Simplify implementation of Mutex.

test/cctest/test-mutex.cc

+// Copyright 2006-2013 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.
+//
+// Tests of the Mutex class from mutex.h
+
+#include "v8.h"
+
+#include "mutex.h"
+#include "cctest.h"
+
+
+using namespace ::v8::internal;
+
+
+TEST(Simple) {
+  Mutex mutex;
+  mutex.Lock();
+  mutex.Unlock();
+}
+
+
+TEST(Recursive) {
+  Mutex mutex;
+  mutex.Lock();
+  mutex.Lock();
+  mutex.Unlock();
+  mutex.Unlock();
+}
+
+
+TEST(SimpleScopedLock) {
+  Mutex mutex;
+  {
+    ScopedLock fst(&mutex);
+  }
+  {
+    ScopedLock snd(&mutex);
+  }
+}
+
+
+TEST(RecursiveScopedLock) {
+  Mutex mutex;
+  ScopedLock fst(&mutex);
+  ScopedLock snd(&mutex);
+}