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+/* Condition variables (native Windows implementation).
+ Copyright (C) 2008-2024 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 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 */