Mercurial > sdl-ios-xcode
annotate src/thread/win32/SDL_syssem.c @ 1429:aff0170f9f1b
Date: Sat, 25 Feb 2006 14:26:19 +0100 (CET)
From: "Torsten Giebl"
Subject: [SDL] testpalette.diff
To get rid of Mousecursor Fullscreen problems on Mac OSX.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 25 Feb 2006 15:01:44 +0000 |
| parents | d910939febfa |
| children | bb6839704ed6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 |
| 0 | 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. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
| 0 | 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 |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* Semaphore functions using the Win32 API */ | |
| 25 | |
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26 #include "SDL_windows.h" |
| 0 | 27 |
| 28 #include "SDL_thread.h" | |
| 29 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) | |
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30 #include "win_ce_semaphore.h" |
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31 #endif |
| 0 | 32 |
| 33 | |
| 34 struct SDL_semaphore { | |
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35 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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36 SYNCHHANDLE id; |
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37 #else |
| 0 | 38 HANDLE id; |
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39 #endif |
| 0 | 40 Uint32 volatile count; |
| 41 }; | |
| 42 | |
| 43 | |
| 44 /* Create a semaphore */ | |
| 45 SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) | |
| 46 { | |
| 47 SDL_sem *sem; | |
| 48 | |
| 49 /* Allocate sem memory */ | |
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50 sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); |
| 0 | 51 if ( sem ) { |
| 52 /* Create the semaphore, with max value 32K */ | |
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53 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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54 sem->id = CreateSemaphoreCE(NULL, initial_value, 32*1024, NULL); |
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55 #else |
| 0 | 56 sem->id = CreateSemaphore(NULL, initial_value, 32*1024, NULL); |
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57 #endif |
| 0 | 58 sem->count = initial_value; |
| 59 if ( ! sem->id ) { | |
| 60 SDL_SetError("Couldn't create semaphore"); | |
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61 SDL_free(sem); |
| 0 | 62 sem = NULL; |
| 63 } | |
| 64 } else { | |
| 65 SDL_OutOfMemory(); | |
| 66 } | |
| 67 return(sem); | |
| 68 } | |
| 69 | |
| 70 /* Free the semaphore */ | |
| 71 void SDL_DestroySemaphore(SDL_sem *sem) | |
| 72 { | |
| 73 if ( sem ) { | |
| 74 if ( sem->id ) { | |
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75 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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76 CloseSynchHandle(sem->id); |
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77 #else |
| 0 | 78 CloseHandle(sem->id); |
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79 #endif |
| 0 | 80 sem->id = 0; |
| 81 } | |
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82 SDL_free(sem); |
| 0 | 83 } |
| 84 } | |
| 85 | |
| 86 int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) | |
| 87 { | |
| 88 int retval; | |
| 89 DWORD dwMilliseconds; | |
| 90 | |
| 91 if ( ! sem ) { | |
| 92 SDL_SetError("Passed a NULL sem"); | |
| 93 return -1; | |
| 94 } | |
| 95 | |
| 96 if ( timeout == SDL_MUTEX_MAXWAIT ) { | |
| 97 dwMilliseconds = INFINITE; | |
| 98 } else { | |
| 99 dwMilliseconds = (DWORD)timeout; | |
| 100 } | |
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101 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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102 switch (WaitForSemaphoreCE(sem->id, dwMilliseconds)) { |
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103 #else |
| 0 | 104 switch (WaitForSingleObject(sem->id, dwMilliseconds)) { |
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105 #endif |
| 0 | 106 case WAIT_OBJECT_0: |
| 107 --sem->count; | |
| 108 retval = 0; | |
| 109 break; | |
| 110 case WAIT_TIMEOUT: | |
| 111 retval = SDL_MUTEX_TIMEDOUT; | |
| 112 break; | |
| 113 default: | |
| 114 SDL_SetError("WaitForSingleObject() failed"); | |
| 115 retval = -1; | |
| 116 break; | |
| 117 } | |
| 118 return retval; | |
| 119 } | |
| 120 | |
| 121 int SDL_SemTryWait(SDL_sem *sem) | |
| 122 { | |
| 123 return SDL_SemWaitTimeout(sem, 0); | |
| 124 } | |
| 125 | |
| 126 int SDL_SemWait(SDL_sem *sem) | |
| 127 { | |
| 128 return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); | |
| 129 } | |
| 130 | |
| 131 /* Returns the current count of the semaphore */ | |
| 132 Uint32 SDL_SemValue(SDL_sem *sem) | |
| 133 { | |
| 134 if ( ! sem ) { | |
| 135 SDL_SetError("Passed a NULL sem"); | |
| 136 return 0; | |
| 137 } | |
| 138 return sem->count; | |
| 139 } | |
| 140 | |
| 141 int SDL_SemPost(SDL_sem *sem) | |
| 142 { | |
| 143 if ( ! sem ) { | |
| 144 SDL_SetError("Passed a NULL sem"); | |
| 145 return -1; | |
| 146 } | |
| 147 /* Increase the counter in the first place, because | |
| 148 * after a successful release the semaphore may | |
| 149 * immediately get destroyed by another thread which | |
| 150 * is waiting for this semaphore. | |
| 151 */ | |
| 152 ++sem->count; | |
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153 #if defined(_WIN32_WCE) && (_WIN32_WCE < 300) |
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154 if ( ReleaseSemaphoreCE(sem->id, 1, NULL) == FALSE ) { |
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155 #else |
| 0 | 156 if ( ReleaseSemaphore(sem->id, 1, NULL) == FALSE ) { |
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157 #endif |
| 0 | 158 --sem->count; /* restore */ |
| 159 SDL_SetError("ReleaseSemaphore() failed"); | |
| 160 return -1; | |
| 161 } | |
| 162 return 0; | |
| 163 } |