Add multi_process_lock to chrome/common

base/shared_mutex_unittest.cc

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/basictypes.h"
+#include "base/shared_mutex.h"
+#include "base/test/multiprocess_test.h"
+#include "testing/multiprocess_func_list.h"
+
+namespace base {
+
+namespace {
+  const char kMutexName[] = "shared_mutex_unittest";

[agl, 2010/11/08 23:57:49]

just make it static for a single constant.

[Mark Mentovai, 2010/11/09 17:43:14]

Don’t indent namespace contents.

[dmac, 2010/11/11 21:47:59]

Done.

[dmac, 2010/11/11 21:47:59]

Done.

+}

[Mark Mentovai, 2010/11/09 17:43:14]

}  // namespace

[dmac, 2010/11/11 21:47:59]

Done.

+
+class SharedMutexTest : public base::MultiProcessTest {
+};
+
+TEST_F(SharedMutexTest, SimpleLock) {
+  SharedMutex test_mutex(kMutexName);
+  EXPECT_TRUE(test_mutex.TryLock());
+  base::ProcessHandle handle = SpawnChild("SharedMutexTryFailMain", false);
+  ASSERT_TRUE(handle);
+  int exit_code = 0;
+  EXPECT_TRUE(base::WaitForExitCode(handle, &exit_code));
+  EXPECT_EQ(exit_code, 0);
+  test_mutex.Unlock();
+  handle = SpawnChild("SharedMutexTrySucceedMain", false);
+  ASSERT_TRUE(handle);
+  EXPECT_TRUE(base::WaitForExitCode(handle, &exit_code));
+  EXPECT_EQ(exit_code, 0);
+}
+
+MULTIPROCESS_TEST_MAIN(SharedMutexTryFailMain) {
+  SharedMutex test_mutex(kMutexName);
+  EXPECT_FALSE(test_mutex.TryLock());
+  return 0;
+}
+
+
+MULTIPROCESS_TEST_MAIN(SharedMutexTrySucceedMain) {
+  SharedMutex test_mutex(kMutexName);
+  EXPECT_TRUE(test_mutex.TryLock());
+  return 0;
+}
+
+}  // namespace base