A64: Synchronize with r18444.

src/libplatform/task-queue.cc

Index: src/libplatform/task-queue.cc
diff --git a/src/extensions/free-buffer-extension.cc b/src/libplatform/task-queue.cc
similarity index 63%
copy from src/extensions/free-buffer-extension.cc
copy to src/libplatform/task-queue.cc
index 5cf2b68146c9d325096b6f94172bca55d498c2fa..1ea31eb26e0aa700944fa9927e460ef73b5ae9fa 100644
--- a/src/extensions/free-buffer-extension.cc
+++ b/src/libplatform/task-queue.cc
@@ -25,36 +25,56 @@
 // (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 "free-buffer-extension.h"
-#include "platform.h"
-#include "v8.h"
+#include "task-queue.h"
+
+// TODO(jochen): We should have our own version of checks.h.
+#include "../checks.h"
 
 namespace v8 {
 namespace internal {
 
+TaskQueue::TaskQueue() : process_queue_semaphore_(0), terminated_(false) {}
+
 
-v8::Handle<v8::FunctionTemplate> FreeBufferExtension::GetNativeFunctionTemplate(
-    v8::Isolate* isolate,
-    v8::Handle<v8::String> str) {
-  return v8::FunctionTemplate::New(FreeBufferExtension::FreeBuffer);
+TaskQueue::~TaskQueue() {
+  LockGuard<Mutex> guard(&lock_);
+  ASSERT(terminated_);
+  ASSERT(task_queue_.empty());
 }
 
 
-void FreeBufferExtension::FreeBuffer(
-    const v8::FunctionCallbackInfo<v8::Value>& args) {
-  v8::Handle<v8::ArrayBuffer> arrayBuffer = args[0].As<v8::ArrayBuffer>();
-  v8::ArrayBuffer::Contents contents = arrayBuffer->Externalize();
-  V8::ArrayBufferAllocator()->Free(contents.Data(), contents.ByteLength());
+void TaskQueue::Append(Task* task) {
+  LockGuard<Mutex> guard(&lock_);
+  ASSERT(!terminated_);
+  task_queue_.push(task);
+  process_queue_semaphore_.Signal();
 }
 
 
-void FreeBufferExtension::Register() {
-  static char buffer[100];
-  Vector<char> temp_vector(buffer, sizeof(buffer));
-  OS::SNPrintF(temp_vector, "native function freeBuffer();");
+Task* TaskQueue::GetNext() {
+  for (;;) {
+    {
+      LockGuard<Mutex> guard(&lock_);
+      if (!task_queue_.empty()) {
+        Task* result = task_queue_.front();
+        task_queue_.pop();
+        return result;
+      }
+      if (terminated_) {
+        process_queue_semaphore_.Signal();
+        return NULL;
+      }
+    }
+    process_queue_semaphore_.Wait();
+  }
+}
+
 
-  static FreeBufferExtension buffer_free_extension(buffer);
-  static v8::DeclareExtension declaration(&buffer_free_extension);
+void TaskQueue::Terminate() {
+  LockGuard<Mutex> guard(&lock_);
+  ASSERT(!terminated_);
+  terminated_ = true;
+  process_queue_semaphore_.Signal();
 }
 
 } }  // namespace v8::internal