| // Copyright 2020 The Pigweed 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 |
| // |
| // https://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 <chrono> |
| |
| #include "gtest/gtest.h" |
| #include "pw_chrono/system_clock.h" |
| #include "pw_sync/mutex.h" |
| |
| using pw::chrono::SystemClock; |
| |
| namespace pw::sync { |
| namespace { |
| |
| extern "C" { |
| |
| // Functions defined in mutex_facade_test_c.c which call the API from C. |
| void pw_sync_Mutex_CallLock(pw_sync_Mutex* mutex); |
| bool pw_sync_Mutex_CallTryLock(pw_sync_Mutex* mutex); |
| bool pw_sync_Mutex_CallTryLockFor(pw_sync_Mutex* mutex, |
| pw_chrono_SystemClock_TickCount for_at_least); |
| bool pw_sync_Mutex_CallTryLockUntil( |
| pw_sync_Mutex* mutex, pw_chrono_SystemClock_TimePoint until_at_least); |
| void pw_sync_Mutex_CallUnlock(pw_sync_Mutex* mutex); |
| |
| } // extern "C" |
| |
| static constexpr auto kArbitraryDuration = std::chrono::milliseconds(42); |
| // We can't control the SystemClock's period configuration, so just in case |
| // duration cannot be accurately expressed in integer ticks, round the |
| // duration w/ duration_cast. |
| static constexpr auto kRoundedArbitraryDuration = |
| std::chrono::duration_cast<SystemClock::duration>(kArbitraryDuration); |
| static constexpr pw_chrono_SystemClock_TickCount kRoundedArbitraryDurationInC = |
| kRoundedArbitraryDuration.count(); |
| |
| // TODO(pwbug/291): Add real concurrency tests once we have pw::thread. |
| |
| TEST(Mutex, LockUnlock) { |
| pw::sync::Mutex mutex; |
| mutex.lock(); |
| // TODO(pwbug/291): Ensure it fails to lock when already held. |
| // EXPECT_FALSE(mutex.try_lock()); |
| mutex.unlock(); |
| } |
| |
| Mutex static_mutex; |
| TEST(Mutex, LockUnlockStatic) { |
| static_mutex.lock(); |
| // TODO(pwbug/291): Ensure it fails to lock when already held. |
| // EXPECT_FALSE(static_mutex.try_lock()); |
| static_mutex.unlock(); |
| } |
| |
| TEST(Mutex, TryLockUnlock) { |
| pw::sync::Mutex mutex; |
| ASSERT_TRUE(mutex.try_lock()); |
| // TODO(pwbug/291): Ensure it fails to lock when already held. |
| // EXPECT_FALSE(mutex.try_lock()); |
| mutex.unlock(); |
| } |
| |
| TEST(Mutex, TryLockUnlockFor) { |
| pw::sync::Mutex mutex; |
| |
| SystemClock::time_point before = SystemClock::now(); |
| ASSERT_TRUE(mutex.try_lock_for(kRoundedArbitraryDuration)); |
| SystemClock::duration time_elapsed = SystemClock::now() - before; |
| EXPECT_LT(time_elapsed, kRoundedArbitraryDuration); |
| |
| // TODO(pwbug/291): Ensure it blocks fails to lock when already held. |
| // before = SystemClock::now(); |
| // EXPECT_FALSE(mutex.try_lock_for(kRoundedArbitraryDuration)); |
| // time_elapsed = SystemClock::now() - before; |
| /// EXPECT_GE(time_elapsed, kRoundedArbitraryDuration); |
| |
| mutex.unlock(); |
| } |
| |
| TEST(Mutex, TryLockUnlockUntil) { |
| pw::sync::Mutex mutex; |
| |
| const SystemClock::time_point deadline = |
| SystemClock::now() + kRoundedArbitraryDuration; |
| ASSERT_TRUE(mutex.try_lock_until(deadline)); |
| EXPECT_LT(SystemClock::now(), deadline); |
| |
| // TODO(pwbug/291): Ensure it blocks fails to lock when already held. |
| // EXPECT_FALSE( |
| // mutex.try_lock_until(SystemClock::now() + kRoundedArbitraryDuration)); |
| // EXPECT_GE(SystemClock::now(), deadline); |
| |
| mutex.unlock(); |
| } |
| |
| TEST(Mutex, LockUnlockInC) { |
| pw::sync::Mutex mutex; |
| pw_sync_Mutex_CallLock(&mutex); |
| pw_sync_Mutex_CallUnlock(&mutex); |
| } |
| |
| TEST(Mutex, TryLockUnlockInC) { |
| pw::sync::Mutex mutex; |
| ASSERT_TRUE(pw_sync_Mutex_CallTryLock(&mutex)); |
| // TODO(pwbug/291): Ensure it fails to lock when already held. |
| // EXPECT_FALSE(pw_sync_Mutex_CallTryLock(&mutex)); |
| pw_sync_Mutex_CallUnlock(&mutex); |
| } |
| |
| TEST(Mutex, TryLockUnlockForInC) { |
| pw::sync::Mutex mutex; |
| |
| pw_chrono_SystemClock_TimePoint before = pw_chrono_SystemClock_Now(); |
| ASSERT_TRUE( |
| pw_sync_Mutex_CallTryLockFor(&mutex, kRoundedArbitraryDurationInC)); |
| pw_chrono_SystemClock_TickCount time_elapsed = |
| pw_chrono_SystemClock_Now().ticks_since_epoch - before.ticks_since_epoch; |
| EXPECT_LT(time_elapsed, kRoundedArbitraryDurationInC); |
| |
| // TODO(pwbug/291): Ensure it blocks fails to lock when already held. |
| // before = pw_chrono_SystemClock_Now(); |
| // EXPECT_FALSE( |
| // pw_sync_Mutex_CallTryLockFor(&mutex, kRoundedArbitraryDurationInC)); |
| // time_elapsed = |
| // pw_chrono_SystemClock_Now().ticks_since_epoch - |
| // before.ticks_since_epoch; |
| // EXPECT_GE(time_elapsed, kRoundedArbitraryDurationInC); |
| |
| pw_sync_Mutex_CallUnlock(&mutex); |
| } |
| |
| TEST(Mutex, TryLockUnlockUntilInC) { |
| pw::sync::Mutex mutex; |
| pw_chrono_SystemClock_TimePoint deadline; |
| deadline.ticks_since_epoch = pw_chrono_SystemClock_Now().ticks_since_epoch + |
| kRoundedArbitraryDurationInC; |
| ASSERT_TRUE(pw_sync_Mutex_CallTryLockUntil(&mutex, deadline)); |
| EXPECT_LT(pw_chrono_SystemClock_Now().ticks_since_epoch, |
| deadline.ticks_since_epoch); |
| |
| // TODO(pwbug/291): Ensure it blocks fails to lock when already held. |
| // EXPECT_FALSE(pw_sync_Mutex_CallTryLockUntil(&mutex, deadline)); |
| // EXPECT_GE(pw_chrono_SystemClock_Now().ticks_since_epoch, |
| // deadline.ticks_since_epoch); |
| |
| mutex.unlock(); |
| } |
| |
| } // namespace |
| } // namespace pw::sync |