From acbda29f838280ba98cf9e9e539e9d8a6e8fc6ad Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 9 Jun 2006 15:07:31 +0000
Subject: Added Om aka Graph aka god knows what

git-svn-id: http://svn.drobilla.net/lad/grauph@9 a436a847-0d15-0410-975c-d299462d15a1
---
 src/engine/PostProcessor.cpp | 122 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 src/engine/PostProcessor.cpp

(limited to 'src/engine/PostProcessor.cpp')

diff --git a/src/engine/PostProcessor.cpp b/src/engine/PostProcessor.cpp
new file mode 100644
index 00000000..65b92015
--- /dev/null
+++ b/src/engine/PostProcessor.cpp
@@ -0,0 +1,122 @@
+/* This file is part of Om.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Om 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.
+ * 
+ * Om 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.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "PostProcessor.h"
+#include <cassert>
+#include <iostream>
+#include <pthread.h>
+#include "Om.h"
+#include "OmApp.h"
+#include "Event.h"
+#include "util/Queue.h"
+#include "Maid.h"
+
+
+using std::cerr; using std::cout; using std::endl;
+
+namespace Om {
+
+bool PostProcessor::m_process_thread_exit_flag = false;
+
+
+PostProcessor::PostProcessor(size_t queue_size)
+: m_events(queue_size),
+  m_thread_exists(false),
+  m_semaphore(0)
+{
+}
+
+
+PostProcessor::~PostProcessor()
+{
+	stop();
+}
+
+
+/** Start the process thread.
+ */
+void
+PostProcessor::start() 
+{
+	cout << "[PostProcessor] Starting." << endl;
+
+	pthread_attr_t attr;
+	pthread_attr_init(&attr);
+	pthread_attr_setstacksize(&attr, 1500000);
+
+	pthread_create(&m_process_thread, &attr, process_events, this);
+	m_thread_exists = true;
+}
+
+
+/** Stop the process thread.
+ */
+void
+PostProcessor::stop()
+{
+	if (m_thread_exists) {
+		m_process_thread_exit_flag = true;
+		pthread_cancel(m_process_thread);
+		pthread_join(m_process_thread, NULL);
+		m_thread_exists = false;
+	}
+}
+
+
+/** Signal the PostProcessor to process all pending events.
+ */
+void
+PostProcessor::signal()
+{
+	m_semaphore.post();
+}
+
+
+void*
+PostProcessor::process_events(void* osc_processer)
+{
+	PostProcessor* me = (PostProcessor*)osc_processer;
+	return me->m_process_events();
+}
+
+
+/** OSC message processing thread.
+ */
+void*
+PostProcessor::m_process_events()
+{
+	Event* ev = NULL;
+	
+	while (true) {
+		m_semaphore.wait();
+		
+		if (m_process_thread_exit_flag)
+			break;
+		
+		while (!m_events.is_empty()) {
+			ev = m_events.pop();
+			assert(ev != NULL);
+			ev->post_process();
+			om->maid()->push(ev);
+		}
+	}
+	
+	cout << "[PostProcessor] Exiting post processor thread." << endl;
+
+	return NULL;
+}
+
+} // namespace Om
-- 
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