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From Joe Orton <jor...@redhat.com>
Subject Re: Regarding apr_file_writev() and locking...
Date Mon, 14 May 2007 10:01:42 GMT
On Fri, May 11, 2007 at 10:38:01PM -0300, Davi Arnaut wrote:
> The patches improves the locking interaction with buffering. But, quite
> frankly, the unix file_io locking and buffering is a bit messed. There
> is no clear indication which functions are protected by APR_XTHREAD,
> checks for partial writes on flushing are missing, buffering and file
> positioning don't play well together, et cetera.

I don't disagree that the existing buffering/mutex stuff is a mess, but 
nested mutexes are not available on all platforms, so they can't be 
relied upon.

> I am in the middle of writing a patch that converts all file_io to
> standard i/o functions (stdio/streams) so we can remove all code
> involving buffering, file positioning and even locking at some cases. It
> saves a huge amount of code lines, and I hope, gives fewer bugs.

A notable Unix platform has a crippled stdio implementation (32-bit 
Solaris), so this probably doesn't really fly either.

joe 

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