Adds new class AtExitManager which manages the dtors of all singletons.

- Previously this job was done by the CRT's atexit() which runs later than we want and under the loader lock.
- Had to modify most main() functions for the testing executables so we don't trigger leak detectors.



git-svn-id: svn://svn.chromium.org/chrome/trunk/src@219 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 82 insertions, 0 deletions

diff --git a/base/at_exit_unittest.cc b/base/at_exit_unittest.cc
new file mode 100644
index 0000000..692ce66
--- /dev/null
+++ b/base/at_exit_unittest.cc
@@ -0,0 +1,82 @@
+// Copyright 2008, Google Inc.
+// 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.
+
+#include "base/at_exit.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+int g_test_counter_1 = 0;
+int g_test_counter_2 = 0;
+
+void IncrementTestCounter1() {
+  ++g_test_counter_1;
+}
+
+void IncrementTestCounter2() {
+  ++g_test_counter_2;
+}
+
+void ZeroTestCounters() {
+  g_test_counter_1 = 0;
+  g_test_counter_2 = 0;
+}
+
+void ExpectCounter1IsZero() {
+  EXPECT_EQ(0, g_test_counter_1);
+}
+
+}  // namespace
+
+TEST(AtExitTest, Basic) {
+  ZeroTestCounters();
+  base::AtExitManager::RegisterCallback(&IncrementTestCounter1);
+  base::AtExitManager::RegisterCallback(&IncrementTestCounter2);
+  base::AtExitManager::RegisterCallback(&IncrementTestCounter1);
+  
+  EXPECT_EQ(0, g_test_counter_1);
+  EXPECT_EQ(0, g_test_counter_2);
+  base::AtExitManager::ProcessCallbacksNow();
+  EXPECT_EQ(2, g_test_counter_1);
+  EXPECT_EQ(1, g_test_counter_2);
+}
+
+TEST(AtExitTest, LIFOOrder) {
+  ZeroTestCounters();
+  base::AtExitManager::RegisterCallback(&IncrementTestCounter1);
+  base::AtExitManager::RegisterCallback(&ExpectCounter1IsZero);
+  base::AtExitManager::RegisterCallback(&IncrementTestCounter2);
+  
+  EXPECT_EQ(0, g_test_counter_1);
+  EXPECT_EQ(0, g_test_counter_2);
+  base::AtExitManager::ProcessCallbacksNow();
+  EXPECT_EQ(1, g_test_counter_1);
+  EXPECT_EQ(1, g_test_counter_2);
+}