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annotate src/thread/dc/SDL_syssem.c @ 3097:0d12e8f1de3c

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Date: Thu, 05 Feb 2009 18:07:35 +0100 From: Stefan Klug Subject: [SDL] SDL 1.3 WinCE backend as promised, I've started to work on the WinCE backend of SDL 1.3 I've modified the win32 video backend and the gdi renderer, to work properly in WinCE. The results till now are great, but there is still some work to do. Attached are two patches with my changes. I would be happy if someone could review and propably commit them. The first one (configure.in.patch) should be straight forward without any side effects. The second one does the necessary changes to the win32 backend. I was really unhappy to start slicing this shiny new backend with #ifdef/#endif but I saw no other option. The most problematic issues are: - WinCe has no GetDIBits, so its practically impossible to fill a BITMAPINFO with correct values. I therefore removed the bmi member from the GDI_RenderData in SDL_gdirender.c to prevent usage of a not or not properly initialized bmi. - In SDL_win32window.c I exchanged some ASCII function by their general counterparts, (In CE only the Unicode versions are available). I don't know if this has a negative effect when running in win32 Cheers Stefan
author Sam Lantinga <slouken@libsdl.org>
date Mon, 23 Mar 2009 05:35:21 +0000
parents 99210400e8b9
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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 /* An implementation of semaphores using mutexes and condition variables */
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25
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26 #include "SDL_timer.h"
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27 #include "SDL_thread.h"
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28 #include "SDL_systhread_c.h"
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29
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30
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31 #if SDL_THREADS_DISABLED
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32
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33 SDL_sem *
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34 SDL_CreateSemaphore(Uint32 initial_value)
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35 {
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36 SDL_SetError("SDL not configured with thread support");
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37 return (SDL_sem *) 0;
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38 }
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39
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40 void
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41 SDL_DestroySemaphore(SDL_sem * sem)
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42 {
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43 return;
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44 }
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45
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46 int
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47 SDL_SemTryWait(SDL_sem * sem)
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48 {
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49 SDL_SetError("SDL not configured with thread support");
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50 return -1;
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51 }
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52
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53 int
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54 SDL_SemWaitTimeout(SDL_sem * sem, Uint32 timeout)
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55 {
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56 SDL_SetError("SDL not configured with thread support");
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57 return -1;
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58 }
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59
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60 int
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61 SDL_SemWait(SDL_sem * sem)
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62 {
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63 SDL_SetError("SDL not configured with thread support");
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64 return -1;
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65 }
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66
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67 Uint32
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68 SDL_SemValue(SDL_sem * sem)
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69 {
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70 return 0;
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71 }
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72
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73 int
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74 SDL_SemPost(SDL_sem * sem)
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75 {
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76 SDL_SetError("SDL not configured with thread support");
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77 return -1;
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78 }
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79
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80 #else
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81
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82 #include <kos/sem.h>
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83
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84 struct SDL_semaphore
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85 {
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86 semaphore_t sem;
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87 };
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88
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89 SDL_sem *
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90 SDL_CreateSemaphore(Uint32 initial_value)
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91 {
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92 return (SDL_sem *) sem_create(initial_value);
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93 }
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94
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95 /* WARNING:
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96 You cannot call this function when another thread is using the semaphore.
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97 */
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98 void
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99 SDL_DestroySemaphore(SDL_sem * sem)
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100 {
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101 if (!sem) {
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102 SDL_SetError("Passed a NULL semaphore");
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103 return;
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104 }
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105
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106 sem_destroy(&sem->sem);
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107 }
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108
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109 int
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110 SDL_SemTryWait(SDL_sem * sem)
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111 {
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112 int retval;
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113
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114 if (!sem) {
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115 SDL_SetError("Passed a NULL semaphore");
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116 return -1;
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117 }
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118
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119 retval = sem_trywait(&sem->sem);
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120 if (retval == 0)
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121 return 0;
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122 else
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123 return SDL_MUTEX_TIMEDOUT;
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124
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125 return retval;
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126 }
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127
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128 int
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129 SDL_SemWaitTimeout(SDL_sem * sem, Uint32 timeout)
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130 {
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131 int retval;
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132
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133 if (!sem) {
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134 SDL_SetError("Passed a NULL semaphore");
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135 return -1;
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136 }
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137
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138 /* A timeout of 0 is an easy case */
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139 if (timeout == 0) {
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140 return SDL_SemTryWait(sem);
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141 }
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142
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143 retval = sem_wait_timed(&sem->sem, timeout);
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144 if (retval == -1)
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145 retval = SDL_MUTEX_TIMEDOUT;
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146
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147 return retval;
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148 }
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149
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150 int
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151 SDL_SemWait(SDL_sem * sem)
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152 {
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153 if (!sem) {
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154 SDL_SetError("Passed a NULL semaphore");
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155 return -1;
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156 }
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157
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158 sem_wait(&sem->sem);
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159 return 0;
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160 }
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161
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162 Uint32
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163 SDL_SemValue(SDL_sem * sem)
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164 {
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165 if (!sem) {
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166 SDL_SetError("Passed a NULL semaphore");
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167 return -1;
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168 }
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169
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170 return sem_count(&sem->sem);
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171 }
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172
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173 int
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174 SDL_SemPost(SDL_sem * sem)
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175 {
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176 if (!sem) {
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177 SDL_SetError("Passed a NULL semaphore");
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178 return -1;
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179 }
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180
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181 sem_signal(&sem->sem);
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182 return 0;
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183 }
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184
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185 #endif /* SDL_THREADS_DISABLED */
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186 /* vi: set ts=4 sw=4 expandtab: */