70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* Demux messages sent on the signal port.
|
|
Copyright (C) 1991,92,94,95,97,99 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <hurd.h>
|
|
#include <hurd/signal.h>
|
|
#include <stddef.h>
|
|
|
|
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.
|
|
|
|
Furthermore, in the cthreads case this is the convenient spot
|
|
to initialize _hurd_msgport_thread (see hurdsig.c:_hurdsig_init). */
|
|
|
|
_hurd_msgport_thread = _hurd_self_sigstate ()->thread;
|
|
|
|
while (1)
|
|
(void) __mach_msg_server (msgport_server, __vm_page_size, _hurd_msgport);
|
|
}
|