Mercurial > sdl-ios-xcode
annotate src/thread/pthread/SDL_syscond.c @ 4134:31c7c57af8a4 SDL-1.2
Updates for building on Windows CE using mingw32ce cross compiler:
http://sourceforge.net/mailarchive/forum.php?thread_name 0703291652.38437.jwalt%40garni.ch&forum_name=cegcc-devel
Hi!
I just managed to compile SDL for Windows CE using the "mingw32ce"
configuration of http://cegcc.sourceforge.net. Test programs work as expected
(except for those using signals -- no POSIX on mingw32ce), and I didn't yet
encounter any problem.
While it was a pain to get everything compiled and running, the changes to
SDL are actually quite small (see attached SDL-ce.diff).
Unfortunately, the win32 headers shipped with cegcc are not 100% correct, and
it feels quite messy to work around them in SDL code, so those headers will
also need to be patched. (Attachment: win32api-ce.diff)
Since I had to apply the libtool patch from the cegcc patch, I have also ad ded
my copy of aclocal.m4 for SDL. I had to modify the cegcc libtool patch to
use "lt_cv_deplibs_check_method=pass_all" for mingw32ce, otherwise libtool
would not recognize the import libraries as valid for dynamic linking.
All these changes should not affect non-WinCE builds, so they could be
included in mainline SDL.
If you need some docs, you can use this description for a cross-compilation
README:
1) get cegcc from http://cegcc.sourceforge.net
2) build and install the "mingw32ce" variant (see cegcc installation docs)
3) patch w32api-headers (if not yet included in cegcc)
4) setup environment (customize the first three lines as you like):
PREFIX=/opt/mingw32ce
TARGET=arm-wince-mingw32ce
BUILD=`uname -m`-pc-linux-gnu
export PATH="$PREFIX/bin:$PREFIX/$TARGET/bin:$PREFIX/local/bin:$PATH"
export CFLAGS="${CFLAGS:- -O2 -g} -I$PREFIX/local/include"
export CPPFLAGS="${CPPFLAGS:- -O2 -g} -I$PREFIX/local/include"
export CXXFLAGS="${CXXFLAGS:- -O2 -g} -I$PREFIX/local/include"
export LDFLAGS="${LDFLAGS:- -O2 -g} -L$PREFIX/local/lib"
export HOST_CC="gcc"
export CC="$PREFIX/bin/$TARGET-gcc"
export CXX="$PREFIX/bin/$TARGET-g++"
export LD="$PREFIX/bin/$TARGET-ld"
export AS="$PREFIX/bin/$TARGET-as"
export AR="$PREFIX/bin/$TARGET-ar"
export RANLIB="$PREFIX/bin/$TARGET-ranlib"
export CONFIG_SHELL="/bin/sh"
5) build and install
./configure --target=$TARGET --host=$TARGET --build=$BUILD
make
make install
6) use (4) and (5) for any SDL-using software you want to cross-compile
7) copy $PREFIX/local/bin/SDL-1-2-0.dll into your executable directory on the WinCE machine
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 03 Jan 2008 06:19:07 +0000 |
parents | d910939febfa |
children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 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 <sys/time.h> |
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25 #include <unistd.h> |
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26 #include <errno.h> |
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27 #include <pthread.h> |
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28 |
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29 #include "SDL_thread.h" |
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30 #include "SDL_sysmutex_c.h" |
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31 |
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32 struct SDL_cond |
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33 { |
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34 pthread_cond_t cond; |
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35 }; |
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36 |
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37 /* Create a condition variable */ |
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38 SDL_cond * SDL_CreateCond(void) |
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39 { |
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40 SDL_cond *cond; |
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41 |
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42 cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond)); |
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43 if ( cond ) { |
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44 if ( pthread_cond_init(&cond->cond, NULL) < 0 ) { |
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45 SDL_SetError("pthread_cond_init() failed"); |
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46 SDL_free(cond); |
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47 cond = NULL; |
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48 } |
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49 } |
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50 return(cond); |
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51 } |
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52 |
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53 /* Destroy a condition variable */ |
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54 void SDL_DestroyCond(SDL_cond *cond) |
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55 { |
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56 if ( cond ) { |
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57 pthread_cond_destroy(&cond->cond); |
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58 SDL_free(cond); |
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59 } |
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60 } |
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61 |
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62 /* Restart one of the threads that are waiting on the condition variable */ |
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63 int SDL_CondSignal(SDL_cond *cond) |
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64 { |
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65 int retval; |
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66 |
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67 if ( ! cond ) { |
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68 SDL_SetError("Passed a NULL condition variable"); |
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69 return -1; |
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70 } |
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71 |
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72 retval = 0; |
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73 if ( pthread_cond_signal(&cond->cond) != 0 ) { |
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74 SDL_SetError("pthread_cond_signal() failed"); |
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75 retval = -1; |
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76 } |
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77 return retval; |
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78 } |
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79 |
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80 /* Restart all threads that are waiting on the condition variable */ |
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81 int SDL_CondBroadcast(SDL_cond *cond) |
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82 { |
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83 int retval; |
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84 |
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85 if ( ! cond ) { |
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86 SDL_SetError("Passed a NULL condition variable"); |
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87 return -1; |
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88 } |
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89 |
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90 retval = 0; |
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91 if ( pthread_cond_broadcast(&cond->cond) != 0 ) { |
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92 SDL_SetError("pthread_cond_broadcast() failed"); |
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93 retval = -1; |
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94 } |
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95 return retval; |
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96 } |
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97 |
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98 int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms) |
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99 { |
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100 int retval; |
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101 struct timeval delta; |
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102 struct timespec abstime; |
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103 |
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104 if ( ! cond ) { |
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105 SDL_SetError("Passed a NULL condition variable"); |
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106 return -1; |
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107 } |
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108 |
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109 gettimeofday(&delta, NULL); |
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110 |
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111 abstime.tv_sec = delta.tv_sec + (ms/1000); |
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112 abstime.tv_nsec = (delta.tv_usec + (ms%1000) * 1000) * 1000; |
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113 if ( abstime.tv_nsec > 1000000000 ) { |
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114 abstime.tv_sec += 1; |
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115 abstime.tv_nsec -= 1000000000; |
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116 } |
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117 |
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118 tryagain: |
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119 retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime); |
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120 switch (retval) { |
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121 case EINTR: |
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122 goto tryagain; |
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123 break; |
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124 case ETIMEDOUT: |
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125 retval = SDL_MUTEX_TIMEDOUT; |
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126 break; |
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127 case 0: |
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128 break; |
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129 default: |
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130 SDL_SetError("pthread_cond_timedwait() failed"); |
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131 retval = -1; |
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132 break; |
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133 } |
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134 return retval; |
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135 } |
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136 |
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137 /* Wait on the condition variable, unlocking the provided mutex. |
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138 The mutex must be locked before entering this function! |
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139 */ |
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140 int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex) |
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141 { |
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142 int retval; |
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143 |
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144 if ( ! cond ) { |
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145 SDL_SetError("Passed a NULL condition variable"); |
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146 return -1; |
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147 } |
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148 |
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149 retval = 0; |
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150 if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) { |
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151 SDL_SetError("pthread_cond_wait() failed"); |
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152 retval = -1; |
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153 } |
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154 return retval; |
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155 } |