[PATCH v4 02/15] Add support for an owned buffer

[Tom Rini]

On Sat, Sep 25, 2021 at 07:03:07AM -0600, Simon Glass wrote:

> When passing a data buffer back from a function, it is not always clear
> who owns the buffer, i.e. who is responsible for freeing the memory used.
> An example of this is where multiple files are decompressed from the
> firmware image, using a temporary buffer for reading (since the
> compressed data has to live somewhere) and producing a temporary or
> permanent buffer with the resuilts.
> 
> Where the firmware image can be memory-mapped, as on x86, the compressed
> data does not need to be buffered, but the complexity of having a buffer
> which is either allocated or not, makes the code hard to understand.
> 
> Introduce a new 'abuf' which supports simple buffer operations:
> 
> - encapsulating a buffer and its size
> - either allocated with malloc() or not
> - able to be reliably freed if necessary
> - able to be converted to an allocated buffer if needed
> 
> This simple API makes it easier to deal with allocated and memory-mapped
> buffers.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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