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authorDavid Robillard <d@drobilla.net>2006-06-09 15:07:31 +0000
committerDavid Robillard <d@drobilla.net>2006-06-09 15:07:31 +0000
commitacbda29f838280ba98cf9e9e539e9d8a6e8fc6ad (patch)
treee31b37a2456e6d1e564c9a7146c88be259d338b0 /src/engine/PostProcessor.cpp
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Added Om aka Graph aka god knows what
git-svn-id: http://svn.drobilla.net/lad/grauph@9 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/engine/PostProcessor.cpp')
-rw-r--r--src/engine/PostProcessor.cpp122
1 files changed, 122 insertions, 0 deletions
diff --git a/src/engine/PostProcessor.cpp b/src/engine/PostProcessor.cpp
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+/* 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