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72e1a75071
* hurd/hurdsig.c (_hurdsig_init): If __hurd_threadvar_stack_mask is
nonzero, use cthread_fork to create the signal thread.
* hurd/msgportdemux.c (_hurd_msgport_receive): Initialize
_hurd_msgport_thread here (to self).
* sysdeps/mach/hurd/fork.c (__fork): When __hurd_sigthread_stack_end
is zero, instead compute child signal thread's starting SP from parent
signal thread's current SP and the threadvar_stack variables.
* hurd/Versions (GLIBC_2.1.3): Add cthread_fork, cthread_detach.
These are now referenced weakly by _hurdsig_init.
* hurd/report-wait.c (_S_msg_report_wait): Fix typo:
&_hurd_itimer_thread not &_hurd_msgport_thread.
1999-10-01 Roland McGrath <roland@baalperazim.frob.com>
* hurd/hurdfchdir.c (_hurd_change_directory_port_from_fd): Rewrite
without HURD_DPORT_USE to clean up warnings.
* hurd/dtable.c (get_dtable_port): Likewise.
* hurd/hurdioctl.c (rectty_dtable): Renamed to install_ctty.
(install_ctty): Do the changing of the cttyid port cell here, inside
the critical section while we holding the dtable lock.
(_hurd_setcttyid, tiocsctty, tiocnotty): Use that instead of changing
the port cell and calling rectty_dtable.
(_hurd_locked_install_cttyid): New function, split out of install_ctty.
(install_ctty): Use it inside a critical section, with the lock held.
* sysdeps/mach/hurd/setsid.c (__setsid): Use
_hurd_locked_install_cttyid to effect the cttyid and dtable changes
after proc_setsid, having held the dtable lock throughout.
* hurd/dtable.c (ctty_new_pgrp): With the dtable lock held, check the
cttyid port for null and bail out early if so. The dtable lock
serializes us after any cttyid change and its associated dtable update.
70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* Demux messages sent on the signal port.
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Copyright (C) 1991,92,94,95,97,99 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <hurd.h>
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#include <hurd/signal.h>
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#include <stddef.h>
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struct demux
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{
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struct demux *next;
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boolean_t (*demux) (mach_msg_header_t *inp,
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mach_msg_header_t *outp);
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};
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struct demux *_hurd_msgport_demuxers = NULL;
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extern boolean_t __msg_server (mach_msg_header_t *inp,
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mach_msg_header_t *outp);
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static boolean_t
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msgport_server (mach_msg_header_t *inp,
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mach_msg_header_t *outp)
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{
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extern boolean_t _S_msg_server (mach_msg_header_t *inp,
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mach_msg_header_t *outp);
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extern boolean_t _S_exc_server (mach_msg_header_t *inp,
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mach_msg_header_t *outp);
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struct demux *d;
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for (d = _hurd_msgport_demuxers; d != NULL; d = d->next)
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if ((*d->demux) (inp, outp))
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return 1;
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return (_S_exc_server (inp, outp) ||
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_S_msg_server (inp, outp));
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}
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/* This is the code that the signal thread runs. */
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void
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_hurd_msgport_receive (void)
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{
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/* Get our own sigstate cached so we never again have to take a lock to
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fetch it. There is much code in hurdsig.c that operates with some
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sigstate lock held, which will deadlock with _hurd_thread_sigstate.
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Furthermore, in the cthreads case this is the convenient spot
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to initialize _hurd_msgport_thread (see hurdsig.c:_hurdsig_init). */
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_hurd_msgport_thread = _hurd_self_sigstate ()->thread;
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while (1)
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(void) __mach_msg_server (msgport_server, __vm_page_size, _hurd_msgport);
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}
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