| // Copyright 2023 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "dawn/common/Mutex.h" |
| #include "gtest/gtest.h" |
| |
| namespace dawn { |
| namespace { |
| |
| #if defined(DAWN_ENABLE_ASSERTS) |
| constexpr bool kAssertEnabled = true; |
| #else |
| constexpr bool kAssertEnabled = false; |
| #endif |
| |
| class MutexTest : public ::testing::Test { |
| protected: |
| void SetUp() override { |
| // IsLockedByCurrentThread() requires DAWN_ENABLE_ASSERTS flag enabled. |
| if (!kAssertEnabled) { |
| GTEST_SKIP() << "DAWN_ENABLE_ASSERTS is not enabled"; |
| } |
| } |
| |
| Mutex mMutex; |
| }; |
| |
| // Simple Lock() then Unlock() test. |
| TEST_F(MutexTest, SimpleLockUnlock) { |
| mMutex.Lock(); |
| EXPECT_TRUE(mMutex.IsLockedByCurrentThread()); |
| mMutex.Unlock(); |
| EXPECT_FALSE(mMutex.IsLockedByCurrentThread()); |
| } |
| |
| // Test AutoLock automatically locks the mutex and unlocks it when out of scope. |
| TEST_F(MutexTest, AutoLock) { |
| { |
| Mutex::AutoLock autoLock(&mMutex); |
| EXPECT_TRUE(mMutex.IsLockedByCurrentThread()); |
| } |
| EXPECT_FALSE(mMutex.IsLockedByCurrentThread()); |
| } |
| |
| // Test AutoLockAndHoldRef will keep the mutex alive |
| TEST_F(MutexTest, AutoLockAndHoldRef) { |
| auto* mutex = new Mutex(); |
| EXPECT_EQ(mutex->GetRefCountForTesting(), 1u); |
| { |
| Mutex::AutoLockAndHoldRef autoLock(mutex); |
| EXPECT_TRUE(mutex->IsLockedByCurrentThread()); |
| EXPECT_EQ(mutex->GetRefCountForTesting(), 2u); |
| |
| mutex->Release(); |
| EXPECT_EQ(mutex->GetRefCountForTesting(), 1u); |
| } |
| } |
| |
| using MutexDeathTest = MutexTest; |
| |
| // Test that Unlock() call on unlocked mutex will cause assertion failure. |
| TEST_F(MutexDeathTest, UnlockWhenNotLocked) { |
| ASSERT_DEATH({ mMutex.Unlock(); }, ""); |
| } |
| |
| // Double Lock() calls should be cause assertion failure |
| TEST_F(MutexDeathTest, DoubleLockCalls) { |
| mMutex.Lock(); |
| EXPECT_TRUE(mMutex.IsLockedByCurrentThread()); |
| ASSERT_DEATH({ mMutex.Lock(); }, ""); |
| mMutex.Unlock(); |
| } |
| |
| // Lock() then use AutoLock should cause assertion failure. |
| TEST_F(MutexDeathTest, LockThenAutoLock) { |
| mMutex.Lock(); |
| EXPECT_TRUE(mMutex.IsLockedByCurrentThread()); |
| ASSERT_DEATH({ Mutex::AutoLock autoLock(&mMutex); }, ""); |
| mMutex.Unlock(); |
| } |
| |
| // Use AutoLock then call Lock() should cause assertion failure. |
| TEST_F(MutexDeathTest, AutoLockThenLock) { |
| Mutex::AutoLock autoLock(&mMutex); |
| EXPECT_TRUE(mMutex.IsLockedByCurrentThread()); |
| ASSERT_DEATH({ mMutex.Lock(); }, ""); |
| } |
| |
| } // anonymous namespace |
| } // namespace dawn |