private ThreadLockState GetGlobalThreadState()
{
if (_currentThreadState == null)
{
Interlocked.CompareExchange(ref _currentThreadState, new Dictionary <int, ThreadLockState>(), null);
}
ThreadLockState state;
if (!_currentThreadState.TryGetValue(_id, out state))
{
_currentThreadState[_id] = state = new ThreadLockState();
}
return(state);
}
private bool CheckState(ThreadLockState state, int millisecondsTimeout, LockState validState)
{
if (_disposed)
{
throw new ObjectDisposedException("ReaderWriterLockSlim");
}
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("millisecondsTimeout");
}
// Detect and prevent recursion
var ctstate = state.LockState;
if (ctstate != LockState.None && _noRecursion && (!ctstate.Has(LockState.Upgradable) || validState == LockState.Upgradable))
{
throw new LockRecursionException("The current thread has already a lock and recursion isn't supported");
}
if (_noRecursion)
{
return(false);
}
// If we already had right lock state, just return
if (ctstate.Has(validState))
{
return(true);
}
// In read mode you can just enter Read recursively
if (ctstate == LockState.Read)
{
throw new LockRecursionException();
}
return(false);
}