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105
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106 if (!sem) {
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107 SDL_SetError("Passed a NULL semaphore");
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108 return -1;
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109 }
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110
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111 /* Try the easy cases first */
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112 if (timeout == 0) {
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113 return SDL_SemTryWait(sem);
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114 }
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115 if (timeout == SDL_MUTEX_MAXWAIT) {
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116 return SDL_SemWait(sem);
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117 }
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118
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119 /* Ack! We have to busy wait... */
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120 /* FIXME: Use sem_timedwait()? */
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121 timeout += SDL_GetTicks();
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122 do {
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123 retval = SDL_SemTryWait(sem);
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124 if (retval == 0) {
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125 break;
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126 }
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127 SDL_Delay(1);
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128 } while (SDL_GetTicks() < timeout);
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129
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130 return retval;
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131 }
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132
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133 Uint32
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134 SDL_SemValue(SDL_sem * sem)
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135 {
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136 int ret = 0;
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137 if (sem) {
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138 sem_getvalue(&sem->sem, &ret);
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139 if (ret < 0) {
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140 ret = 0;
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141 }
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142 }
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143 return (Uint32) ret;
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144 }
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145
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146 int
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147 SDL_SemPost(SDL_sem * sem)
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148 {
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149 int retval;
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150
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151 if (!sem) {
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152 SDL_SetError("Passed a NULL semaphore");
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153 return -1;
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154 }
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155
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156 retval = sem_post(&sem->sem);
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157 if (retval < 0) {
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158 SDL_SetError("sem_post() failed");
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159 }
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160 return retval;
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161 }
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162
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163 #endif /* __MACOSX__ */
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164 /* vi: set ts=4 sw=4 expandtab: */