| /* |
| * Copyright (C) 2016 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 "common/libs/threads/cuttlefish_thread.h" |
| |
| #include <gtest/gtest.h> |
| |
| #include <android-base/logging.h> |
| #include "common/libs/threads/thunkers.h" |
| #include "common/libs/time/monotonic_time.h" |
| |
| using cvd::ConditionVariable; |
| using cvd::Mutex; |
| using cvd::ScopedThread; |
| using cvd::time::MonotonicTimePoint; |
| using cvd::time::Milliseconds; |
| |
| static const int FINISHED = 100; |
| |
| static void SleepUntil(const MonotonicTimePoint& in) { |
| struct timespec ts; |
| in.ToTimespec(&ts); |
| #ifdef CLOCK_MONOTONIC_RAW |
| // WARNING: |
| // While we do have CLOCK_MONOTONIC_RAW, we can't depend on it until: |
| // - ALL places relying on MonotonicTimePoint are fixed, |
| // - pthread supports pthread_timewait_monotonic. |
| // - CLOCK_MONOTONIC_RAW is re-enabled in monotonic_time.h. |
| // |
| // This is currently observable as a LEGITIMATE problem while running |
| // this test. DO NOT revert this to CLOCK_MONOTONIC_RAW until this is |
| // fixed everywhere AND this test passes. |
| clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts, NULL); |
| #else |
| clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &ts, NULL); |
| #endif |
| } |
| |
| class MutexTest { |
| public: |
| MutexTest() : busy_(NULL), stage_(0) {} |
| |
| void Run() { |
| { |
| ScopedThread thread_a(cvd::thunk<void, &MutexTest::FastThread>, this); |
| ScopedThread thread_b(cvd::thunk<void, &MutexTest::SlowThread>, this); |
| } |
| LOG(INFO) << "MutexTest: completed at stage " |
| << stage_ |
| << ", result: " |
| << ((stage_ == FINISHED) ? "PASSED" : "FAILED"); |
| } |
| |
| protected: |
| void* FastThread() { |
| mutex_.Lock(); |
| CHECK(busy_ == NULL); |
| busy_ = "FastThread"; |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(100)); |
| stage_ = 1; |
| busy_ = NULL; |
| mutex_.Unlock(); |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(10)); |
| mutex_.Lock(); |
| CHECK(busy_ == NULL); |
| busy_ = "FastThread"; |
| CHECK(stage_ == 2); |
| stage_ = FINISHED; |
| busy_ = NULL; |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| void* SlowThread() { |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(50)); |
| mutex_.Lock(); |
| CHECK(busy_== NULL); |
| busy_ = "SlowThread"; |
| CHECK(stage_ == 1); |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(100)); |
| stage_ = 2; |
| busy_ = NULL; |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| Mutex mutex_; |
| const char* busy_; |
| int stage_; |
| }; |
| |
| class NotifyOneTest { |
| public: |
| NotifyOneTest() : cond_(&mutex_), signalled_(0) {} |
| |
| void Run() { |
| { |
| ScopedThread thread_s( |
| cvd::thunk<void, &NotifyOneTest::SignalThread>, this); |
| ScopedThread thread_w1( |
| cvd::thunk<void, &NotifyOneTest::WaitThread>, this); |
| ScopedThread thread_w2( |
| cvd::thunk<void, &NotifyOneTest::WaitThread>, this); |
| } |
| LOG(INFO) << "NotifyOneTest: completed, signalled " |
| << signalled_ |
| << ", result: " |
| << ((signalled_ == 2) ? "PASSED" : "FAILED"); |
| } |
| |
| protected: |
| void* SignalThread() { |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(100)); |
| mutex_.Lock(); |
| cond_.NotifyOne(); |
| mutex_.Unlock(); |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(100)); |
| mutex_.Lock(); |
| CHECK(signalled_== 1); |
| cond_.NotifyOne(); |
| mutex_.Unlock(); |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(100)); |
| mutex_.Lock(); |
| CHECK(signalled_ == 2); |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| void* WaitThread() { |
| mutex_.Lock(); |
| cond_.Wait(); |
| signalled_++; |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| Mutex mutex_; |
| ConditionVariable cond_; |
| int signalled_; |
| }; |
| |
| class NotifyAllTest { |
| public: |
| NotifyAllTest() : cond_(&mutex_), signalled_(0) {} |
| |
| void Run() { |
| { |
| ScopedThread thread_s( |
| cvd::thunk<void, &NotifyAllTest::SignalThread>, this); |
| ScopedThread thread_w1( |
| cvd::thunk<void, &NotifyAllTest::WaitThread>, this); |
| ScopedThread thread_w2( |
| cvd::thunk<void, &NotifyAllTest::WaitThread>, this); |
| } |
| printf("NotifyAllTest: completed, signalled %d (%s)\n", |
| signalled_, (signalled_ == 2) ? "PASSED" : "FAILED"); |
| } |
| |
| protected: |
| void* SignalThread() { |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(100)); |
| mutex_.Lock(); |
| cond_.NotifyAll(); |
| mutex_.Unlock(); |
| SleepUntil(MonotonicTimePoint::Now() + Milliseconds(100)); |
| mutex_.Lock(); |
| CHECK(signalled_ == 2); |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| void* WaitThread() { |
| mutex_.Lock(); |
| cond_.Wait(); |
| signalled_++; |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| Mutex mutex_; |
| ConditionVariable cond_; |
| int signalled_; |
| }; |
| |
| class WaitUntilTest { |
| public: |
| WaitUntilTest() : cond_(&mutex_), stage_(0) {} |
| |
| bool Run() { |
| start_ = MonotonicTimePoint::Now(); |
| { |
| ScopedThread thread_s( |
| cvd::thunk<void, &WaitUntilTest::SignalThread>, this); |
| ScopedThread thread_w2( |
| cvd::thunk<void, &WaitUntilTest::WaitThread>, this); |
| } |
| printf("WaitUntilTest: completed, stage %d (%s)\n", |
| stage_, (stage_ == FINISHED) ? "PASSED" : "FAILED"); |
| return stage_ == FINISHED; |
| } |
| |
| protected: |
| void* SignalThread() { |
| SleepUntil(start_ + Milliseconds(200)); |
| mutex_.Lock(); |
| CHECK(stage_ == 2); |
| cond_.NotifyOne(); |
| stage_ = 3; |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| void* WaitThread() { |
| mutex_.Lock(); |
| CHECK(stage_ == 0); |
| stage_ = 1; |
| cond_.WaitUntil(start_ + Milliseconds(50)); |
| MonotonicTimePoint current(MonotonicTimePoint::Now()); |
| CHECK(Milliseconds(current - start_).count() >= 50); |
| CHECK(Milliseconds(current - start_).count() <= 100); |
| stage_ = 2; |
| cond_.WaitUntil(start_ + Milliseconds(1000)); |
| current = MonotonicTimePoint::Now(); |
| CHECK(Milliseconds(current - start_).count() <= 500); |
| CHECK(stage_ == 3); |
| stage_ = FINISHED; |
| mutex_.Unlock(); |
| return NULL; |
| } |
| |
| Mutex mutex_; |
| ConditionVariable cond_; |
| int stage_; |
| MonotonicTimePoint start_; |
| }; |
| |
| TEST(ThreadTest, Mutex) { |
| MutexTest mt; |
| mt.Run(); |
| NotifyOneTest nt1; |
| nt1.Run(); |
| NotifyAllTest nta; |
| nta.Run(); |
| WaitUntilTest wu; |
| bool success = wu.Run(); |
| EXPECT_TRUE(success); |
| } |