Re: io_read() semantics

[Marcus Brinkmann]

On Tue, Jun 11, 2002 at 03:19:32PM +0200, Ludovic Courtès wrote:
> But diskfs/io-read.c does contain a call to mmap(), so is it just some kind of
> `sanity check'? If MiG allocates a new buffer, how can we deallocated it: can
> we munmap() it assuming that the buffer size is the one returned in the `len'
> argument of io_read()? E.g.:
> 
>     err  = io_read (file, (data_t*)&data, len, offset, size);
>     munmap (data, *len);

Deallocation is always the job of the caller.  If MiG allocates buffers for
us, and we allocate new ones, mig needs to deallocate the buffers it
allocated.

Thanks,
Marcus

-- 
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Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org
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