initial checkin

Check in contents of upstream 1.4.2 tarball, exclude generated files.

1 files changed, 44 insertions, 0 deletions

diff --git a/src/threads/sema.h b/src/threads/sema.h
new file mode 100644
index 0000000..0cd04a5
--- /dev/null
+++ b/src/threads/sema.h
@@ -0,0 +1,44 @@
+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    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 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifndef _H_SEMAPHORE
+#define _H_SEMAPHORE
+
+#include <semaphore.h>
+
+class t_semaphore {
+private:
+	sem_t	sem;
+
+public:
+	// Throws a string exception (error message) when failing.
+	t_semaphore(unsigned int value);
+
+	~t_semaphore();
+
+	// Throws a string exception (error message) when failing.
+	void up(void);
+
+	void down(void);
+
+	// Returns true if downing the semaphore succeeded.
+	// Returns false if the semaphore was zero already.
+	bool try_down(void);
+};
+
+#endif