public void AcquireGlobalLock()
{
lock (_sync_mutex)
{
//wait untill global lock is released.
if (_globalLockingContext != null && _globalLockingContext.IsCurrentContext)
{
_globalLockingContext.IncrementRefCount();
return;
}
while (_globalLock || _waiting4globalLock)
{
Monitor.Wait(_sync_mutex);
}
if (_lockTable.Count == 0)
{
//global lock is acquired.
_globalLock = true;
}
else
{
_waiting4globalLock = true;
_globalLockInfo = new LockInfo();
}
}
if (_globalLockInfo != null && !_globalLock)
{
_globalLockInfo.AddWaitingThread();
}
_globalLockingContext = new LockingContext();
_globalLockingContext.IncrementRefCount();
}
public void AcquireLock(object key)
{
LockInfo info = null;
lock (_sync_mutex)
{
while (_globalLock || _waiting4globalLock)
{
if (_globalLock && _globalLockingContext != null && _globalLockingContext.IsCurrentContext)
{
break;
}
Monitor.Wait(_sync_mutex);
}
if (!_lockTable.Contains(key))
{
_lockTable.Add(key, new LockInfo());
}
else
{
info = _lockTable[key] as LockInfo;
}
}
if (info != null)
{
bool lockAcquired = info.AddWaitingThread();
//retry
if (!lockAcquired)
{
AcquireLock(key);
}
}
}