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1 /* POSIX spinlock implementation. hppa version.
2 Copyright (C) 2000 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 License as
7 published by the Free Software Foundation; either version 2.1 of the
8 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; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
22 #include "internals.h"
25 __pthread_spin_lock (pthread_spinlock_t
*lock
)
30 asm volatile ("ldcw %1,%0"
31 : "=r" (val
), "=m" (*lock
)
37 weak_alias (__pthread_spin_lock
, pthread_spin_lock
)
41 __pthread_spin_trylock (pthread_spinlock_t
*lock
)
45 asm volatile ("ldcw %1,%0"
46 : "=r" (val
), "=m" (*lock
)
49 return val
? 0 : EBUSY
;
51 weak_alias (__pthread_spin_trylock
, pthread_spin_trylock
)
55 __pthread_spin_unlock (pthread_spinlock_t
*lock
)
60 weak_alias (__pthread_spin_unlock
, pthread_spin_unlock
)
64 __pthread_spin_init (pthread_spinlock_t
*lock
, int pshared
)
66 /* We can ignore the `pshared' parameter. Since we are busy-waiting
67 all processes which can access the memory location `lock' points
68 to can use the spinlock. */
72 weak_alias (__pthread_spin_init
, pthread_spin_init
)
76 __pthread_spin_destroy (pthread_spinlock_t
*lock
)
81 weak_alias (__pthread_spin_destroy
, pthread_spin_destroy
)