Moved generic utility stuff to new library "raul".

git-svn-id: http://svn.drobilla.net/lad/raul@156 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 66 insertions, 0 deletions

diff --git a/raul/Slave.h b/raul/Slave.h
new file mode 100644
index 0000000..c16818b
--- /dev/null
+++ b/raul/Slave.h
@@ -0,0 +1,66 @@
+/* This file is part of Ingen.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef RAUL_SLAVE_H
+#define RAUL_SLAVE_H
+
+#include <pthread.h>
+#include "raul/Semaphore.h"
+#include "raul/Thread.h"
+
+
+/** Thread driven by (realtime safe) signals.
+ *
+ * Use this to perform some task in a separate thread you want to 'drive'
+ * from a realtime (or otherwise) thread.
+ *
+ * \ingroup engine
+ */
+class Slave : public Thread
+{
+public:
+	Slave() : _whip(0) {}
+
+	/** Tell the slave to do whatever work it does.  Realtime safe. */
+	inline void whip() { _whip.post(); }
+
+protected:
+	/** Worker method.
+	 *
+	 * This is called once from this thread every time whip() is called.
+	 * Implementations likely want to put a single (non loop) chunk of code
+	 * here, e.g. to process an event.
+	 */
+	virtual void _whipped() = 0;
+
+	Semaphore _whip;
+
+private:
+	// Prevent copies (undefined)
+	Slave(const Slave&);
+	Slave& operator=(const Slave&);
+
+	inline void _run()
+	{
+		while (true) {
+			_whip.wait();
+			_whipped();
+		}
+	}
+};
+
+
+#endif // RAUL_SLAVE_H