public LockToken(ILockToken src)
: base(src)
{
this.Value = src.Value;
this.Resource = src.Resource;
this.Timeout = src.Timeout;
}
public IList<IResource> DeleteAll(ILockToken proto)
{
lock (_token)
{
var temp = base.DeleteAll(proto);
foreach (var item in temp)
{
var input = item as ILockToken;
if (input != null)
{
if (!Resources.Contains(input.Resource))
{
Resources.Remove(input.Resource);
}
}
}
return temp;
}
}
/// <summary>
/// Releases the specified token and potentially disposes it if no other thread is waiting on it.
/// </summary>
/// <param name="token">The token to be released.</param>
internal void Release(ILockToken token)
{
LockToken lockToken = (LockToken)token;
this.rw.EnterWriteLock();
if (lockToken.NumWaiting == 0)
{
this.tokens.Remove(lockToken.Id);
lockToken.Sem.Release();
lockToken.Sem.Close();
lockToken.Sem = null;
}
else
{
lockToken.Sem.Release();
}
this.rw.ExitWriteLock();
}
/// <summary>
/// locates or creates a semaphore for the given Id, and tries to acquire it up to the given timeout
/// </summary>
/// <param name="id">The identifier for the semaphore to acquire.</param>
/// <param name="timeoutInMillis">The timeout in milliseconds.</param>
/// <param name="releaseToken">The release token if acquired.</param>
/// <returns><c>true</c> if true acquisition happened, <c>false</c> otherwise.</returns>
internal bool FindAndTryAcquire(Guid id, int timeoutInMillis, out ILockToken releaseToken)
{
this.rw.EnterWriteLock();
LockToken ev;
if (!this.tokens.TryGetValue(id, out ev))
{
ev = new LockToken {
Id = id, Sem = new Semaphore(1, 1), NumWaiting = 0
};
this.tokens[id] = ev;
}
Interlocked.Increment(ref ev.NumWaiting);
this.rw.ExitWriteLock();
bool acq = ev.Sem.WaitOne(timeoutInMillis);
Interlocked.Decrement(ref ev.NumWaiting);
releaseToken = acq ? ev : null;
return(acq);
}
public CollectionLockToken(ILockToken src, CollectionLockTokenDepth depth)
: base(src)
{
this.Depth = depth;
}
public void Save(ILockToken input)
{
lock (_token)
{
base.Save(input);
if (!Resources.Contains(input.Resource))
{
Resources.Add(input.Resource);
}
}
}
