[platform] Implement a worker pool

test/cctest/test-libplatform-task-queue.cc

Index: test/cctest/test-libplatform-task-queue.cc
diff --git a/test/cctest/test-cpu.cc b/test/cctest/test-libplatform-task-queue.cc
similarity index 58%
copy from test/cctest/test-cpu.cc
copy to test/cctest/test-libplatform-task-queue.cc
index 06966c68c86296e510edb8899f4d7deb0343f108..e9fafe2cecde1e6f5e04890d3f4c85cf443e68ba 100644
--- a/test/cctest/test-cpu.cc
+++ b/test/cctest/test-libplatform-task-queue.cc
@@ -28,28 +28,68 @@
 #include "v8.h"
 
 #include "cctest.h"
-#include "cpu.h"
+#include "libplatform/task-queue.h"
+#include "test-libplatform.h"
 
 using namespace v8::internal;
 
 
-TEST(FeatureImplications) {
-  // Test for features implied by other features.
-  CPU cpu;
+TEST(TaskQueueBasic) {
+  int task_counter = 0;
 
-  // ia32 and x64 features
-  CHECK(!cpu.has_sse() || cpu.has_mmx());
-  CHECK(!cpu.has_sse2() || cpu.has_sse());
-  CHECK(!cpu.has_sse3() || cpu.has_sse2());
-  CHECK(!cpu.has_ssse3() || cpu.has_sse3());
-  CHECK(!cpu.has_sse41() || cpu.has_sse3());
-  CHECK(!cpu.has_sse42() || cpu.has_sse41());
+  TaskQueue queue;
 
-  // arm features
-  CHECK(!cpu.has_vfp3_d32() || cpu.has_vfp3());
+  TestTask* task = new TestTask(&task_counter);
+  queue.Append(task);
+  CHECK_EQ(1, task_counter);
+  CHECK_EQ(task, queue.GetNext());
+  delete task;
+  CHECK_EQ(0, task_counter);
+
+  queue.Terminate();
+  CHECK_EQ(NULL, queue.GetNext());
 }
 
 
-TEST(NumberOfProcessorsOnline) {
-  CHECK_GT(CPU::NumberOfProcessorsOnline(), 0);
+class ReadQueueTask : public TestTask {
+ public:
+  ReadQueueTask(int* task_counter, TaskQueue* queue)
+      : TestTask(task_counter, true), queue_(queue) {}
+  virtual ~ReadQueueTask() {}
+
+  virtual void Run() V8_OVERRIDE {
+    TestTask::Run();
+    CHECK_EQ(NULL, queue_->GetNext());
+  }
+
+ private:
+  TaskQueue* queue_;
+
+  DISALLOW_COPY_AND_ASSIGN(ReadQueueTask);
+};
+
+
+TEST(TaskQueueTerminateMultipleReaders) {
+  TaskQueue queue;
+  int task_counter = 0;
+  ReadQueueTask* read1 = new ReadQueueTask(&task_counter, &queue);
+  ReadQueueTask* read2 = new ReadQueueTask(&task_counter, &queue);
+
+  TestThread thread1(read1);
+  TestThread thread2(read2);
+
+  thread1.Start();
+  thread2.Start();
+
+  CHECK_EQ(2, task_counter);
+
+  thread1.Signal();
+  thread2.Signal();
+
+  queue.Terminate();
+
+  thread1.Join();
+  thread2.Join();
+
+  CHECK_EQ(0, task_counter);
 }