From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- hurd/msgportdemux.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 hurd/msgportdemux.c (limited to 'hurd/msgportdemux.c') diff --git a/hurd/msgportdemux.c b/hurd/msgportdemux.c new file mode 100644 index 0000000000..ae783ef270 --- /dev/null +++ b/hurd/msgportdemux.c @@ -0,0 +1,66 @@ +/* Demux messages sent on the signal port. + +Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include + +struct demux + { + struct demux *next; + boolean_t (*demux) (mach_msg_header_t *inp, + mach_msg_header_t *outp); + }; + +struct demux *_hurd_msgport_demuxers = NULL; + +extern boolean_t __msg_server (mach_msg_header_t *inp, + mach_msg_header_t *outp); + +static boolean_t +msgport_server (mach_msg_header_t *inp, + mach_msg_header_t *outp) +{ + extern boolean_t _S_msg_server (mach_msg_header_t *inp, + mach_msg_header_t *outp); + extern boolean_t _S_exc_server (mach_msg_header_t *inp, + mach_msg_header_t *outp); + struct demux *d; + + for (d = _hurd_msgport_demuxers; d != NULL; d = d->next) + if ((*d->demux) (inp, outp)) + return 1; + + return (_S_exc_server (inp, outp) || + _S_msg_server (inp, outp)); +} + +/* This is the code that the signal thread runs. */ +void +_hurd_msgport_receive (void) +{ + /* Get our own sigstate cached so we never again have to take a lock to + fetch it. There is much code in hurdsig.c that operates with some + sigstate lock held, which will deadlock with _hurd_thread_sigstate. */ + (void) _hurd_self_sigstate (); + + while (1) + (void) __mach_msg_server (msgport_server, __vm_page_size, _hurd_msgport); +} -- cgit 1.4.1