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=head1 NAME
MPMs - Multi-Processing Model Modules
=head1 Description
Discover what are the available MPMs and how they work with mod_perl.
META: This doc is under construction. Owners are wanted. -- pgollucci volunteering
=head1 MPMs Overview
=head1 The Worker MPM
META: incomplete
You can test whether running under threaded env via: C<?>
#ifdef USE_ITHREADS
/* whatever */
#endif
When the server is running under the threaded mpm
C<scfg-E<gt>threaded_mpm> is set to true.
Caveats:
All per-server data is shared between threads, regardless of locking,
changing the value of something like ap_document_root changes it for
all threads. Not just the current process/request, the way it was in
1.3. So we can't really support modification of things like
ap_document_root at request time, unless the mpm is prefork. we could
support modification of modperl per-server data by using
r-E<gt>request_config in the same way push_handlers et al is
implemented. But it is not possible to use this approach for anything
outside of modperl (ap_document_root for example).
=head1 The Prefork MPM
META: incomplete
=head1 The Event MPM
=head1 Maintainers
Maintainer is the person(s) you should contact with updates,
corrections and patches.
=over
=item *
Philip M. Gollucci E<lt>pgollucci (at) p6m7g8.comE<gt>
=back
=head1 Authors
=over
=item *
Stas Bekman [http://stason.org/]
Philip M. Gollucci E<lt>pgollucci (at) p6m7g8.comE<gt>
=back
Only the major authors are listed above. For contributors see the
Changes file.
=cut
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