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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/clients/ThreadedSigClientInterface.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/clients/ThreadedSigClientInterface.cpp')
-rw-r--r--src/clients/ThreadedSigClientInterface.cpp71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/clients/ThreadedSigClientInterface.cpp b/src/clients/ThreadedSigClientInterface.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 "ThreadedSigClientInterface.h"
+#include <iostream>
+using std::cerr; using std::endl;
+
+namespace LibOmClient {
+
+
+/** Push an event (from the engine, ie 'new patch') on to the queue.
+ */
+void
+ThreadedSigClientInterface::push_sig(Closure ev)
+{
+ cerr << "-- pushing event\n";
+
+ bool success = false;
+ bool first = true;
+
+ // (Very) slow busy-wait if the queue is full
+ // FIXME: Make this wait on a signal from process_sigs iff this happens
+ while (!success) {
+ success = _sigs.push(ev);
+ if (!success) {
+ if (first) {
+ cerr << "[ThreadedSigClientInterface] WARNING: (Client) event queue full. Waiting to try again..." << endl;
+ first = false;
+ }
+ usleep(200000); // 100 milliseconds (2* rate process_sigs is called)
+ }
+ }
+}
+
+
+/** Process all queued events that came from the OSC thread.
+ *
+ * This function should be called from the Gtk thread to emit signals and cause
+ * the connected methods to execute.
+ */
+bool
+ThreadedSigClientInterface::emit_signals()
+{
+ // Process a maximum of queue-size events, to prevent locking the GTK
+ // thread indefinitely while processing continually arriving events
+ size_t num_processed = 0;
+ while (!_sigs.is_empty() && num_processed++ < _sigs.capacity()/2) {
+ cerr << "-- emitting event\n";
+ Closure& ev = _sigs.pop();
+ ev();
+ ev.disconnect();
+ }
+
+ return true;
+}
+
+
+} // namespace LibOmClient