1 /* Plain mutexes (native Windows implementation).
2    Copyright (C) 2005-2020 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_MUTEX_H
21 #define _WINDOWS_MUTEX_H
22 
23 #define WIN32_LEAN_AND_MEAN  /* avoid including junk */
24 #include <windows.h>
25 
26 #include "windows-initguard.h"
27 
28 typedef struct
29         {
30           glwthread_initguard_t guard; /* protects the initialization */
31           CRITICAL_SECTION lock;
32         }
33         glwthread_mutex_t;
34 
35 #define GLWTHREAD_MUTEX_INIT { GLWTHREAD_INITGUARD_INIT }
36 
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40 
41 extern void glwthread_mutex_init (glwthread_mutex_t *mutex);
42 extern int glwthread_mutex_lock (glwthread_mutex_t *mutex);
43 extern int glwthread_mutex_trylock (glwthread_mutex_t *mutex);
44 extern int glwthread_mutex_unlock (glwthread_mutex_t *mutex);
45 extern int glwthread_mutex_destroy (glwthread_mutex_t *mutex);
46 
47 #ifdef __cplusplus
48 }
49 #endif
50 
51 #endif /* _WINDOWS_MUTEX_H */
52