1/* Plain recursive mutexes (native Windows implementation).
2   Copyright (C) 2005-2022 Free Software Foundation, Inc.
3
4   This file is free software: you can redistribute it and/or modify
5   it under the terms of the GNU Lesser General Public License as
6   published by the Free Software Foundation; either version 2.1 of the
7   License, or (at your option) any later version.
8
9   This file 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 Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser 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
32typedef 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
44extern "C" {
45#endif
46
47extern void glwthread_recmutex_init (glwthread_recmutex_t *mutex);
48extern int glwthread_recmutex_lock (glwthread_recmutex_t *mutex);
49extern int glwthread_recmutex_trylock (glwthread_recmutex_t *mutex);
50extern int glwthread_recmutex_unlock (glwthread_recmutex_t *mutex);
51extern int glwthread_recmutex_destroy (glwthread_recmutex_t *mutex);
52
53#ifdef __cplusplus
54}
55#endif
56
57#endif /* _WINDOWS_RECMUTEX_H */
58