JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / runtime / WatchdogMac.cpp

diff --git a/runtime/WatchdogMac.cpp b/runtime/WatchdogMac.cpp
new file mode 100644 (file)
index 0000000..ca474df
--- /dev/null
+++ b/runtime/WatchdogMac.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "Watchdog.h"
+
+namespace JSC {
+
+void Watchdog::initTimer()
+{
+    m_queue = 0;
+    m_timer = 0;
+}
+
+void Watchdog::destroyTimer()
+{
+    ASSERT(!m_timer);
+    if (m_queue)
+        dispatch_release(m_queue);
+}
+
+void Watchdog::startTimer(double limit)
+{
+    ASSERT(!m_timer);
+    if (!m_queue)
+        m_queue = dispatch_queue_create("jsc.watchdog.queue", 0);
+    m_timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, m_queue);
+
+    dispatch_source_set_timer(m_timer,
+        dispatch_time(DISPATCH_TIME_NOW, limit * NSEC_PER_SEC),
+        DISPATCH_TIME_FOREVER, 0);
+
+    dispatch_source_set_event_handler(m_timer, ^{
+        m_timerDidFire = true;
+    });
+
+    dispatch_resume(m_timer);
+}
+
+void Watchdog::stopTimer()
+{
+    ASSERT(m_queue);
+    dispatch_sync(m_queue, ^{
+        dispatch_source_cancel(m_timer);
+    });
+    dispatch_release(m_timer);
+    m_timer = 0;
+}
+
+} // namespace JSC