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, 107 insertions, 0 deletions

diff --git a/raul/Thread.h b/raul/Thread.h
new file mode 100644
index 0000000..37dcacd
--- /dev/null
+++ b/raul/Thread.h
@@ -0,0 +1,107 @@
+/* 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_THREAD_H
+#define RAUL_THREAD_H
+
+#include <string>
+#include <iostream>
+#include <pthread.h>
+
+
+/** Abstract base class for a thread.
+ *
+ * Extend this and override the _run method to easily create a thread
+ * to perform some task.
+ *
+ * \ingroup engine
+ */
+class Thread
+{
+public:
+	Thread() : _pthread_exists(false) {}
+
+	virtual ~Thread() { stop(); }
+	
+	void set_name(const std::string& name) { _name = name; }
+	
+	/** Launch and start the thread. */
+	virtual void start() {
+		std::cout << "[" << _name << " Thread] Starting." << std::endl;
+
+		pthread_attr_t attr;
+		pthread_attr_init(&attr);
+		pthread_attr_setstacksize(&attr, 1500000);
+
+		pthread_create(&_pthread, &attr, _static_run, this);
+		_pthread_exists = true;
+	}
+
+	/** Stop and terminate the thread. */
+	virtual void stop() {
+		if (_pthread_exists) {
+			pthread_cancel(_pthread);
+			pthread_join(_pthread, NULL);
+			_pthread_exists = false;
+		}
+	}
+
+	void set_scheduling(int policy, unsigned int priority) {
+		sched_param sp;
+		sp.sched_priority = priority;
+		int result = pthread_setschedparam(_pthread, SCHED_FIFO, &sp);
+		if (!result) {
+			std::cout << "[" << _name << "] Set scheduling policy to ";
+			switch (policy) {
+				case SCHED_FIFO:  std::cout << "SCHED_FIFO";  break;
+				case SCHED_RR:    std::cout << "SCHED_RR";    break;
+				case SCHED_OTHER: std::cout << "SCHED_OTHER"; break;
+				default:          std::cout << "UNKNOWN";     break;
+			}
+			std::cout << ", priority " << sp.sched_priority << std::endl;
+		} else {
+			std::cout << "[" << _name << "] Unable to set scheduling policy ("
+				<< strerror(result) << ")" << std::endl;
+		}
+	}
+
+
+protected:
+	/** Thread function to execute.
+	 *
+	 * This is called once on start, and terminated on stop.
+	 * Implementations likely want to put some infinite loop here.
+	 */
+	virtual void _run() = 0;
+
+private:
+	// Prevent copies (undefined)
+	Thread(const Thread&);
+	Thread& operator=(const Thread&);
+
+	inline static void* _static_run(void* me) {
+		Thread* myself = (Thread*)me;
+		myself->_run();
+		return NULL; // and I
+	}
+
+	std::string _name;
+	bool        _pthread_exists;
+	pthread_t   _pthread;
+};
+
+
+#endif // RAUL_THREAD_H