mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 09:01:07 +00:00
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.
|
||
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, write to the Free
|
||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
02111-1307 USA. */
|
||
|
||
#ifndef _LOCK_INTERN_H
|
||
#define _LOCK_INTERN_H
|
||
|
||
#include <sys/cdefs.h>
|
||
#include <machine-lock.h>
|
||
|
||
#ifndef _EXTERN_INLINE
|
||
#define _EXTERN_INLINE __extern_inline
|
||
#endif
|
||
|
||
|
||
/* Initialize LOCK. */
|
||
|
||
_EXTERN_INLINE void
|
||
__spin_lock_init (__spin_lock_t *__lock)
|
||
{
|
||
*__lock = __SPIN_LOCK_INITIALIZER;
|
||
}
|
||
|
||
|
||
/* Lock LOCK, blocking if we can't get it. */
|
||
extern void __spin_lock_solid (__spin_lock_t *__lock);
|
||
|
||
/* Lock the spin lock LOCK. */
|
||
|
||
_EXTERN_INLINE void
|
||
__spin_lock (__spin_lock_t *__lock)
|
||
{
|
||
if (! __spin_try_lock (__lock))
|
||
__spin_lock_solid (__lock);
|
||
}
|
||
|
||
/* Name space-clean internal interface to mutex locks.
|
||
|
||
Code internal to the C library uses these functions to lock and unlock
|
||
mutex locks. These locks are of type `struct mutex', defined in
|
||
<cthreads.h>. The functions here are name space-clean. If the program
|
||
is linked with the cthreads library, `__mutex_lock_solid' and
|
||
`__mutex_unlock_solid' will invoke the corresponding cthreads functions
|
||
to implement real mutex locks. If not, simple stub versions just use
|
||
spin locks. */
|
||
|
||
|
||
/* Initialize the newly allocated mutex lock LOCK for further use. */
|
||
extern void __mutex_init (void *__lock);
|
||
|
||
/* Lock LOCK, blocking if we can't get it. */
|
||
extern void __mutex_lock_solid (void *__lock);
|
||
|
||
/* Finish unlocking LOCK, after the spin lock LOCK->held has already been
|
||
unlocked. This function will wake up any thread waiting on LOCK. */
|
||
extern void __mutex_unlock_solid (void *__lock);
|
||
|
||
/* Lock the mutex lock LOCK. */
|
||
|
||
_EXTERN_INLINE void
|
||
__mutex_lock (void *__lock)
|
||
{
|
||
if (! __spin_try_lock ((__spin_lock_t *) __lock))
|
||
__mutex_lock_solid (__lock);
|
||
}
|
||
|
||
/* Unlock the mutex lock LOCK. */
|
||
|
||
_EXTERN_INLINE void
|
||
__mutex_unlock (void *__lock)
|
||
{
|
||
__spin_unlock ((__spin_lock_t *) __lock);
|
||
__mutex_unlock_solid (__lock);
|
||
}
|
||
|
||
|
||
_EXTERN_INLINE int
|
||
__mutex_trylock (void *__lock)
|
||
{
|
||
return __spin_try_lock ((__spin_lock_t *) __lock);
|
||
}
|
||
|
||
#endif /* lock-intern.h */
|