Mercurial > sdl-ios-xcode
annotate src/thread/nds/SDL_sysmutex.c @ 3168:6338b7f2d024
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> |
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date | Sun, 07 Jun 2009 02:44:46 +0000 |
parents | 99210400e8b9 |
children | 0d1b16ee0bca |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
2859 | 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 Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 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 Library 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 Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@devolution.com |
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21 */ |
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22 |
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23 #ifdef SAVE_RCSID |
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24 static char rcsid = |
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25 "@(#) $Id: SDL_sysmutex.c,v 1.2 2001/04/26 16:50:18 hercules Exp $"; |
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26 #endif |
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27 |
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28 /* An implementation of mutexes using semaphores */ |
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29 |
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30 #include <stdio.h> |
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31 #include <stdlib.h> |
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32 |
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33 #include "SDL_error.h" |
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34 #include "SDL_thread.h" |
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35 #include "SDL_systhread_c.h" |
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36 |
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37 |
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38 struct SDL_mutex |
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39 { |
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40 int recursive; |
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41 Uint32 owner; |
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42 SDL_sem *sem; |
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43 }; |
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44 |
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45 /* Create a mutex */ |
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46 SDL_mutex * |
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47 SDL_CreateMutex(void) |
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48 { |
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49 SDL_mutex *mutex; |
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50 |
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51 /* Allocate mutex memory */ |
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52 mutex = (SDL_mutex *) malloc(sizeof(*mutex)); |
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53 if (mutex) { |
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54 /* Create the mutex semaphore, with initial value 1 */ |
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55 mutex->sem = SDL_CreateSemaphore(1); |
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56 mutex->recursive = 0; |
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57 mutex->owner = 0; |
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58 if (!mutex->sem) { |
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59 free(mutex); |
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60 mutex = NULL; |
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61 } |
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62 } else { |
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63 SDL_OutOfMemory(); |
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64 } |
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65 return mutex; |
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66 } |
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67 |
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68 /* Free the mutex */ |
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69 void |
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70 SDL_DestroyMutex(SDL_mutex * mutex) |
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71 { |
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72 if (mutex) { |
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73 if (mutex->sem) { |
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74 SDL_DestroySemaphore(mutex->sem); |
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75 } |
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76 free(mutex); |
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77 } |
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78 } |
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79 |
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80 /* Lock the semaphore */ |
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81 int |
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82 SDL_mutexP(SDL_mutex * mutex) |
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83 { |
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84 #ifdef DISABLE_THREADS |
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85 return 0; |
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86 #else |
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87 Uint32 this_thread; |
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88 |
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89 if (mutex == NULL) { |
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90 SDL_SetError("Passed a NULL mutex"); |
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91 return -1; |
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92 } |
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93 |
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94 this_thread = SDL_ThreadID(); |
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95 if (mutex->owner == this_thread) { |
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96 ++mutex->recursive; |
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97 } else { |
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98 /* The order of operations is important. |
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99 We set the locking thread id after we obtain the lock |
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100 so unlocks from other threads will fail. |
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101 */ |
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102 SDL_SemWait(mutex->sem); |
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103 mutex->owner = this_thread; |
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104 mutex->recursive = 0; |
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105 } |
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106 |
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107 return 0; |
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108 #endif /* DISABLE_THREADS */ |
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109 } |
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110 |
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111 /* Unlock the mutex */ |
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112 int |
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113 SDL_mutexV(SDL_mutex * mutex) |
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114 { |
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115 #ifdef DISABLE_THREADS |
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116 return 0; |
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117 #else |
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118 if (mutex == NULL) { |
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119 SDL_SetError("Passed a NULL mutex"); |
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120 return -1; |
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121 } |
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122 |
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123 /* If we don't own the mutex, we can't unlock it */ |
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124 if (SDL_ThreadID() != mutex->owner) { |
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125 SDL_SetError("mutex not owned by this thread"); |
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126 return -1; |
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127 } |
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128 |
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129 if (mutex->recursive) { |
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130 --mutex->recursive; |
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131 } else { |
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132 /* The order of operations is important. |
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133 First reset the owner so another thread doesn't lock |
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134 the mutex and set the ownership before we reset it, |
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135 then release the lock semaphore. |
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136 */ |
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137 mutex->owner = 0; |
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138 SDL_SemPost(mutex->sem); |
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139 } |
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140 return 0; |
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141 #endif /* DISABLE_THREADS */ |
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142 } |