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1 | /* Plain recursive mutexes (native Windows implementation). |
2 | Copyright (C) 2005-2019 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 3, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, see <https://www.gnu.org/licenses/>. */ | |
16 | ||
17 | /* Written by Bruno Haible <bruno@clisp.org>, 2005. | |
18 | Based on GCC's gthr-win32.h. */ | |
19 | ||
20 | #ifndef _WINDOWS_RECMUTEX_H | |
21 | #define _WINDOWS_RECMUTEX_H | |
22 | ||
23 | #define WIN32_LEAN_AND_MEAN /* avoid including junk */ | |
24 | #include <windows.h> | |
25 | ||
26 | #include "windows-initguard.h" | |
27 | ||
28 | /* The native Windows documentation says that CRITICAL_SECTION already | |
29 | implements a recursive lock. But we need not rely on it: It's easy to | |
30 | implement a recursive lock without this assumption. */ | |
31 | ||
32 | typedef struct | |
33 | { | |
34 | glwthread_initguard_t guard; /* protects the initialization */ | |
35 | DWORD owner; | |
36 | unsigned long depth; | |
37 | CRITICAL_SECTION lock; | |
38 | } | |
39 | glwthread_recmutex_t; | |
40 | ||
41 | #define GLWTHREAD_RECMUTEX_INIT { GLWTHREAD_INITGUARD_INIT, 0, 0 } | |
42 | ||
43 | #ifdef __cplusplus | |
44 | extern "C" { | |
45 | #endif | |
46 | ||
47 | extern void glwthread_recmutex_init (glwthread_recmutex_t *mutex); | |
48 | extern int glwthread_recmutex_lock (glwthread_recmutex_t *mutex); | |
49 | extern int glwthread_recmutex_trylock (glwthread_recmutex_t *mutex); | |
50 | extern int glwthread_recmutex_unlock (glwthread_recmutex_t *mutex); | |
51 | extern int glwthread_recmutex_destroy (glwthread_recmutex_t *mutex); | |
52 | ||
53 | #ifdef __cplusplus | |
54 | } | |
55 | #endif | |
56 | ||
57 | #endif /* _WINDOWS_RECMUTEX_H */ |