v8/test/unittests/base/platform/semaphore-unittest.cc
bmeurer@chromium.org bfd37ab267 Move unit tests to test/unittests.
As per discussion on the V8 team, this is the place we want them to live,
not following the Chrome Style Guide for this.

BUG=v8:3489
LOG=y
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/615393002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24350 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-10-01 08:34:25 +00:00

146 lines
3.7 KiB
C++

// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <cstring>
#include "src/base/platform/platform.h"
#include "src/base/platform/semaphore.h"
#include "src/base/platform/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace v8 {
namespace base {
namespace {
static const char kAlphabet[] = "XKOAD";
static const size_t kAlphabetSize = sizeof(kAlphabet) - 1;
static const size_t kBufferSize = 987; // GCD(buffer size, alphabet size) = 1
static const size_t kDataSize = kBufferSize * kAlphabetSize * 10;
class ProducerThread FINAL : public Thread {
public:
ProducerThread(char* buffer, Semaphore* free_space, Semaphore* used_space)
: Thread(Options("ProducerThread")),
buffer_(buffer),
free_space_(free_space),
used_space_(used_space) {}
virtual ~ProducerThread() {}
virtual void Run() OVERRIDE {
for (size_t n = 0; n < kDataSize; ++n) {
free_space_->Wait();
buffer_[n % kBufferSize] = kAlphabet[n % kAlphabetSize];
used_space_->Signal();
}
}
private:
char* buffer_;
Semaphore* const free_space_;
Semaphore* const used_space_;
};
class ConsumerThread FINAL : public Thread {
public:
ConsumerThread(const char* buffer, Semaphore* free_space,
Semaphore* used_space)
: Thread(Options("ConsumerThread")),
buffer_(buffer),
free_space_(free_space),
used_space_(used_space) {}
virtual ~ConsumerThread() {}
virtual void Run() OVERRIDE {
for (size_t n = 0; n < kDataSize; ++n) {
used_space_->Wait();
EXPECT_EQ(kAlphabet[n % kAlphabetSize], buffer_[n % kBufferSize]);
free_space_->Signal();
}
}
private:
const char* buffer_;
Semaphore* const free_space_;
Semaphore* const used_space_;
};
class WaitAndSignalThread FINAL : public Thread {
public:
explicit WaitAndSignalThread(Semaphore* semaphore)
: Thread(Options("WaitAndSignalThread")), semaphore_(semaphore) {}
virtual ~WaitAndSignalThread() {}
virtual void Run() OVERRIDE {
for (int n = 0; n < 100; ++n) {
semaphore_->Wait();
ASSERT_FALSE(semaphore_->WaitFor(TimeDelta::FromMicroseconds(1)));
semaphore_->Signal();
}
}
private:
Semaphore* const semaphore_;
};
} // namespace
TEST(Semaphore, ProducerConsumer) {
char buffer[kBufferSize];
std::memset(buffer, 0, sizeof(buffer));
Semaphore free_space(kBufferSize);
Semaphore used_space(0);
ProducerThread producer_thread(buffer, &free_space, &used_space);
ConsumerThread consumer_thread(buffer, &free_space, &used_space);
producer_thread.Start();
consumer_thread.Start();
producer_thread.Join();
consumer_thread.Join();
}
TEST(Semaphore, WaitAndSignal) {
Semaphore semaphore(0);
WaitAndSignalThread t1(&semaphore);
WaitAndSignalThread t2(&semaphore);
t1.Start();
t2.Start();
// Make something available.
semaphore.Signal();
t1.Join();
t2.Join();
semaphore.Wait();
EXPECT_FALSE(semaphore.WaitFor(TimeDelta::FromMicroseconds(1)));
}
TEST(Semaphore, WaitFor) {
Semaphore semaphore(0);
// Semaphore not signalled - timeout.
ASSERT_FALSE(semaphore.WaitFor(TimeDelta::FromMicroseconds(0)));
ASSERT_FALSE(semaphore.WaitFor(TimeDelta::FromMicroseconds(100)));
ASSERT_FALSE(semaphore.WaitFor(TimeDelta::FromMicroseconds(1000)));
// Semaphore signalled - no timeout.
semaphore.Signal();
ASSERT_TRUE(semaphore.WaitFor(TimeDelta::FromMicroseconds(0)));
semaphore.Signal();
ASSERT_TRUE(semaphore.WaitFor(TimeDelta::FromMicroseconds(100)));
semaphore.Signal();
ASSERT_TRUE(semaphore.WaitFor(TimeDelta::FromMicroseconds(1000)));
}
} // namespace base
} // namespace v8