[platform] Implement a worker pool

src/libplatform/worker-thread.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 // OWNER 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.
 
-#ifndef V8_HYDROGEN_BCH_H_
-#define V8_HYDROGEN_BCH_H_
+#include "worker-thread.h"
 
-#include "hydrogen.h"
+// TODO(jochen): We should have our own version of checks.h.
+#include "../checks.h"
+#include "../../include/v8-platform.h"
+#include "task-queue.h"
 
 namespace v8 {
 namespace internal {
 
-
-class HBoundsCheckHoistingPhase : public HPhase {
- public:
-  explicit HBoundsCheckHoistingPhase(HGraph* graph)
-      : HPhase("H_Bounds checks hoisting", graph) { }
-
-  void Run() {
-    HoistRedundantBoundsChecks();
-  }
-
- private:
-  void HoistRedundantBoundsChecks();
-
-  DISALLOW_COPY_AND_ASSIGN(HBoundsCheckHoistingPhase);
-};
+WorkerThread::WorkerThread(TaskQueue* queue)
+    : Thread("V8 WorkerThread"), queue_(queue) {
+  Start();
+}
 
 
+WorkerThread::~WorkerThread() {
+  Join();
+}
+
+
+void WorkerThread::Run() {
+  while (Task* task = queue_->GetNext()) {
+    task->Run();
+    delete task;
+  }
+}
+
 } }  // namespace v8::internal
-
-#endif  // V8_HYDROGEN_BCE_H_