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#include <library/cpp/testing/gtest/gtest.h>
#include <library/cpp/yt/threading/recursive_spin_lock.h>
#include <library/cpp/yt/threading/event_count.h>
#include <thread>
namespace NYT::NThreading {
namespace {
////////////////////////////////////////////////////////////////////////////////
TEST(TRecursiveSpinLockTest, SingleThread)
{
TRecursiveSpinLock lock;
EXPECT_FALSE(lock.IsLocked());
EXPECT_TRUE(lock.TryAcquire());
EXPECT_TRUE(lock.IsLocked());
EXPECT_TRUE(lock.TryAcquire());
EXPECT_TRUE(lock.IsLocked());
lock.Release();
EXPECT_TRUE(lock.IsLocked());
lock.Release();
EXPECT_FALSE(lock.IsLocked());
EXPECT_TRUE(lock.TryAcquire());
EXPECT_TRUE(lock.IsLocked());
lock.Release();
lock.Acquire();
lock.Release();
}
TEST(TRecursiveSpinLockTest, TwoThreads)
{
TRecursiveSpinLock lock;
TEvent e1, e2, e3, e4, e5, e6, e7;
std::thread t1([&] {
e1.Wait();
EXPECT_TRUE(lock.IsLocked());
EXPECT_FALSE(lock.IsLockedByCurrentThread());
EXPECT_FALSE(lock.TryAcquire());
e2.NotifyOne();
e3.Wait();
EXPECT_TRUE(lock.IsLocked());
EXPECT_FALSE(lock.IsLockedByCurrentThread());
EXPECT_FALSE(lock.TryAcquire());
e4.NotifyOne();
e5.Wait();
EXPECT_FALSE(lock.IsLocked());
EXPECT_FALSE(lock.IsLockedByCurrentThread());
EXPECT_TRUE(lock.TryAcquire());
e6.NotifyOne();
e7.Wait();
lock.Release();
});
std::thread t2([&] {
EXPECT_FALSE(lock.IsLocked());
EXPECT_TRUE(lock.TryAcquire());
EXPECT_TRUE(lock.IsLockedByCurrentThread());
e1.NotifyOne();
e2.Wait();
EXPECT_TRUE(lock.TryAcquire());
EXPECT_TRUE(lock.IsLockedByCurrentThread());
e3.NotifyOne();
e4.Wait();
lock.Release();
lock.Release();
EXPECT_FALSE(lock.IsLocked());
e5.NotifyOne();
e6.Wait();
EXPECT_TRUE(lock.IsLocked());
EXPECT_FALSE(lock.IsLockedByCurrentThread());
e7.NotifyOne();
lock.Acquire();
lock.Acquire();
lock.Release();
lock.Release();
});
t1.join();
t2.join();
}
////////////////////////////////////////////////////////////////////////////////
} // namespace
} // namespace NYT::NThreading
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