// Copyright 2013 the V8 project authors. All rights reserved.
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// 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
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#include "src/v8.h"
#include "src/platform/condition-variable.h"
#include "src/platform/time.h"
#include "test/cctest/cctest.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);
}
}