1 /* Demux messages sent on the signal port.
2 Copyright (C) 1991-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
20 #include <hurd/signal.h>
26 boolean_t (*demux
) (mach_msg_header_t
*inp
,
27 mach_msg_header_t
*outp
);
30 struct demux
*_hurd_msgport_demuxers
= NULL
;
32 extern boolean_t
__msg_server (mach_msg_header_t
*inp
,
33 mach_msg_header_t
*outp
);
36 msgport_server (mach_msg_header_t
*inp
,
37 mach_msg_header_t
*outp
)
39 extern boolean_t
_S_msg_server (mach_msg_header_t
*inp
,
40 mach_msg_header_t
*outp
);
41 extern boolean_t
_S_exc_server (mach_msg_header_t
*inp
,
42 mach_msg_header_t
*outp
);
45 for (d
= _hurd_msgport_demuxers
; d
!= NULL
; d
= d
->next
)
46 if ((*d
->demux
) (inp
, outp
))
49 return (_S_exc_server (inp
, outp
)
50 || _S_msg_server (inp
, outp
));
53 /* This is the code that the signal thread runs. */
55 _hurd_msgport_receive (void *arg
)
57 /* Get our own sigstate cached so we never again have to take a lock to
58 fetch it. There is much code in hurdsig.c that operates with some
59 sigstate lock held, which will deadlock with _hurd_thread_sigstate.
61 Furthermore, in the pthread case this is the convenient spot
62 to initialize _hurd_msgport_thread (see hurdsig.c:_hurdsig_init). */
64 _hurd_msgport_thread
= _hurd_self_sigstate ()->thread
;
67 (void) __mach_msg_server (msgport_server
, __vm_page_size
, _hurd_msgport
);