1/* SPDX-License-Identifier: GPL-2.0 */
 2/* atomic.h: These still suck, but the I-cache hit rate is higher.
 3 *
 4 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
 5 * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au)
 6 * Copyright (C) 2007 Kyle McMartin (kyle@parisc-linux.org)
 7 *
 8 * Additions by Keith M Wesolowski (wesolows@foobazco.org) based
 9 * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>.
10 */
11
12#ifndef __ARCH_SPARC_ATOMIC__
13#define __ARCH_SPARC_ATOMIC__
14
15#include <linux/types.h>
16
17#include <asm/cmpxchg.h>
18#include <asm/barrier.h>
19#include <asm-generic/atomic64.h>
20
21#define ATOMIC_INIT(i)  { (i) }
22
23int atomic_add_return(int, atomic_t *);
24int atomic_fetch_add(int, atomic_t *);
25int atomic_fetch_and(int, atomic_t *);
26int atomic_fetch_or(int, atomic_t *);
27int atomic_fetch_xor(int, atomic_t *);
28int atomic_cmpxchg(atomic_t *, int, int);
29int atomic_xchg(atomic_t *, int);
30int atomic_fetch_add_unless(atomic_t *, int, int);
31void atomic_set(atomic_t *, int);
32
33#define atomic_fetch_add_unless	atomic_fetch_add_unless
34
35#define atomic_set_release(v, i)	atomic_set((v), (i))
36
37#define atomic_read(v)          READ_ONCE((v)->counter)
38
39#define atomic_add(i, v)	((void)atomic_add_return( (int)(i), (v)))
40#define atomic_sub(i, v)	((void)atomic_add_return(-(int)(i), (v)))
41
42#define atomic_and(i, v)	((void)atomic_fetch_and((i), (v)))
43#define atomic_or(i, v)		((void)atomic_fetch_or((i), (v)))
44#define atomic_xor(i, v)	((void)atomic_fetch_xor((i), (v)))
45
46#define atomic_sub_return(i, v)	(atomic_add_return(-(int)(i), (v)))
47#define atomic_fetch_sub(i, v)  (atomic_fetch_add (-(int)(i), (v)))
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
48
49#endif /* !(__ARCH_SPARC_ATOMIC__) */

 
 1/* atomic.h: These still suck, but the I-cache hit rate is higher.
 2 *
 3 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
 4 * Copyright (C) 2000 Anton Blanchard (anton@linuxcare.com.au)
 5 * Copyright (C) 2007 Kyle McMartin (kyle@parisc-linux.org)
 6 *
 7 * Additions by Keith M Wesolowski (wesolows@foobazco.org) based
 8 * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>.
 9 */
10
11#ifndef __ARCH_SPARC_ATOMIC__
12#define __ARCH_SPARC_ATOMIC__
13
14#include <linux/types.h>
15
16#include <asm/cmpxchg.h>
17#include <asm/barrier.h>
18#include <asm-generic/atomic64.h>
19
20#define ATOMIC_INIT(i)  { (i) }
21
22int atomic_add_return(int, atomic_t *);
23void atomic_and(int, atomic_t *);
24void atomic_or(int, atomic_t *);
25void atomic_xor(int, atomic_t *);
 
26int atomic_cmpxchg(atomic_t *, int, int);
27int atomic_xchg(atomic_t *, int);
28int __atomic_add_unless(atomic_t *, int, int);
29void atomic_set(atomic_t *, int);
30
31#define atomic_read(v)          ACCESS_ONCE((v)->counter)
 
 
 
 
32
33#define atomic_add(i, v)	((void)atomic_add_return( (int)(i), (v)))
34#define atomic_sub(i, v)	((void)atomic_add_return(-(int)(i), (v)))
35#define atomic_inc(v)		((void)atomic_add_return(        1, (v)))
36#define atomic_dec(v)		((void)atomic_add_return(       -1, (v)))
 
 
37
38#define atomic_sub_return(i, v)	(atomic_add_return(-(int)(i), (v)))
39#define atomic_inc_return(v)	(atomic_add_return(        1, (v)))
40#define atomic_dec_return(v)	(atomic_add_return(       -1, (v)))
41
42#define atomic_add_negative(a, v)	(atomic_add_return((a), (v)) < 0)
43
44/*
45 * atomic_inc_and_test - increment and test
46 * @v: pointer of type atomic_t
47 *
48 * Atomically increments @v by 1
49 * and returns true if the result is zero, or false for all
50 * other cases.
51 */
52#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
53
54#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
55#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
56
57#endif /* !(__ARCH_SPARC_ATOMIC__) */