internal int GetMemberCount(IConfigurationSession session, ExDateTime now, int quota)
{
int result = 0;
this.ThrowAnySavedExceptionsFromAsyncThreads();
try
{
if (!this.cachedCountLock.TryEnterReadLock(SystemAddressListMemberCountCacheValue.readerLockTimeout))
{
throw new TransientException(DirectoryStrings.ErrorTimeoutReadingSystemAddressListMemberCount);
}
if (this.systemAddressListExists && this.lastQueriedTime + this.lifetime < now)
{
SystemAddressListMemberCountCacheValue.UpdateInfo updateInfo = new SystemAddressListMemberCountCacheValue.UpdateInfo(session, now, quota);
this.StartAsyncUpdate(updateInfo);
}
result = this.memberCount;
}
finally
{
try
{
this.cachedCountLock.ExitReadLock();
}
catch (SynchronizationLockException)
{
}
}
return(result);
}
internal int InitializeMemberCount(IConfigurationSession session, ExDateTime now, int quota)
{
try
{
if (!this.cachedCountLock.TryEnterReadLock(SystemAddressListMemberCountCacheValue.readerLockTimeout))
{
throw new TransientException(DirectoryStrings.ErrorTimeoutReadingSystemAddressListMemberCount);
}
if (!this.systemAddressListExists)
{
return(0);
}
}
finally
{
try
{
this.cachedCountLock.ExitReadLock();
}
catch (SynchronizationLockException)
{
}
}
SystemAddressListMemberCountCacheValue.UpdateInfo o = new SystemAddressListMemberCountCacheValue.UpdateInfo(session, now, quota);
Interlocked.Increment(ref this.asyncUpdatesInProgress);
this.UpdateMemberCount(o);
this.ThrowAnySavedExceptionsFromAsyncThreads();
return(this.memberCount);
}
private void StartAsyncUpdate(SystemAddressListMemberCountCacheValue.UpdateInfo updateInfo)
{
if (this.asyncUpdatesInProgress == 0)
{
Interlocked.Increment(ref this.asyncUpdatesInProgress);
ThreadPool.QueueUserWorkItem(new WaitCallback(this.UpdateMemberCount), updateInfo);
}
}
private void UpdateMemberCount(object o)
{
try
{
SystemAddressListMemberCountCacheValue.UpdateInfo updateInfo = (SystemAddressListMemberCountCacheValue.UpdateInfo)o;
Exception ex = null;
int num = 0;
try
{
num = AddressBookBase.GetAddressListSize(updateInfo.Session, this.systemAddressListGuid);
}
catch (Exception ex2)
{
ex = ex2;
}
try
{
this.cachedCountLock.EnterWriteLock();
if (ex != null)
{
this.asyncException = ex;
}
else if (num == -1)
{
this.systemAddressListExists = false;
this.memberCount = 0;
this.lastQueriedTime = updateInfo.Now;
this.lifetime = TimeSpan.MaxValue;
}
else
{
this.memberCount = num;
this.lastQueriedTime = updateInfo.Now;
this.lifetime = this.CalculateValidLifetime(updateInfo.Quota);
}
}
finally
{
try
{
this.cachedCountLock.ExitWriteLock();
}
catch (SynchronizationLockException)
{
}
}
}
finally
{
Interlocked.Decrement(ref this.asyncUpdatesInProgress);
}
}