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Supportanfrage

We would like to know more information on function adtf::streaming:ant::ISample::WriteLock

Is there memcpy/memset involved internally?

Lösung

It depends on the current state of the buffer:

• Sample has no buffer yet (i.e. first call to WriteLock()): If you specify a size via the szPreAllocateSize parameter the buffer will be allocated, but left untouched otherwise.
• Sample already has a buffer: If you specify a size via the szPreAllocateSize the buffer will be resized to this value. If szPreAllocateSize is bigger than the current size, a new buffer will allocated and the "old" data will be copied to the new enlarged buffer.

Basically it behaves exactly like std::vector without the memset in the constructor with the size parameter.