CPullPin::DecideAllocator

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Windows Embedded CE 6.0 R3

4/8/2010

Negotiates an allocator to use with the asynchronous reader.

Syntax

virtual HRESULT DecideAllocator(
  ImemAllocator* pAlloc,
  ALLOCATOR_PROPERTIES* pProps 
);

Parameters

• pAlloc
  Allocator to propose as the preferred allocator (optional). Pass NULL if you are not proposing an allocator.

• pProps
  Size, count, and alignment of the allocator (optional). Pass zero if not requesting the allocator properties.

Return Value

Returns S_OK if successful, VFW_E_BADALIGN if eProps contains an invalid alignment property, E_OUTOFMEMORY if there is not enough memory available to create an allocator, and E_NOINTERFACE if the created IMemAllocator interface is invalid.

Remarks

This member function calls the IAsyncReader::RequestAllocator method to negotiate an allocator.

Requirements