Stream scripts to V8 as they load - Blink side.

Source/bindings/core/v8/V8ScriptStreamerThread.h

+/*
+ * Copyright (C) 2014 Google Inc. All rights reserved.

[haraken, 2014/08/17 16:05:27]

Nit: Use the 3-line copyright.

[marja, 2014/08/20 11:45:56]

Done.

+ *
+ * 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. AND ITS CONTRIBUTORS ``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 ITS 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.
+ */
+
+#ifndef V8ScriptStreamerThread_h
+#define V8ScriptStreamerThread_h
+
+#include "platform/TaskSynchronizer.h"
+#include "public/platform/WebThread.h"
+#include "wtf/OwnPtr.h"
+
+#include <v8.h>
+
+namespace blink {
+
+class V8ScriptStreamer;
+
+// A singleton thread for running background tasks for script streaming.
+class V8ScriptStreamerThread {

[haraken, 2014/08/17 16:05:27]

V8ScriptStreamerThread => ScriptStreamerThread

We don't want to have a prefix "V8" for newly introduced classes.

[marja, 2014/08/20 11:45:56]

Done.

+public:
+    static void init();
+    static void shutdown();
+    static V8ScriptStreamerThread* shared();
+
+    void postTask(WebThread::Task*);
+
+    bool isRunningTask() const
+    {
+        return m_runningTask;
+    }
+
+    static void taskDone(void*)
+    {
+        shared()->m_runningTask = false;
+    }
+
+private:
+    V8ScriptStreamerThread()
+        : m_runningTask(false) { }
+
+    bool isRunning()
+    {
+        return !!m_thread;
+    }
+
+    void markAsCompleted(TaskSynchronizer* taskSynchronizer)
+    {
+        taskSynchronizer->taskCompleted();
+    }
+
+    blink::WebThread& platformThread();
+
+    // At the moment, we only use one thread, so we can only stream one script
+    // at a time. TODO(marja): Use a thread pool and stream multiple scripts.

[haraken, 2014/08/17 16:05:27]

Nit: TODO(marja) => FIXME.

[marja, 2014/08/20 11:45:56]

Done.

+    WTF::OwnPtr<blink::WebThread> m_thread;
+    bool m_runningTask;
+};
+
+class ScriptStreamingTask : public WebThread::Task {
+public:
+    ScriptStreamingTask(v8::ScriptCompiler::ScriptStreamingTask*, V8ScriptStreamer*);
+    virtual void run() OVERRIDE;
+
+private:
+    WTF::OwnPtr<v8::ScriptCompiler::ScriptStreamingTask> m_v8Task;
+    V8ScriptStreamer* m_streamer;
+};
+
+
+} // namespace blink
+
+#endif // V8ScriptStreamerThread_h