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/* Spin locks (native Windows implementation).
Copyright (C) 2019-2021 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2019. */
#ifndef _WINDOWS_SPIN_H
#define _WINDOWS_SPIN_H
#define WIN32_LEAN_AND_MEAN /* avoid including junk */
#include <windows.h>
typedef struct
{
LONG volatile word;
}
glwthread_spinlock_t;
#define GLWTHREAD_SPIN_INIT { 0 }
#ifdef __cplusplus
extern "C" {
#endif
extern void glwthread_spin_init (glwthread_spinlock_t *lock);
extern int glwthread_spin_lock (glwthread_spinlock_t *lock);
extern int glwthread_spin_trylock (glwthread_spinlock_t *lock);
extern int glwthread_spin_unlock (glwthread_spinlock_t *lock);
extern int glwthread_spin_destroy (glwthread_spinlock_t *lock);
#ifdef __cplusplus
}
#endif
#endif /* _WINDOWS_SPIN_H */
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