Added a wait with timeout to the platform semaphore class

test/cctest/test-lock.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 //
 // Tests of the TokenLock class from lock.h
 
 #include <stdlib.h>
 
 #include "v8.h"
 
 #include "platform.h"
 #include "cctest.h"
@@ skipping 20 matching lines @@
 
 
 TEST(ShallowLock) {
   Mutex* mutex = OS::CreateMutex();
   CHECK_EQ(0, mutex->Lock());
   CHECK_EQ(0, mutex->Unlock());
   CHECK_EQ(0, mutex->Lock());
   CHECK_EQ(0, mutex->Unlock());
   delete mutex;
 }
+
+
+TEST(SemaphoreTimeout) {
+  bool ok;
+  Semaphore* sem = OS::CreateSemaphore(0);
+
+  // Semaphore not signalled - timeout.
+  ok = sem->Wait(0);
+  CHECK(!ok);
+  ok = sem->Wait(100);
+  CHECK(!ok);
+  ok = sem->Wait(1000);
+  CHECK(!ok);
+
+  // Semaphore signalled - no timeout.
+  sem->Signal();
+  ok = sem->Wait(0);
+  sem->Signal();
+  ok = sem->Wait(100);
+  sem->Signal();
+  ok = sem->Wait(1000);
+  CHECK(ok);
+}