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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "config.h"
#include <wtf/Lock.h>
#include <wtf/Threading.h>
#include <wtf/ThreadingPrimitives.h>
#include <wtf/UniqueArray.h>
#include <wtf/WordLock.h>
namespace TestWebKitAPI {
struct LockInspector {
template<typename LockType>
static bool isFullyReset(LockType& lock)
{
return lock.isFullyReset();
}
};
template<typename LockType>
void runLockTest(unsigned numThreadGroups, unsigned numThreadsPerGroup, unsigned workPerCriticalSection, unsigned numIterations)
{
std::unique_ptr<LockType[]> locks = makeUniqueWithoutFastMallocCheck<LockType[]>(numThreadGroups);
auto words = makeUniqueArray<double>(numThreadGroups);
std::unique_ptr<RefPtr<Thread>[]> threads = makeUniqueWithoutFastMallocCheck<RefPtr<Thread>[]>(numThreadGroups * numThreadsPerGroup);
for (unsigned threadGroupIndex = numThreadGroups; threadGroupIndex--;) {
words[threadGroupIndex] = 0;
for (unsigned threadIndex = numThreadsPerGroup; threadIndex--;) {
threads[threadGroupIndex * numThreadsPerGroup + threadIndex] = Thread::create(
"Lock test thread",
[threadGroupIndex, &locks, &words, numIterations, workPerCriticalSection] () {
for (unsigned i = numIterations; i--;) {
locks[threadGroupIndex].lock();
for (unsigned j = workPerCriticalSection; j--;)
words[threadGroupIndex]++;
locks[threadGroupIndex].unlock();
}
});
}
}
for (unsigned threadIndex = numThreadGroups * numThreadsPerGroup; threadIndex--;)
threads[threadIndex]->waitForCompletion();
double expected = 0;
for (uint64_t i = static_cast<uint64_t>(numIterations) * workPerCriticalSection * numThreadsPerGroup; i--;)
expected++;
for (unsigned threadGroupIndex = numThreadGroups; threadGroupIndex--;)
EXPECT_EQ(expected, words[threadGroupIndex]);
// Now test that the locks correctly reset themselves. We expect that if a single thread locks
// each of the locks twice in a row, then the lock should be in a pristine state.
for (unsigned threadGroupIndex = numThreadGroups; threadGroupIndex--;) {
for (unsigned i = 2; i--;) {
locks[threadGroupIndex].lock();
locks[threadGroupIndex].unlock();
}
EXPECT_EQ(true, LockInspector::isFullyReset(locks[threadGroupIndex]));
}
}
bool skipSlow()
{
#if PLATFORM(WIN) && !defined(NDEBUG)
return true;
#else
return false;
#endif
}
TEST(WTF_WordLock, UncontendedShortSection)
{
runLockTest<WordLock>(1, 1, 1, 10000000);
}
TEST(WTF_WordLock, UncontendedLongSection)
{
runLockTest<WordLock>(1, 1, 10000, 1000);
}
TEST(WTF_WordLock, ContendedShortSection)
{
if (skipSlow())
return;
runLockTest<WordLock>(1, 10, 1, 5000000);
}
TEST(WTF_WordLock, ContendedLongSection)
{
if (skipSlow())
return;
runLockTest<WordLock>(1, 10, 10000, 10000);
}
TEST(WTF_WordLock, ManyContendedShortSections)
{
if (skipSlow())
return;
runLockTest<WordLock>(10, 10, 1, 500000);
}
TEST(WTF_WordLock, ManyContendedLongSections)
{
if (skipSlow())
return;
runLockTest<WordLock>(10, 10, 10000, 500);
}
TEST(WTF_Lock, UncontendedShortSection)
{
runLockTest<Lock>(1, 1, 1, 10000000);
}
TEST(WTF_Lock, UncontendedLongSection)
{
runLockTest<Lock>(1, 1, 10000, 1000);
}
#if !PLATFORM(IOS_SIMULATOR) || defined(NDEBUG)
TEST(WTF_Lock, ContendedShortSection)
{
if (skipSlow())
return;
runLockTest<Lock>(1, 10, 1, 10000000);
}
#endif
TEST(WTF_Lock, ContendedLongSection)
{
if (skipSlow())
return;
runLockTest<Lock>(1, 10, 10000, 10000);
}
TEST(WTF_Lock, ManyContendedShortSections)
{
if (skipSlow())
return;
runLockTest<Lock>(10, 10, 1, 500000);
}
TEST(WTF_Lock, ManyContendedLongSections)
{
if (skipSlow())
return;
runLockTest<Lock>(10, 10, 10000, 1000);
}
TEST(WTF_Lock, ManyContendedLongerSections)
{
if (skipSlow())
return;
runLockTest<Lock>(10, 10, 100000, 1);
}
TEST(WTF_Lock, SectionAddressCollision)
{
if (skipSlow())
return;
runLockTest<Lock>(4, 2, 10000, 2000);
}
namespace {
class MyValue {
public:
void setValue(int value)
{
Locker holdLock { m_lock };
m_value = value;
}
void maybeSetOtherValue(int value)
{
if (!m_otherLock.tryLock())
return;
Locker holdLock { AdoptLock, m_otherLock };
m_otherValue = value;
}
// This function can be used to manually check that compile fails.
template<typename T> void shouldFailCompile(T t)
{
m_value = t;
}
private:
Lock m_lock;
int m_value WTF_GUARDED_BY_LOCK(m_lock) { 77 };
Lock m_otherLock;
int m_otherValue WTF_GUARDED_BY_LOCK(m_otherLock) { 88 };
};
}
TEST(WTF_Lock, Basic)
{
MyValue v;
v.setValue(7);
v.maybeSetOtherValue(34);
}
} // namespace TestWebKitAPI
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