RMBufAllocator Class Reference
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class RMBufAllocator : public TCommsBufAllocator
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RMBufAllocator
provides a handle that can be used to speed
RMBufChain
allocation. Without this handle every allocation internally accesses thread local storage. Creation of the
RMBufAllocator
handle uses thread local storage but subsequent
RMBufChain
allocations using this handle don't.
RMBufAllocator
also provides information about the state of the
RMBuf
free pools, each size of
RMBuf
has a different free pool.
Constructor & Destructor Documentation
RMBufAllocator()
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IMPORT_C
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RMBufAllocator
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(
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)
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Member Functions Documentation
BytesAvailable()
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IMPORT_C
TInt
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BytesAvailable
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(
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)
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const
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Obtains the total available bytes available in the mbuf system in it's entirety.
BytesAvailable(TInt)
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IMPORT_C
TInt
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BytesAvailable
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(
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TInt
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aSize
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)
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const
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Obtains the total bytes available in the pool of the given sized MBuf.
Parameters
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TInt
aSize
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one of the sizes returned by RMBufAllocator::NextMBufSize().
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LargestMBufSize()
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IMPORT_C
TInt
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LargestMBufSize
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(
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)
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const
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NextMBufSize(TInt)
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IMPORT_C
TInt
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NextMBufSize
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(
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TInt
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aSize
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)
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const
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Returns the first MBuf size that is greater than aSize, returns KErrNotFound if there isn't an MBuf whose size is larger than aSize. Can be used to find the size of each of the MBuf pools by starting at 0 and repeatedly passing in the result of the previous call until KErrNotFound occurs.
Parameters
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TInt
aSize
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a starting size to search upwards from.
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Copyright ©2010 Nokia Corporation and/or its subsidiary(-ies).
All rights
reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License
v1.0.