| // Copyright 2024 The Cobalt Authors. All Rights Reserved. |
| // |
| // 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 "starboard/configuration_constants.h" |
| #include "starboard/nplb/posix_compliance/posix_thread_helpers.h" |
| #include "starboard/thread.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace starboard { |
| namespace nplb { |
| namespace { |
| |
| void* PosixTakeThenSignalEntryPoint(void* context) { |
| posix::TakeThenSignalContext* test_context = |
| static_cast<posix::TakeThenSignalContext*>(context); |
| |
| // Don't signal the condition variable until we are asked. |
| test_context->do_signal.Take(); |
| |
| if (test_context->delay_after_signal > 0) { |
| SbThreadSleep(test_context->delay_after_signal); |
| } |
| |
| // Signal the condition variable. |
| EXPECT_EQ(pthread_mutex_lock(&test_context->mutex), 0); |
| EXPECT_TRUE(pthread_cond_signal(&test_context->condition)); |
| EXPECT_EQ(pthread_mutex_unlock(&test_context->mutex), 0); |
| |
| return NULL; |
| } |
| |
| TEST(PosixConditionVariableWaitTest, SunnyDayAutoInit) { |
| posix::TakeThenSignalContext context = {posix::TestSemaphore(0), |
| PTHREAD_MUTEX_INITIALIZER, |
| PTHREAD_COND_INITIALIZER}; |
| // Start the thread. |
| SbThread thread = |
| SbThreadCreate(0, kSbThreadNoPriority, kSbThreadNoAffinity, true, NULL, |
| posix::TakeThenSignalEntryPoint, &context); |
| |
| EXPECT_EQ(pthread_mutex_lock(&context.mutex), 0); |
| |
| // Tell the thread to signal the condvar, which will cause it to attempt to |
| // acquire the mutex we are holding. |
| context.do_signal.Put(); |
| |
| // We release the mutex when we wait, allowing the thread to actually do the |
| // signaling, and ensuring we are waiting before it signals. |
| |
| EXPECT_EQ(pthread_cond_wait(&context.condition, &context.mutex), 0); |
| |
| EXPECT_EQ(pthread_mutex_unlock(&context.mutex), 0); |
| |
| // Now we wait for the thread to exit. |
| EXPECT_TRUE(SbThreadJoin(thread, NULL)); |
| EXPECT_EQ(pthread_cond_destroy(&context.condition), 0); |
| EXPECT_EQ(pthread_mutex_destroy(&context.mutex), 0); |
| } |
| |
| TEST(PosixConditionVariableWaitTest, SunnyDay) { |
| const int kMany = kSbMaxThreads > 64 ? 64 : kSbMaxThreads; |
| posix::WaiterContext context; |
| |
| std::vector<SbThread> threads(kMany); |
| for (int i = 0; i < kMany; ++i) { |
| threads[i] = SbThreadCreate(0, kSbThreadNoPriority, kSbThreadNoAffinity, |
| true, NULL, posix::WaiterEntryPoint, &context); |
| } |
| |
| for (int i = 0; i < kMany; ++i) { |
| context.WaitForReturnSignal(); |
| } |
| |
| // Signal the conditions to make the thread wake up and exit. |
| EXPECT_EQ(pthread_cond_broadcast(&context.condition), 0); |
| |
| // Now we wait for the threads to exit. |
| for (int i = 0; i < kMany; ++i) { |
| EXPECT_TRUE(SbThreadJoin(threads[i], NULL)) << "thread = " << threads[i]; |
| } |
| } |
| |
| } // namespace |
| } // namespace nplb |
| } // namespace starboard |