[platform] Implement a worker pool

test/cctest/test-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
@@ skipping 10 matching lines @@
 // 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 "v8.h"
 
 #include "cctest.h"
-#include "cpu.h"
+#include "libplatform/task-queue.h"
+#include "libplatform/worker-thread.h"
+#include "test-libplatform.h"
 
 using namespace v8::internal;
 
 
-TEST(FeatureImplications) {
-  // Test for features implied by other features.
-  CPU cpu;
+TEST(WorkerThread) {
+  TaskQueue queue;
+  TaskCounter task_counter;
 
-  // 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());
+  TestTask* task1 = new TestTask(&task_counter, true);
+  TestTask* task2 = new TestTask(&task_counter, true);
+  TestTask* task3 = new TestTask(&task_counter, true);
+  TestTask* task4 = new TestTask(&task_counter, true);
 
-  // arm features
-  CHECK(!cpu.has_vfp3_d32() || cpu.has_vfp3());
+  WorkerThread* thread1 = new WorkerThread(&queue);
+  WorkerThread* thread2 = new WorkerThread(&queue);
+
+  CHECK_EQ(4, task_counter.GetCount());
+
+  queue.Append(task1);
+  queue.Append(task2);
+  queue.Append(task3);
+  queue.Append(task4);
+
+  // TaskQueue ASSERTs that it is empty in its destructor.
+  queue.Terminate();
+
+  delete thread1;
+  delete thread2;
+
+  CHECK_EQ(0, task_counter.GetCount());
 }
-
-
-TEST(NumberOfProcessorsOnline) {
-  CHECK_GT(CPU::NumberOfProcessorsOnline(), 0);
-}