public virtual bool TryAcquireUpgradeableReadLock(TimeSpan timeout, out IUpgradeableReadLockAcquisition upgradeableReadLockAcquisition)
{
if (InternalLock.RecursionPolicy == LockRecursionPolicy.NoRecursion &&
(InternalLock.IsReadLockHeld || InternalLock.IsUpgradeableReadLockHeld || InternalLock.IsWriteLockHeld))
{
upgradeableReadLockAcquisition = null;
return false;
}
if (InternalLock.RecursionPolicy == LockRecursionPolicy.SupportsRecursion &&
!(InternalLock.IsUpgradeableReadLockHeld || InternalLock.IsWriteLockHeld))
{
upgradeableReadLockAcquisition = null;
return false;
}
IDisposable disposables = (IDisposable)null;
var ok = TryLockChildren(LockTypes.UpgradeableRead, timeout, out disposables);
if (ok)
{
ok = InternalLock.TryEnterUpgradeableReadLock(timeout);
if (ok)
{
upgradeableReadLockAcquisition = new UpgradeableReadLockAcquisition(owner: this, disposeWhenDone: disposables);
return true;
}
else
{
disposables?.Dispose();
}
}
upgradeableReadLockAcquisition = null;
return false;
}
public bool TryAcquireUpgradeableReadLock(TimeSpan timeout, out IUpgradeableReadLockAcquisition upgradeableReadLockAcquisition)
{
if (InternalLock.RecursionPolicy == LockRecursionPolicy.NoRecursion &&
(InternalLock.IsReadLockHeld || InternalLock.IsUpgradeableReadLockHeld || InternalLock.IsWriteLockHeld))
{
upgradeableReadLockAcquisition = null;
return false;
}
if (InternalLock.RecursionPolicy == LockRecursionPolicy.SupportsRecursion &&
!(InternalLock.IsUpgradeableReadLockHeld || InternalLock.IsWriteLockHeld))
{
upgradeableReadLockAcquisition = null;
return false;
}
if(InternalLock.TryEnterUpgradeableReadLock(timeout))
{
upgradeableReadLockAcquisition = new UpgradeableReadLockAcquisition(owner: this);
return true;
}
else
{
upgradeableReadLockAcquisition = null;
return false;
}
}
