public void Calling_ReleaseReadLock_should_release_lock()
{
using var readWriteLock = new TinyReadWriteLock(Guid.NewGuid().ToString(), 1);
readWriteLock.AcquireReadLock();
Assert.True(readWriteLock.IsReaderLockHeld);
readWriteLock.ReleaseReadLock();
Assert.False(readWriteLock.IsReaderLockHeld);
}
public void Calling_AcquireWriteLock_then_AquireReadLock_should_wait_for_other_lock()
{
var lockId = Guid.NewGuid().ToString();
using (var readWriteLock1 = new TinyReadWriteLock(lockId, 2))
using (var readWriteLock2 = new TinyReadWriteLock(lockId, 2))
{
readWriteLock1.AcquireWriteLock();
Task.Factory.StartNew(() => readWriteLock2.AcquireReadLock());
Thread.Sleep(50);
Assert.True(readWriteLock1.IsWriterLockHeld);
Assert.False(readWriteLock2.IsReaderLockHeld);
readWriteLock1.ReleaseWriteLock();
Thread.Sleep(50);
Assert.False(readWriteLock1.IsWriterLockHeld);
Assert.True(readWriteLock2.IsReaderLockHeld);
}
}
public void Calling_AcquireWriteLock_then_AquireReadLock_should_wait_for_other_lock()
{
var lockId = Guid.NewGuid().ToString();
using var readWriteLock1 = new TinyReadWriteLock(lockId, 2);
using var readWriteLock2 = new TinyReadWriteLock(lockId, 2);
readWriteLock1.AcquireWriteLock();
var readLockTask = Task.Run(() => readWriteLock2.AcquireReadLock());
WaitForTaskToStart(readLockTask);
Assert.True(readWriteLock1.IsWriterLockHeld);
Assert.False(readWriteLock2.IsReaderLockHeld);
readWriteLock1.ReleaseWriteLock();
readLockTask.Wait();
Assert.False(readWriteLock1.IsWriterLockHeld);
Assert.True(readWriteLock2.IsReaderLockHeld);
}