/usr/include/xenomai/asm-arm/atomic.h is in libxenomai-dev 2.6.4+dfsg-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | /*
* Copyright (C) 2003,2004 Philippe Gerum <rpm@xenomai.org>.
*
* ARM port
* Copyright (C) 2005 Stelian Pop
*
* Xenomai is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* Xenomai 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Xenomai; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _XENO_ASM_ARM_ATOMIC_H
#define _XENO_ASM_ARM_ATOMIC_H
#include <asm/xenomai/features.h>
typedef struct { unsigned long counter; } xnarch_atomic_t;
typedef xnarch_atomic_t atomic_counter_t;
typedef unsigned long atomic_flags_t;
#define xnarch_atomic_get(v) (*(volatile unsigned long *)(&(v)->counter))
static __inline__ void
xnarch_atomic_set(xnarch_atomic_t *ptr, unsigned long val)
{
ptr->counter = val;
}
#ifdef CONFIG_XENO_ATOMIC_BUILTINS
#define xnarch_memory_barrier() __sync_synchronize()
#define xnarch_read_memory_barrier() xnarch_memory_barrier()
#define xnarch_write_memory_barrier() xnarch_memory_barrier()
#define cpu_relax() xnarch_memory_barrier()
#define xnarch_atomic_cmpxchg(v, o, n) \
__sync_val_compare_and_swap(&(v)->counter, \
(unsigned long)(o), \
(unsigned long)(n))
#else /* !CONFIG_XENO_ATOMIC_BUILTINS */
#include <asm/xenomai/atomic_asm.h>
#endif /* !CONFIG_XENO_ATOMIC_BUILTINS */
#endif /* !_XENO_ASM_ARM_ATOMIC_H */
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