LockIt Internal Class (Compact 2013)

  • 项目

3/26/2014

This internal helper class handles locking and unlocking.

Syntax

LockIt(
  _DERIVED_* p
);

Parameters

  • p
    Pointer to the derived object.

Return Values

None.

Remarks

The constructor method locks the object, and the destructor method unlocks the object. To lock the object from inside your derived class, declare a local variable of type LockIt, as shown in the following example.

{
    LockIt lck(static_cast<_DERIVED_ *>(this)); // Locks the object.
} // lck goes out of scope, object is unlocked.

The methods in IMediaObjectImpl handle locking, so in most cases the derived class does not need to lock the object.

Requirements

Header

dmoimpl.h

See Also

Reference

IMediaObjectImpl Class Template
DirectX Media Objects Reference
DMO Base Class Reference