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[gnulib.git] / lib / windows-spin.h
blob948b4f6caf95e7766aa5a501c592f08a0311cf4e
1 /* Spin locks (native Windows implementation).
2 Copyright (C) 2019-2024 Free Software Foundation, Inc.
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.
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.
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/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2019. */
19 #ifndef _WINDOWS_SPIN_H
20 #define _WINDOWS_SPIN_H
22 #define WIN32_LEAN_AND_MEAN /* avoid including junk */
23 #include <windows.h>
25 typedef struct
27 LONG volatile word;
29 glwthread_spinlock_t;
31 #define GLWTHREAD_SPIN_INIT { 0 }
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
37 extern void glwthread_spin_init (glwthread_spinlock_t *lock);
38 extern int glwthread_spin_lock (glwthread_spinlock_t *lock);
39 extern int glwthread_spin_trylock (glwthread_spinlock_t *lock);
40 extern int glwthread_spin_unlock (glwthread_spinlock_t *lock);
41 extern int glwthread_spin_destroy (glwthread_spinlock_t *lock);
43 #ifdef __cplusplus
45 #endif
47 #endif /* _WINDOWS_SPIN_H */