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+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library 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.
+
+ The GNU C Library 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 the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SEMAPHORE_H
+#define _SEMAPHORE_H 1
+
+#include <features.h>
+#include <sys/types.h>
+#ifdef __USE_XOPEN2K
+# define __need_timespec
+# include <time.h>
+#endif
+
+/* Get the definition for sem_t. */
+#include <bits/semaphore.h>
+
+
+__BEGIN_DECLS
+
+/* Initialize semaphore object SEM to VALUE. If PSHARED then share it
+ with other processes. */
+extern int sem_init (sem_t *__sem, int __pshared, unsigned int __value)
+ __THROW;
+/* Free resources associated with semaphore object SEM. */
+extern int sem_destroy (sem_t *__sem) __THROW;
+
+/* Open a named semaphore NAME with open flags OFLAG. */
+extern sem_t *sem_open (__const char *__name, int __oflag, ...) __THROW;
+
+/* Close descriptor for named semaphore SEM. */
+extern int sem_close (sem_t *__sem) __THROW;
+
+/* Remove named semaphore NAME. */
+extern int sem_unlink (__const char *__name) __THROW;
+
+/* Wait for SEM being posted.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int sem_wait (sem_t *__sem);
+
+#ifdef __USE_XOPEN2K
+/* Similar to `sem_wait' but wait only until ABSTIME.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+extern int sem_timedwait (sem_t *__restrict __sem,
+ __const struct timespec *__restrict __abstime);
+#endif
+
+/* Test whether SEM is posted. */
+extern int sem_trywait (sem_t *__sem) __THROW;
+
+/* Post SEM. */
+extern int sem_post (sem_t *__sem) __THROW;
+
+/* Get current value of SEM and store it in *SVAL. */
+extern int sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval)
+ __THROW;
+
+
+__END_DECLS
+
+#endif /* semaphore.h */