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610903b0cc
* sysdeps/mach/hurd/sigaction.c (__sigaction): Check ACT != NULL before
reading A.
* sysdeps/mach/hurd/sigsuspend.c (sigsuspend_not_cancel): Define alias
to __sigsuspend.
* sysdeps/mach/i386/sysdep.h: Include <dl-sysdep.h> and <tls.h>.
2006-06-13 Thomas Schwinge <tschwinge@gnu.org>
* sysdeps/mach/hurd/tls.h: Change `ASSEMBLER' conditional to
`__ASSEMBLER__'.
* sysdeps/mach/hurd/i386/tls.h: Likewise.
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/* Copyright (C) 1994, 1996, 2007 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _LOCK_INTERN_H
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#define _LOCK_INTERN_H
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#include <sys/cdefs.h>
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#include <machine-lock.h>
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#ifndef _EXTERN_INLINE
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#define _EXTERN_INLINE __extern_inline
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#endif
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/* Initialize LOCK. */
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_EXTERN_INLINE void
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__spin_lock_init (__spin_lock_t *__lock)
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{
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*__lock = __SPIN_LOCK_INITIALIZER;
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}
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/* Lock LOCK, blocking if we can't get it. */
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extern void __spin_lock_solid (__spin_lock_t *__lock);
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/* Lock the spin lock LOCK. */
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_EXTERN_INLINE void
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__spin_lock (__spin_lock_t *__lock)
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{
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if (! __spin_try_lock (__lock))
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__spin_lock_solid (__lock);
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}
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/* Name space-clean internal interface to mutex locks.
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Code internal to the C library uses these functions to lock and unlock
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mutex locks. These locks are of type `struct mutex', defined in
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<cthreads.h>. The functions here are name space-clean. If the program
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is linked with the cthreads library, `__mutex_lock_solid' and
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`__mutex_unlock_solid' will invoke the corresponding cthreads functions
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to implement real mutex locks. If not, simple stub versions just use
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spin locks. */
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/* Initialize the newly allocated mutex lock LOCK for further use. */
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extern void __mutex_init (void *__lock);
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/* Lock LOCK, blocking if we can't get it. */
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extern void __mutex_lock_solid (void *__lock);
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/* Finish unlocking LOCK, after the spin lock LOCK->held has already been
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unlocked. This function will wake up any thread waiting on LOCK. */
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extern void __mutex_unlock_solid (void *__lock);
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/* Lock the mutex lock LOCK. */
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_EXTERN_INLINE void
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__mutex_lock (void *__lock)
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{
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if (! __spin_try_lock ((__spin_lock_t *) __lock))
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__mutex_lock_solid (__lock);
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}
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/* Unlock the mutex lock LOCK. */
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_EXTERN_INLINE void
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__mutex_unlock (void *__lock)
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{
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__spin_unlock ((__spin_lock_t *) __lock);
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__mutex_unlock_solid (__lock);
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}
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_EXTERN_INLINE int
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__mutex_trylock (void *__lock)
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{
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return __spin_try_lock ((__spin_lock_t *) __lock);
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}
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#endif /* lock-intern.h */
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