protected virtual IDisposable LockChildren(LockTypes lockType)
{
var result = new CompositeDisposable();
lock (ChildLocksSync)
{
foreach (var child in ChildLocks)
{
if (lockType == LockTypes.Read)
{
result.AddIfNotNull(child.AcquireReadLockIfNotHeld());
}
else if (lockType == LockTypes.UpgradeableRead)
{
result.AddIfNotNull(child.AcquireUpgradeableReadLock());
}
else if (lockType == LockTypes.Write)
{
result.AddIfNotNull(child.AcquireWriteLockIfNotHeld());
}
else
{
throw new NotSupportedException(lockType.ToString());
}
}
}
return result;
}
public virtual bool TryLockChildren(LockTypes lockType, TimeSpan timeout, out IDisposable childDisposables)
{
var all_child_disposables = new CompositeDisposable();
childDisposables = all_child_disposables;
bool all_good = true;
foreach(var child in ChildLocks)
{
if (!all_good)
break;
if (lockType == LockTypes.Read)
{
var acqusition = (IReadLockAcquisition)null;
if (child.TryAcquireReadLock(timeout, out acqusition))
{
all_child_disposables.AddIfNotNull(acqusition);
}
else
{
all_good = false;
}
}
else if (lockType == LockTypes.UpgradeableRead)
{
var acqusition = (IUpgradeableReadLockAcquisition)null;
if (child.TryAcquireUpgradeableReadLock(timeout, out acqusition))
{
all_child_disposables.AddIfNotNull(acqusition);
}
else
{
all_good = false;
}
}
else if (lockType == LockTypes.Write)
{
var acqusition = (IWriteLockAcquisition)null;
if (child.TryAcquireWriteLock(timeout, out acqusition))
{
all_child_disposables.AddIfNotNull(acqusition);
}
else
{
all_good = false;
}
}
else
{
throw new NotSupportedException(lockType.ToString());
}
}
if(all_good)
{
return true;
}
else
{
all_child_disposables.Clear();
return false;
}
}