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// Copyright (c) 2012 The Chromium 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 "rlz/lib/recursive_lock.h"
#include <stdlib.h>
#include "base/compiler_specific.h"
#include "base/threading/platform_thread.h"
#include "base/time.h"
#include "testing/gtest/include/gtest/gtest.h"
using base::kNullThreadHandle;
using base::PlatformThread;
using base::PlatformThreadHandle;
using base::TimeDelta;
namespace rlz_lib {
// Basic test to make sure that Acquire()/Release() don't crash.
class BasicLockTestThread : public PlatformThread::Delegate {
public:
BasicLockTestThread(RecursiveLock* lock) : lock_(lock), acquired_(0) {}
virtual void ThreadMain() OVERRIDE {
for (int i = 0; i < 10; i++) {
lock_->Acquire();
acquired_++;
lock_->Release();
}
for (int i = 0; i < 10; i++) {
lock_->Acquire();
acquired_++;
PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 20));
lock_->Release();
}
}
int acquired() const { return acquired_; }
private:
RecursiveLock* lock_;
int acquired_;
DISALLOW_COPY_AND_ASSIGN(BasicLockTestThread);
};
TEST(RecursiveLockTest, Basic) {
RecursiveLock lock;
BasicLockTestThread thread(&lock);
PlatformThreadHandle handle = kNullThreadHandle;
ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
int acquired = 0;
for (int i = 0; i < 5; i++) {
lock.Acquire();
acquired++;
lock.Release();
}
for (int i = 0; i < 10; i++) {
lock.Acquire();
acquired++;
PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 20));
lock.Release();
}
for (int i = 0; i < 5; i++) {
lock.Acquire();
acquired++;
PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 20));
lock.Release();
}
PlatformThread::Join(handle);
EXPECT_EQ(acquired, 20);
EXPECT_EQ(thread.acquired(), 20);
}
// Tests that locks are actually exclusive.
class MutexLockTestThread : public PlatformThread::Delegate {
public:
MutexLockTestThread(RecursiveLock* lock, int* value)
: lock_(lock),
value_(value) {
}
// Static helper which can also be called from the main thread.
static void DoStuff(RecursiveLock* lock, int* value) {
for (int i = 0; i < 40; i++) {
lock->Acquire();
int v = *value;
PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 10));
*value = v + 1;
lock->Release();
}
}
virtual void ThreadMain() OVERRIDE {
DoStuff(lock_, value_);
}
private:
RecursiveLock* lock_;
int* value_;
DISALLOW_COPY_AND_ASSIGN(MutexLockTestThread);
};
TEST(RecursiveLockTest, MutexTwoThreads) {
RecursiveLock lock;
int value = 0;
MutexLockTestThread thread(&lock, &value);
PlatformThreadHandle handle = kNullThreadHandle;
ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
MutexLockTestThread::DoStuff(&lock, &value);
PlatformThread::Join(handle);
EXPECT_EQ(2 * 40, value);
}
TEST(RecursiveLockTest, MutexFourThreads) {
RecursiveLock lock;
int value = 0;
MutexLockTestThread thread1(&lock, &value);
MutexLockTestThread thread2(&lock, &value);
MutexLockTestThread thread3(&lock, &value);
PlatformThreadHandle handle1 = kNullThreadHandle;
PlatformThreadHandle handle2 = kNullThreadHandle;
PlatformThreadHandle handle3 = kNullThreadHandle;
ASSERT_TRUE(PlatformThread::Create(0, &thread1, &handle1));
ASSERT_TRUE(PlatformThread::Create(0, &thread2, &handle2));
ASSERT_TRUE(PlatformThread::Create(0, &thread3, &handle3));
MutexLockTestThread::DoStuff(&lock, &value);
PlatformThread::Join(handle1);
PlatformThread::Join(handle2);
PlatformThread::Join(handle3);
EXPECT_EQ(4 * 40, value);
}
// Tests that locks are recursive.
class MutexRecursiveLockTestThread : public PlatformThread::Delegate {
public:
MutexRecursiveLockTestThread(RecursiveLock* lock, int* value)
: lock_(lock),
value_(value) {
}
// Static helper which can also be called from the main thread.
static void DoStuff(RecursiveLock* lock, int* value) {
for (int i = 0; i < 20; i++) {
// First lock.
lock->Acquire();
int v = *value;
PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 10));
*value = v + 1;
{
// Recursive lock.
lock->Acquire();
int v = *value;
PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 10));
*value = v + 1;
lock->Release();
}
v = *value;
PlatformThread::Sleep(TimeDelta::FromMilliseconds(rand() % 10));
*value = v + 1;
lock->Release();
}
}
virtual void ThreadMain() OVERRIDE {
DoStuff(lock_, value_);
}
private:
RecursiveLock* lock_;
int* value_;
DISALLOW_COPY_AND_ASSIGN(MutexRecursiveLockTestThread);
};
TEST(RecursiveLockTest, MutexTwoThreadsRecursive) {
RecursiveLock lock;
int value = 0;
MutexRecursiveLockTestThread thread(&lock, &value);
PlatformThreadHandle handle = kNullThreadHandle;
ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
MutexRecursiveLockTestThread::DoStuff(&lock, &value);
PlatformThread::Join(handle);
EXPECT_EQ(2 * 60, value);
}
TEST(RecursiveLockTest, MutexFourThreadsRecursive) {
RecursiveLock lock;
int value = 0;
MutexRecursiveLockTestThread thread1(&lock, &value);
MutexRecursiveLockTestThread thread2(&lock, &value);
MutexRecursiveLockTestThread thread3(&lock, &value);
PlatformThreadHandle handle1 = kNullThreadHandle;
PlatformThreadHandle handle2 = kNullThreadHandle;
PlatformThreadHandle handle3 = kNullThreadHandle;
ASSERT_TRUE(PlatformThread::Create(0, &thread1, &handle1));
ASSERT_TRUE(PlatformThread::Create(0, &thread2, &handle2));
ASSERT_TRUE(PlatformThread::Create(0, &thread3, &handle3));
MutexRecursiveLockTestThread::DoStuff(&lock, &value);
PlatformThread::Join(handle1);
PlatformThread::Join(handle2);
PlatformThread::Join(handle3);
EXPECT_EQ(4 * 60, value);
}
} // namespace rlz_lib
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