Mercurial > sdl-ios-xcode
annotate src/thread/win32/SDL_sysmutex.c @ 1635:92947e3a18db
Make sure code is only compiled if the appropriate subsystem is enabled
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 14 Apr 2006 04:46:47 +0000 |
parents | bb6839704ed6 |
children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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Updated copyright information and removed rcs id lines (problematic in branch merges)
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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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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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
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changeset
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13 Lesser General Public License for more details. |
0 | 14 |
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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15 You should have received a copy of the GNU Lesser General Public |
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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16 License along with this library; if not, write to the Free Software |
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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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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Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
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20 slouken@libsdl.org |
0 | 21 */ |
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Use consistent identifiers for the various platforms we support.
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22 #include "SDL_config.h" |
0 | 23 |
24 /* Mutex functions using the Win32 API */ | |
25 | |
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SDL_windows.h is no longer necessary
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26 #define WIN32_LEAN_AND_MEAN |
bb6839704ed6
SDL_windows.h is no longer necessary
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27 #include <windows.h> |
0 | 28 |
29 #include "SDL_mutex.h" | |
30 | |
31 | |
32 struct SDL_mutex { | |
33 HANDLE id; | |
34 }; | |
35 | |
36 /* Create a mutex */ | |
37 SDL_mutex *SDL_CreateMutex(void) | |
38 { | |
39 SDL_mutex *mutex; | |
40 | |
41 /* Allocate mutex memory */ | |
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Sam Lantinga <slouken@libsdl.org>
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42 mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex)); |
0 | 43 if ( mutex ) { |
44 /* Create the mutex, with initial value signaled */ | |
45 mutex->id = CreateMutex(NULL, FALSE, NULL); | |
46 if ( ! mutex->id ) { | |
47 SDL_SetError("Couldn't create mutex"); | |
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
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48 SDL_free(mutex); |
0 | 49 mutex = NULL; |
50 } | |
51 } else { | |
52 SDL_OutOfMemory(); | |
53 } | |
54 return(mutex); | |
55 } | |
56 | |
57 /* Free the mutex */ | |
58 void SDL_DestroyMutex(SDL_mutex *mutex) | |
59 { | |
60 if ( mutex ) { | |
61 if ( mutex->id ) { | |
62 CloseHandle(mutex->id); | |
63 mutex->id = 0; | |
64 } | |
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3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
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65 SDL_free(mutex); |
0 | 66 } |
67 } | |
68 | |
69 /* Lock the mutex */ | |
70 int SDL_mutexP(SDL_mutex *mutex) | |
71 { | |
72 if ( mutex == NULL ) { | |
73 SDL_SetError("Passed a NULL mutex"); | |
74 return -1; | |
75 } | |
76 if ( WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED ) { | |
77 SDL_SetError("Couldn't wait on mutex"); | |
78 return -1; | |
79 } | |
80 return(0); | |
81 } | |
82 | |
83 /* Unlock the mutex */ | |
84 int SDL_mutexV(SDL_mutex *mutex) | |
85 { | |
86 if ( mutex == NULL ) { | |
87 SDL_SetError("Passed a NULL mutex"); | |
88 return -1; | |
89 } | |
90 if ( ReleaseMutex(mutex->id) == FALSE ) { | |
91 SDL_SetError("Couldn't release mutex"); | |
92 return -1; | |
93 } | |
94 return(0); | |
95 } |