Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/hurd/msgportdemux.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
68 lines (54 sloc)
2.18 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Demux messages sent on the signal port. | |
Copyright (C) 1991-2016 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, see | |
<http://www.gnu.org/licenses/>. */ | |
#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); | |
} |