// Copyright 2013 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include "v8.h" #include "cctest.h" #include "platform/condition-variable.h" #include "platform/time.h" using namespace ::v8::internal; TEST(WaitForAfterNofityOnSameThread) { for (int n = 0; n < 10; ++n) { Mutex mutex; ConditionVariable cv; LockGuard<Mutex> lock_guard(&mutex); cv.NotifyOne(); CHECK_EQ(false, cv.WaitFor(&mutex, TimeDelta::FromMicroseconds(n))); cv.NotifyAll(); CHECK_EQ(false, cv.WaitFor(&mutex, TimeDelta::FromMicroseconds(n))); } } class ThreadWithMutexAndConditionVariable V8_FINAL : public Thread { public: ThreadWithMutexAndConditionVariable() : Thread("ThreadWithMutexAndConditionVariable"), running_(false), finished_(false) {} virtual ~ThreadWithMutexAndConditionVariable() {} virtual void Run() V8_OVERRIDE { LockGuard<Mutex> lock_guard(&mutex_); running_ = true; cv_.NotifyOne(); while (running_) { cv_.Wait(&mutex_); } finished_ = true; cv_.NotifyAll(); } bool running_; bool finished_; ConditionVariable cv_; Mutex mutex_; }; TEST(MultipleThreadsWithSeparateConditionVariables) { static const int kThreadCount = 128; ThreadWithMutexAndConditionVariable threads[kThreadCount]; for (int n = 0; n < kThreadCount; ++n) { LockGuard<Mutex> lock_guard(&threads[n].mutex_); CHECK(!threads[n].running_); CHECK(!threads[n].finished_); threads[n].Start(); // Wait for nth thread to start. while (!threads[n].running_) { threads[n].cv_.Wait(&threads[n].mutex_); } } for (int n = kThreadCount - 1; n >= 0; --n) { LockGuard<Mutex> lock_guard(&threads[n].mutex_); CHECK(threads[n].running_); CHECK(!threads[n].finished_); } for (int n = 0; n < kThreadCount; ++n) { LockGuard<Mutex> lock_guard(&threads[n].mutex_); CHECK(threads[n].running_); CHECK(!threads[n].finished_); // Tell the nth thread to quit. threads[n].running_ = false; threads[n].cv_.NotifyOne(); } for (int n = kThreadCount - 1; n >= 0; --n) { // Wait for nth thread to quit. LockGuard<Mutex> lock_guard(&threads[n].mutex_); while (!threads[n].finished_) { threads[n].cv_.Wait(&threads[n].mutex_); } CHECK(!threads[n].running_); CHECK(threads[n].finished_); } for (int n = 0; n < kThreadCount; ++n) { threads[n].Join(); LockGuard<Mutex> lock_guard(&threads[n].mutex_); CHECK(!threads[n].running_); CHECK(threads[n].finished_); } } class ThreadWithSharedMutexAndConditionVariable V8_FINAL : public Thread { public: ThreadWithSharedMutexAndConditionVariable() : Thread("ThreadWithSharedMutexAndConditionVariable"), running_(false), finished_(false), cv_(NULL), mutex_(NULL) {} virtual ~ThreadWithSharedMutexAndConditionVariable() {} virtual void Run() V8_OVERRIDE { LockGuard<Mutex> lock_guard(mutex_); running_ = true; cv_->NotifyAll(); while (running_) { cv_->Wait(mutex_); } finished_ = true; cv_->NotifyAll(); } bool running_; bool finished_; ConditionVariable* cv_; Mutex* mutex_; }; TEST(MultipleThreadsWithSharedSeparateConditionVariables) { static const int kThreadCount = 128; ThreadWithSharedMutexAndConditionVariable threads[kThreadCount]; ConditionVariable cv; Mutex mutex; for (int n = 0; n < kThreadCount; ++n) { threads[n].mutex_ = &mutex; threads[n].cv_ = &cv; } // Start all threads. { LockGuard<Mutex> lock_guard(&mutex); for (int n = 0; n < kThreadCount; ++n) { CHECK(!threads[n].running_); CHECK(!threads[n].finished_); threads[n].Start(); } } // Wait for all threads to start. { LockGuard<Mutex> lock_guard(&mutex); for (int n = kThreadCount - 1; n >= 0; --n) { while (!threads[n].running_) { cv.Wait(&mutex); } } } // Make sure that all threads are running. { LockGuard<Mutex> lock_guard(&mutex); for (int n = 0; n < kThreadCount; ++n) { CHECK(threads[n].running_); CHECK(!threads[n].finished_); } } // Tell all threads to quit. { LockGuard<Mutex> lock_guard(&mutex); for (int n = kThreadCount - 1; n >= 0; --n) { CHECK(threads[n].running_); CHECK(!threads[n].finished_); // Tell the nth thread to quit. threads[n].running_ = false; } cv.NotifyAll(); } // Wait for all threads to quit. { LockGuard<Mutex> lock_guard(&mutex); for (int n = 0; n < kThreadCount; ++n) { while (!threads[n].finished_) { cv.Wait(&mutex); } } } // Make sure all threads are finished. { LockGuard<Mutex> lock_guard(&mutex); for (int n = kThreadCount - 1; n >= 0; --n) { CHECK(!threads[n].running_); CHECK(threads[n].finished_); } } // Join all threads. for (int n = 0; n < kThreadCount; ++n) { threads[n].Join(); } } class LoopIncrementThread V8_FINAL : public Thread { public: LoopIncrementThread(int rem, int* counter, int limit, int thread_count, ConditionVariable* cv, Mutex* mutex) : Thread("LoopIncrementThread"), rem_(rem), counter_(counter), limit_(limit), thread_count_(thread_count), cv_(cv), mutex_(mutex) { CHECK_LT(rem, thread_count); CHECK_EQ(0, limit % thread_count); } virtual void Run() V8_OVERRIDE { int last_count = -1; while (true) { LockGuard<Mutex> lock_guard(mutex_); int count = *counter_; while (count % thread_count_ != rem_ && count < limit_) { cv_->Wait(mutex_); count = *counter_; } if (count >= limit_) break; CHECK_EQ(*counter_, count); if (last_count != -1) { CHECK_EQ(last_count + (thread_count_ - 1), count); } count++; *counter_ = count; last_count = count; cv_->NotifyAll(); } } private: const int rem_; int* counter_; const int limit_; const int thread_count_; ConditionVariable* cv_; Mutex* mutex_; }; TEST(LoopIncrement) { static const int kMaxThreadCount = 16; Mutex mutex; ConditionVariable cv; for (int thread_count = 1; thread_count < kMaxThreadCount; ++thread_count) { int limit = thread_count * 100; int counter = 0; // Setup the threads. Thread** threads = new Thread*[thread_count]; for (int n = 0; n < thread_count; ++n) { threads[n] = new LoopIncrementThread( n, &counter, limit, thread_count, &cv, &mutex); } // Start all threads. for (int n = thread_count - 1; n >= 0; --n) { threads[n]->Start(); } // Join and cleanup all threads. for (int n = 0; n < thread_count; ++n) { threads[n]->Join(); delete threads[n]; } delete[] threads; CHECK_EQ(limit, counter); } }