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comparison src/thread/windows/SDL_sysmutex.c @ 5062:e8916fe9cfc8

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Fixed bug #925 Changed "win32" to "windows"
author Sam Lantinga <slouken@libsdl.org>
date Thu, 20 Jan 2011 18:04:05 -0800
parents src/thread/win32/SDL_sysmutex.c@f7b03b6838cb
children 327f181542f1
comparison
equal deleted inserted replaced
5061:9e9940eae455 5062:e8916fe9cfc8
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: */