add new file.

winsup/cygwin/include/semaphore.h

@@ -0,0 +1,41 @@
+/* semaphore.h: POSIX semaphore interface
+
+   Copyright 2001 Red Hat, Inc.
+
+   Written by Robert Collins <rbtcollins@hotmail.com>
+
+   This file is part of Cygwin.
+
+   This software is a copyrighted work licensed under the terms of the
+   Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+   details. */
+
+#include <sys/types.h>
+
+#ifndef _SEMAPHORE_H
+#define _SEMAPHORE_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#ifndef __INSIDE_CYGWIN__
+  typedef void *sem_t;
+#endif
+
+#define SEM_FAILED 0
+#define SEM_VALUE_MAX 1147483648
+
+/* Semaphores */
+  int sem_init (sem_t * sem, int pshared, unsigned int value);
+  int sem_destroy (sem_t * sem);
+  int sem_wait (sem_t * sem);
+  int sem_trywait (sem_t * sem);
+  int sem_post (sem_t * sem);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* _SEMAPHORE_H */