Mercurial > sdl-ios-xcode
comparison src/thread/windows/SDL_sysmutex.c @ 5062:e8916fe9cfc8
Fixed bug #925
Changed "win32" to "windows"
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 20 Jan 2011 18:04:05 -0800 |
parents | src/thread/win32/SDL_sysmutex.c@f7b03b6838cb |
children | 327f181542f1 |
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5061:9e9940eae455 | 5062:e8916fe9cfc8 |
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1 /* | |
2 SDL - Simple DirectMedia Layer | |
3 Copyright (C) 1997-2010 Sam Lantinga | |
4 | |
5 This library is free software; you can redistribute it and/or | |
6 modify it under the terms of the GNU Lesser General Public | |
7 License as published by the Free Software Foundation; either | |
8 version 2.1 of the License, or (at your option) any later version. | |
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 | |
13 Lesser General Public License for more details. | |
14 | |
15 You should have received a copy of the GNU Lesser General Public | |
16 License along with this library; if not, write to the Free Software | |
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | |
19 Sam Lantinga | |
20 slouken@libsdl.org | |
21 */ | |
22 #include "SDL_config.h" | |
23 | |
24 /* Mutex functions using the Win32 API */ | |
25 | |
26 #define WIN32_LEAN_AND_MEAN | |
27 #include <windows.h> | |
28 | |
29 #include "SDL_mutex.h" | |
30 | |
31 | |
32 struct SDL_mutex | |
33 { | |
34 HANDLE id; | |
35 }; | |
36 | |
37 /* Create a mutex */ | |
38 SDL_mutex * | |
39 SDL_CreateMutex(void) | |
40 { | |
41 SDL_mutex *mutex; | |
42 | |
43 /* Allocate mutex memory */ | |
44 mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex)); | |
45 if (mutex) { | |
46 /* Create the mutex, with initial value signaled */ | |
47 mutex->id = CreateMutex(NULL, FALSE, NULL); | |
48 if (!mutex->id) { | |
49 SDL_SetError("Couldn't create mutex"); | |
50 SDL_free(mutex); | |
51 mutex = NULL; | |
52 } | |
53 } else { | |
54 SDL_OutOfMemory(); | |
55 } | |
56 return (mutex); | |
57 } | |
58 | |
59 /* Free the mutex */ | |
60 void | |
61 SDL_DestroyMutex(SDL_mutex * mutex) | |
62 { | |
63 if (mutex) { | |
64 if (mutex->id) { | |
65 CloseHandle(mutex->id); | |
66 mutex->id = 0; | |
67 } | |
68 SDL_free(mutex); | |
69 } | |
70 } | |
71 | |
72 /* Lock the mutex */ | |
73 int | |
74 SDL_mutexP(SDL_mutex * mutex) | |
75 { | |
76 if (mutex == NULL) { | |
77 SDL_SetError("Passed a NULL mutex"); | |
78 return -1; | |
79 } | |
80 if (WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED) { | |
81 SDL_SetError("Couldn't wait on mutex"); | |
82 return -1; | |
83 } | |
84 return (0); | |
85 } | |
86 | |
87 /* Unlock the mutex */ | |
88 int | |
89 SDL_mutexV(SDL_mutex * mutex) | |
90 { | |
91 if (mutex == NULL) { | |
92 SDL_SetError("Passed a NULL mutex"); | |
93 return -1; | |
94 } | |
95 if (ReleaseMutex(mutex->id) == FALSE) { | |
96 SDL_SetError("Couldn't release mutex"); | |
97 return -1; | |
98 } | |
99 return (0); | |
100 } | |
101 | |
102 /* vi: set ts=4 sw=4 expandtab: */ |