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sys/compat/linuxkpi/3.15/include/asm/atomic.h
- This file was added.
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/*- | |||||
* Copyright (c) 2010 Isilon Systems, Inc. | |||||
* Copyright (c) 2010 iX Systems, Inc. | |||||
* Copyright (c) 2010 Panasas, Inc. | |||||
* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice unmodified, this list of conditions, and the following | |||||
* disclaimer. | |||||
* 2. Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in the | |||||
* documentation and/or other materials provided with the distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |||||
*/ | |||||
#ifndef _ASM_ATOMIC_H_ | |||||
#define _ASM_ATOMIC_H_ | |||||
#include <linux/_linuxkpi_shim.h> | |||||
#include <sys/cdefs.h> | |||||
#include <sys/types.h> | |||||
#include <machine/atomic.h> | |||||
typedef struct { | |||||
volatile u_int counter; | |||||
} atomic_t; | |||||
#define atomic_add(i, v) atomic_add_return((i), (v)) | |||||
#define atomic_sub(i, v) atomic_sub_return((i), (v)) | |||||
#define atomic_inc_return(v) atomic_add_return(1, (v)) | |||||
#define atomic_add_negative(i, v) (atomic_add_return((i), (v)) < 0) | |||||
#define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0) | |||||
#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) | |||||
#define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0) | |||||
#define atomic_dec_return(v) atomic_sub_return(1, (v)) | |||||
#define atomic_add_return LINUXKPI_PREFIXED_SYM(atomic_add_return) | |||||
static inline int | |||||
atomic_add_return(int i, atomic_t *v) | |||||
{ | |||||
return i + atomic_fetchadd_int(&v->counter, i); | |||||
} | |||||
#define atomic_sub_return LINUXKPI_PREFIXED_SYM(atomic_sub_return) | |||||
static inline int | |||||
atomic_sub_return(int i, atomic_t *v) | |||||
{ | |||||
return atomic_fetchadd_int(&v->counter, -i) - i; | |||||
} | |||||
#define atomic_set LINUXKPI_PREFIXED_SYM(atomic_set) | |||||
static inline void | |||||
atomic_set(atomic_t *v, int i) | |||||
{ | |||||
atomic_store_rel_int(&v->counter, i); | |||||
} | |||||
#define atomic_read LINUXKPI_PREFIXED_SYM(atomic_read) | |||||
static inline int | |||||
atomic_read(atomic_t *v) | |||||
{ | |||||
return atomic_load_acq_int(&v->counter); | |||||
} | |||||
#define atomic_inc LINUXKPI_PREFIXED_SYM(atomic_inc) | |||||
static inline int | |||||
atomic_inc(atomic_t *v) | |||||
{ | |||||
return atomic_fetchadd_int(&v->counter, 1) + 1; | |||||
} | |||||
#define atomic_dec LINUXKPI_PREFIXED_SYM(atomic_dec) | |||||
static inline int | |||||
atomic_dec(atomic_t *v) | |||||
{ | |||||
return atomic_fetchadd_int(&v->counter, -1) - 1; | |||||
} | |||||
#define atomic_add_unless LINUXKPI_PREFIXED_SYM(atomic_add_unless) | |||||
static inline int atomic_add_unless(atomic_t *v, int a, int u) | |||||
{ | |||||
int c, old; | |||||
c = atomic_read(v); | |||||
for (;;) { | |||||
if (unlikely(c == (u))) | |||||
break; | |||||
old = atomic_cmpset_int(&v->counter, c, c + (a)); | |||||
if (likely(old == c)) | |||||
break; | |||||
c = old; | |||||
} | |||||
return c != (u); | |||||
} | |||||
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) | |||||
#endif /* _ASM_ATOMIC_H_ */ |