CBaseFilter::m_pLock
| Microsoft DirectShow 9.0 |
CBaseFilter::m_pLock
Pointer to a critical section that is used to serialize state changes.
Syntax
CCritSec *m_pLock;
Remarks
This variable is initialized in the class constructor; see CBaseFilter::CBaseFilter.
Hold this critical section during state transitions, or when a method accesses the state over several operations. The base class holds the critical section in the following methods:
- CBaseFilter::FindPin
- CBaseFilter::GetSyncSource
- CBaseFilter::JoinFilterGraph
- CBaseFilter::IsActive
- CBaseFilter::SetSyncSource
- CBaseFilter::Pause
- CBaseFilter::Run
- CBaseFilter::Stop
Do not hold this critical section during streaming operations (that is, when delivering samples to a downstream filter). Serialize streaming operations using a different critical section. Otherwise, it can cause deadlock.
Requirements
** Header:** Declared in Amfilter.h; include Streams.h.
** Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).
See Also