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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 "mutex.h"
#include "gtest/gtest.h"
namespace art {
struct MutexTester {
static void AssertDepth(Mutex& mu, uint32_t expected_depth) {
ASSERT_EQ(expected_depth, mu.GetDepth());
// This test is single-threaded, so we also know _who_ should hold the lock.
if (expected_depth == 0) {
mu.AssertNotHeld();
} else {
mu.AssertHeld();
}
}
};
TEST(Mutex, LockUnlock) {
Mutex mu("test mutex");
MutexTester::AssertDepth(mu, 0U);
mu.Lock();
MutexTester::AssertDepth(mu, 1U);
mu.Unlock();
MutexTester::AssertDepth(mu, 0U);
}
TEST(Mutex, TryLockUnlock) {
Mutex mu("test mutex");
MutexTester::AssertDepth(mu, 0U);
bool locked = mu.TryLock();
ASSERT_TRUE(locked);
if (locked) { // Keep GCC happy.
MutexTester::AssertDepth(mu, 1U);
mu.Unlock();
MutexTester::AssertDepth(mu, 0U);
}
}
// GCC doesn't get recursive mutexes, so we have to turn off thread safety analysis.
static void RecursiveLockUnlockTest() NO_THREAD_SAFETY_ANALYSIS {
Mutex mu("test mutex");
MutexTester::AssertDepth(mu, 0U);
mu.Lock();
MutexTester::AssertDepth(mu, 1U);
mu.Lock();
MutexTester::AssertDepth(mu, 2U);
mu.Unlock();
MutexTester::AssertDepth(mu, 1U);
mu.Unlock();
MutexTester::AssertDepth(mu, 0U);
}
TEST(Mutex, RecursiveLockUnlock) {
RecursiveLockUnlockTest();
}
// GCC doesn't get recursive mutexes, so we have to turn off thread safety analysis.
static void RecursiveTryLockUnlockTest() NO_THREAD_SAFETY_ANALYSIS {
Mutex mu("test mutex");
MutexTester::AssertDepth(mu, 0U);
ASSERT_TRUE(mu.TryLock());
MutexTester::AssertDepth(mu, 1U);
ASSERT_TRUE(mu.TryLock());
MutexTester::AssertDepth(mu, 2U);
mu.Unlock();
MutexTester::AssertDepth(mu, 1U);
mu.Unlock();
MutexTester::AssertDepth(mu, 0U);
}
TEST(Mutex, RecursiveTryLockUnlock) {
RecursiveTryLockUnlockTest();
}
} // namespace art
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