1 files changed, 80 insertions, 0 deletions
diff --git a/include/semaphore.h b/include/semaphore.h
new file mode 100644
index 000000000..84742233b
--- /dev/null
+++ b/include/semaphore.h
@@ -0,0 +1,80 @@
+/* Linuxthreads - a simple clone()-based implementation of Posix        */
+/* threads for Linux.                                                   */
+/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr)              */
+/*                                                                      */
+/* This program is free software; you can redistribute it and/or        */
+/* modify it under the terms of the GNU Library General Public License  */
+/* as published by the Free Software Foundation; either version 2       */
+/* of the License, 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 Library General Public License for more details.                 */
+
+#ifndef _SEMAPHORE_H
+#define _SEMAPHORE_H    1
+
+#include <features.h>
+#include <sys/types.h>
+
+#ifndef _PTHREAD_DESCR_DEFINED
+/* Thread descriptors.  Needed for `sem_t' definition.  */
+typedef struct _pthread_descr_struct *_pthread_descr;
+# define _PTHREAD_DESCR_DEFINED
+#endif
+
+/* System specific semaphore definition.  */
+typedef struct
+{
+  struct
+  {
+    long int status;
+    int spinlock;
+  } __sem_lock;
+  int __sem_value;
+  _pthread_descr __sem_waiting;
+} sem_t;
+
+
+
+/* Value returned if `sem_open' failed.  */
+#define SEM_FAILED	((sem_t *) 0)
+
+/* Maximum value the semaphore can have.  */
+#define SEM_VALUE_MAX 	((int) ((~0u) >> 1))
+
+
+__BEGIN_DECLS
+
+/* Initialize semaphore object SEM to VALUE.  If PSHARED then share it
+   with other processes.  */
+extern int sem_init __P ((sem_t *__sem, int __pshared, unsigned int __value));
+
+/* Free resources associated with semaphore object SEM.  */
+extern int sem_destroy __P ((sem_t *__sem));
+
+/* Open a named semaphore NAME with open flaot OFLAG.  */
+extern sem_t *sem_open __P ((__const char *__name, int __oflag, ...));
+
+/* Close descriptor for named semaphore SEM.  */
+extern int sem_close __P ((sem_t *__sem));
+
+/* Remove named semaphore NAME.  */
+extern int sem_unlink __P ((__const char *__name));
+
+/* Wait for SEM being posted.  */
+extern int sem_wait __P ((sem_t *__sem));
+
+/* Test whether SEM is posted.  */
+extern int sem_trywait __P ((sem_t *__sem));
+
+/* Post SEM.  */
+extern int sem_post __P ((sem_t *__sem));
+
+/* Get current value of SEM and store it in *SVAL.  */
+extern int sem_getvalue __P ((sem_t *__sem, int *__sval));
+
+__END_DECLS
+
+#endif  /* semaphore.h */