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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - arch/sparc/include/asm/atomic_32.h
1 /* atomic.h: These still suck, but the I-cache hit rate is higher.
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)
7 * Additions by Keith M Wesolowski (wesolows@foobazco.org) based
8 * on asm-parisc/atomic.h Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>.
11 #ifndef __ARCH_SPARC_ATOMIC__
12 #define __ARCH_SPARC_ATOMIC__
14 #include <linux/types.h>
16 #include <asm/cmpxchg.h>
17 #include <asm/barrier.h>
18 #include <asm-generic/atomic64.h>
20 #define ATOMIC_INIT(i) { (i) }
22 int atomic_add_return(int, atomic_t
*);
23 int atomic_fetch_add(int, atomic_t
*);
24 int atomic_fetch_and(int, atomic_t
*);
25 int atomic_fetch_or(int, atomic_t
*);
26 int atomic_fetch_xor(int, atomic_t
*);
27 int atomic_cmpxchg(atomic_t
*, int, int);
28 int atomic_xchg(atomic_t
*, int);
29 int __atomic_add_unless(atomic_t
*, int, int);
30 void atomic_set(atomic_t
*, int);
32 #define atomic_set_release(v, i) atomic_set((v), (i))
34 #define atomic_read(v) READ_ONCE((v)->counter)
36 #define atomic_add(i, v) ((void)atomic_add_return( (int)(i), (v)))
37 #define atomic_sub(i, v) ((void)atomic_add_return(-(int)(i), (v)))
38 #define atomic_inc(v) ((void)atomic_add_return( 1, (v)))
39 #define atomic_dec(v) ((void)atomic_add_return( -1, (v)))
41 #define atomic_and(i, v) ((void)atomic_fetch_and((i), (v)))
42 #define atomic_or(i, v) ((void)atomic_fetch_or((i), (v)))
43 #define atomic_xor(i, v) ((void)atomic_fetch_xor((i), (v)))
45 #define atomic_sub_return(i, v) (atomic_add_return(-(int)(i), (v)))
46 #define atomic_fetch_sub(i, v) (atomic_fetch_add (-(int)(i), (v)))
48 #define atomic_inc_return(v) (atomic_add_return( 1, (v)))
49 #define atomic_dec_return(v) (atomic_add_return( -1, (v)))
51 #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
54 * atomic_inc_and_test - increment and test
55 * @v: pointer of type atomic_t
57 * Atomically increments @v by 1
58 * and returns true if the result is zero, or false for all
61 #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
63 #define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
64 #define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
66 #endif /* !(__ARCH_SPARC_ATOMIC__) */