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* hurd/Makefile (routines): Add hurdlock. * hurd/Versions (GLIBC_PRIVATE): Added new entry to export the above interface. (HURD_CTHREADS_0.3): Remove __libc_getspecific. * hurd/hurdpid.c: Include <lowlevellock.h> (_S_msg_proc_newids): Use lll_wait to synchronize. * hurd/hurdsig.c: (reauth_proc): Use __mutex_lock and __mutex_unlock. * hurd/setauth.c: Include <hurdlock.h>, use integer for synchronization. * mach/Makefile (lock-headers): Remove machine-lock.h. * mach/lock-intern.h: Include <lowlevellock.h> instead of <machine-lock.h>. (__spin_lock_t): New type. (__SPIN_LOCK_INITIALIZER): New macro. (__spin_lock, __spin_unlock, __spin_try_lock, __spin_lock_locked, __mutex_init, __mutex_lock_solid, __mutex_unlock_solid, __mutex_lock, __mutex_unlock, __mutex_trylock): Use lll to implement locks. * mach/mutex-init.c: Include <lowlevellock.h> instead of <cthreads.h>. (__mutex_init): Initialize with lll. * manual/errno.texi (EOWNERDEAD, ENOTRECOVERABLE): New errno values. * sysdeps/mach/Makefile: Add libmachuser as dependencies for libs needing lll. * sysdeps/mach/hurd/bits/errno.h: Regenerate. * sysdeps/mach/hurd/cthreads.c (__libc_getspecific): Remove function. * sysdeps/mach/hurd/bits/libc-lock.h: Remove file. * sysdeps/mach/hurd/setpgid.c: Include <lowlevellock.h>. (__setpgid): Use lll for synchronization. * sysdeps/mach/hurd/setsid.c: Likewise with __setsid. * sysdeps/mach/bits/libc-lock.h: Include <tls.h> and <lowlevellock.h> instead of <cthreads.h>. (_IO_lock_inexpensive): New macro (__libc_lock_recursive_t, __rtld_lock_recursive_t): New structures. (__libc_lock_self0): New declaration. (__libc_lock_owner_self): New macro. (__libc_key_t): Remove type. (_LIBC_LOCK_INITIALIZER): New macro. (__libc_lock_define_initialized, __libc_lock_init, __libc_lock_fini, __libc_lock_fini_recursive, __rtld_lock_fini_recursive, __libc_lock_lock, __libc_lock_trylock, __libc_lock_unlock, __libc_lock_define_initialized_recursive, __rtld_lock_define_initialized_recursive, __libc_lock_init_recursive, __libc_lock_trylock_recursive, __libc_lock_lock_recursive, __libc_lock_unlock_recursive, __rtld_lock_initialize, __rtld_lock_trylock_recursive, __rtld_lock_lock_recursive, __rtld_lock_unlock_recursive __libc_once_define, __libc_mutex_unlock): Reimplement with lll. (__libc_lock_define_recursive, __rtld_lock_define_recursive, _LIBC_LOCK_RECURSIVE_INITIALIZER, _RTLD_LOCK_RECURSIVE_INITIALIZER): New macros. Include <libc-lockP.h> to reimplement libc_key* with pthread_key*. * hurd/hurdlock.c: New file. * hurd/hurdlock.h: New file. * mach/lowlevellock.h: New file
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/* Copyright (C) 1993-2018 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/port.h>
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#include <hurd/fd.h>
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#include <hurd/ioctl.h>
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#include <lowlevellock.h>
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/* Create a new session with the calling process as its leader.
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The process group IDs of the session and the calling process
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are set to the process ID of the calling process, which is returned. */
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pid_t
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__setsid (void)
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{
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error_t err;
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unsigned int stamp;
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_dtable_lock);
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stamp = _hurd_pids_changed_stamp; /* Atomic fetch. */
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/* Tell the proc server we want to start a new session. */
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err = __USEPORT (PROC, __proc_setsid (port));
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if (err)
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__mutex_unlock (&_hurd_dtable_lock);
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else
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{
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/* Punt our current ctty, and update the dtable accordingly. We hold
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the dtable lock from before the proc_setsid call through clearing
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the cttyid port and processing the dtable, so that we can be sure
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that it's all done by the time the signal thread processes the
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pgrp change notification. */
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_hurd_locked_install_cttyid (MACH_PORT_NULL);
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/* Synchronize with the signal thread to make sure we have received
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and processed proc_newids before returning to the user.
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This is necessary to ensure that _hurd_pgrp (and thus the value
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returned by `getpgrp ()' in other threads) has been updated before
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we return. */
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while (_hurd_pids_changed_stamp == stamp)
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lll_wait (&_hurd_pids_changed_stamp, stamp, 0);
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}
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HURD_CRITICAL_END;
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return err ? __hurd_fail (err) : _hurd_pgrp;
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}
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weak_alias (__setsid, setsid)
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