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Diffstat (limited to 'third_party/protobuf/3.0.0/src/google/protobuf/stubs/once_unittest.cc')
-rw-r--r-- | third_party/protobuf/3.0.0/src/google/protobuf/stubs/once_unittest.cc | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/stubs/once_unittest.cc b/third_party/protobuf/3.0.0/src/google/protobuf/stubs/once_unittest.cc new file mode 100644 index 0000000000..37def58d03 --- /dev/null +++ b/third_party/protobuf/3.0.0/src/google/protobuf/stubs/once_unittest.cc @@ -0,0 +1,255 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// 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. + +// Author: kenton@google.com (Kenton Varda) + +#ifdef _WIN32 +#include <windows.h> +#else +#include <unistd.h> +#include <pthread.h> +#endif + +#include <google/protobuf/stubs/once.h> +#include <google/protobuf/testing/googletest.h> +#include <gtest/gtest.h> + +namespace google { +namespace protobuf { +using internal::NewCallback; +namespace { + +class OnceInitTest : public testing::Test { + protected: + void SetUp() { + state_ = INIT_NOT_STARTED; + current_test_ = this; + } + + // Since ProtobufOnceType is only allowed to be allocated in static storage, + // each test must use a different pair of ProtobufOnceType objects which it + // must declare itself. + void SetOnces(ProtobufOnceType* once, ProtobufOnceType* recursive_once) { + once_ = once; + recursive_once_ = recursive_once; + } + + void InitOnce() { + GoogleOnceInit(once_, &InitStatic); + } + void InitRecursiveOnce() { + GoogleOnceInit(recursive_once_, &InitRecursiveStatic); + } + + void BlockInit() { init_blocker_.Lock(); } + void UnblockInit() { init_blocker_.Unlock(); } + + class TestThread { + public: + TestThread(Closure* callback) + : done_(false), joined_(false), callback_(callback) { +#ifdef _WIN32 + thread_ = CreateThread(NULL, 0, &Start, this, 0, NULL); +#else + pthread_create(&thread_, NULL, &Start, this); +#endif + } + ~TestThread() { + if (!joined_) Join(); + } + + bool IsDone() { + MutexLock lock(&done_mutex_); + return done_; + } + void Join() { + joined_ = true; +#ifdef _WIN32 + WaitForSingleObject(thread_, INFINITE); + CloseHandle(thread_); +#else + pthread_join(thread_, NULL); +#endif + } + + private: +#ifdef _WIN32 + HANDLE thread_; +#else + pthread_t thread_; +#endif + + Mutex done_mutex_; + bool done_; + bool joined_; + Closure* callback_; + +#ifdef _WIN32 + static DWORD WINAPI Start(LPVOID arg) { +#else + static void* Start(void* arg) { +#endif + reinterpret_cast<TestThread*>(arg)->Run(); + return 0; + } + + void Run() { + callback_->Run(); + MutexLock lock(&done_mutex_); + done_ = true; + } + }; + + TestThread* RunInitOnceInNewThread() { + return new TestThread(internal::NewCallback(this, &OnceInitTest::InitOnce)); + } + TestThread* RunInitRecursiveOnceInNewThread() { + return new TestThread( + internal::NewCallback(this, &OnceInitTest::InitRecursiveOnce)); + } + + enum State { + INIT_NOT_STARTED, + INIT_STARTED, + INIT_DONE + }; + State CurrentState() { + MutexLock lock(&mutex_); + return state_; + } + + void WaitABit() { +#ifdef _WIN32 + Sleep(1000); +#else + sleep(1); +#endif + } + + private: + Mutex mutex_; + Mutex init_blocker_; + State state_; + ProtobufOnceType* once_; + ProtobufOnceType* recursive_once_; + + void Init() { + MutexLock lock(&mutex_); + EXPECT_EQ(INIT_NOT_STARTED, state_); + state_ = INIT_STARTED; + mutex_.Unlock(); + init_blocker_.Lock(); + init_blocker_.Unlock(); + mutex_.Lock(); + state_ = INIT_DONE; + } + + static OnceInitTest* current_test_; + static void InitStatic() { current_test_->Init(); } + static void InitRecursiveStatic() { current_test_->InitOnce(); } +}; + +OnceInitTest* OnceInitTest::current_test_ = NULL; + +GOOGLE_PROTOBUF_DECLARE_ONCE(simple_once); + +TEST_F(OnceInitTest, Simple) { + SetOnces(&simple_once, NULL); + + EXPECT_EQ(INIT_NOT_STARTED, CurrentState()); + InitOnce(); + EXPECT_EQ(INIT_DONE, CurrentState()); + + // Calling again has no effect. + InitOnce(); + EXPECT_EQ(INIT_DONE, CurrentState()); +} + +GOOGLE_PROTOBUF_DECLARE_ONCE(recursive_once1); +GOOGLE_PROTOBUF_DECLARE_ONCE(recursive_once2); + +TEST_F(OnceInitTest, Recursive) { + SetOnces(&recursive_once1, &recursive_once2); + + EXPECT_EQ(INIT_NOT_STARTED, CurrentState()); + InitRecursiveOnce(); + EXPECT_EQ(INIT_DONE, CurrentState()); +} + +GOOGLE_PROTOBUF_DECLARE_ONCE(multiple_threads_once); + +TEST_F(OnceInitTest, MultipleThreads) { + SetOnces(&multiple_threads_once, NULL); + + scoped_ptr<TestThread> threads[4]; + EXPECT_EQ(INIT_NOT_STARTED, CurrentState()); + for (int i = 0; i < 4; i++) { + threads[i].reset(RunInitOnceInNewThread()); + } + for (int i = 0; i < 4; i++) { + threads[i]->Join(); + } + EXPECT_EQ(INIT_DONE, CurrentState()); +} + +GOOGLE_PROTOBUF_DECLARE_ONCE(multiple_threads_blocked_once1); +GOOGLE_PROTOBUF_DECLARE_ONCE(multiple_threads_blocked_once2); + +TEST_F(OnceInitTest, MultipleThreadsBlocked) { + SetOnces(&multiple_threads_blocked_once1, &multiple_threads_blocked_once2); + + scoped_ptr<TestThread> threads[8]; + EXPECT_EQ(INIT_NOT_STARTED, CurrentState()); + + BlockInit(); + for (int i = 0; i < 4; i++) { + threads[i].reset(RunInitOnceInNewThread()); + } + for (int i = 4; i < 8; i++) { + threads[i].reset(RunInitRecursiveOnceInNewThread()); + } + + WaitABit(); + + // We should now have one thread blocked inside Init(), four blocked waiting + // for Init() to complete, and three blocked waiting for InitRecursive() to + // complete. + EXPECT_EQ(INIT_STARTED, CurrentState()); + UnblockInit(); + + for (int i = 0; i < 8; i++) { + threads[i]->Join(); + } + EXPECT_EQ(INIT_DONE, CurrentState()); +} + +} // anonymous namespace +} // namespace protobuf +} // namespace google |