private void DoUnlock(long targetLockBit)
{
long currentState;
long newState;
do
{
currentState = _state;
if (!CanUnlock(currentState, targetLockBit))
{
throw new System.InvalidOperationException("Can not unlock lock that is already locked");
}
newState = currentState & ~targetLockBit;
} while (!UnsafeUtil.compareAndSwapLong(this, _stateOffset, currentState, newState));
}
private void DoLock(long targetLockBit)
{
long currentState;
long newState;
do
{
currentState = _state;
while (!CanLock(currentState, targetLockBit))
{
// sleep
Sleep();
currentState = _state;
}
newState = currentState | targetLockBit;
} while (!UnsafeUtil.compareAndSwapLong(this, _stateOffset, currentState, newState));
}
private static bool CompareAndSetState(long address, long expect, long update)
{
return(UnsafeUtil.compareAndSwapLong(null, address, expect, update));
}