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/* Condition variables (native Windows implementation).
Copyright (C) 2008-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
/* Written by Yoann Vandoorselaere <yoann@prelude-ids.org>, 2008.
Based on Bruno Haible <bruno@clisp.org> lock.h */
#ifndef _WINDOWS_COND_H
#define _WINDOWS_COND_H
#define WIN32_LEAN_AND_MEAN /* avoid including junk */
#include <windows.h>
#include <time.h>
#include "windows-initguard.h"
#ifndef _glwthread_linked_waitqueue_link_defined
#define _glwthread_linked_waitqueue_link_defined
struct glwthread_waitqueue_link
{
struct glwthread_waitqueue_link *wql_next;
struct glwthread_waitqueue_link *wql_prev;
};
#endif /* _glwthread_linked_waitqueue_link_defined */
typedef struct
{
struct glwthread_waitqueue_link wq_list; /* circular list of waiting threads */
}
glwthread_linked_waitqueue_t;
typedef struct
{
glwthread_initguard_t guard; /* protects the initialization */
CRITICAL_SECTION lock; /* protects the remaining fields */
glwthread_linked_waitqueue_t waiters; /* waiting threads */
}
glwthread_cond_t;
#define GLWTHREAD_COND_INIT { GLWTHREAD_INITGUARD_INIT }
#ifdef __cplusplus
extern "C" {
#endif
extern int glwthread_cond_init (glwthread_cond_t *cond);
/* Here, to cope with the various types of mutexes, the mutex is a 'void *', and
the caller needs to pass the corresponding *_lock and *_unlock functions. */
extern int glwthread_cond_wait (glwthread_cond_t *cond,
void *mutex,
int (*mutex_lock) (void *),
int (*mutex_unlock) (void *));
extern int glwthread_cond_timedwait (glwthread_cond_t *cond,
void *mutex,
int (*mutex_lock) (void *),
int (*mutex_unlock) (void *),
const struct timespec *abstime);
extern int glwthread_cond_signal (glwthread_cond_t *cond);
extern int glwthread_cond_broadcast (glwthread_cond_t *cond);
extern int glwthread_cond_destroy (glwthread_cond_t *cond);
#ifdef __cplusplus
}
#endif
#endif /* _WINDOWS_COND_H */
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