1 /* Machine-specific definition for spin locks. HPPA version.
2 Copyright (C) 1995, 1997 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, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 #ifndef _MACHINE_LOCK_H
21 #define _MACHINE_LOCK_H
23 /* The type of a spin lock variable. */
25 typedef __volatile
int __spin_lock_t
__attribute__ ((__aligned__ (16)));
27 /* Value to initialize `__spin_lock_t' variables to. */
29 #define __SPIN_LOCK_INITIALIZER -1
32 #ifndef _EXTERN_INLINE
33 #define _EXTERN_INLINE extern __inline
39 __spin_unlock (__spin_lock_t
*__lock
)
44 /* Try to lock LOCK; return nonzero if we locked it, zero if another has. */
47 __spin_try_lock (__spin_lock_t
*__lock
)
49 register int __result
;
50 __asm__
__volatile__ ("ldcws %0, %1" : "=m" (*__lock
), "=r" (__result
));
54 /* Return nonzero if LOCK is locked. */
57 __spin_lock_locked (__spin_lock_t
*__lock
)
63 #endif /* machine-lock.h */