2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifndef _OPENSOLARIS_SYS_ATOMIC_H_
30 #define _OPENSOLARIS_SYS_ATOMIC_H_
32 #include <sys/types.h>
33 #include <machine/atomic.h>
35 #define casptr(_a, _b, _c) \
36 atomic_cmpset_ptr((volatile uintptr_t *)(_a), (uintptr_t)(_b), (uintptr_t) (_c))
37 #define cas32 atomic_cmpset_32
39 #if !defined(__LP64__) && !defined(__mips_n32)
40 extern void atomic_add_64(volatile uint64_t *target, int64_t delta);
41 extern void atomic_dec_64(volatile uint64_t *target);
46 extern uint32_t atomic_cas_32(volatile uint32_t *target, uint32_t cmp,
48 extern uint64_t atomic_cas_64(volatile uint64_t *target, uint64_t cmp,
51 extern uint64_t atomic_add_64_nv(volatile uint64_t *target, int64_t delta);
52 extern uint8_t atomic_or_8_nv(volatile uint8_t *target, uint8_t value);
53 extern void membar_producer(void);
55 #if defined(__sparc64__) || defined(__powerpc__) || defined(__arm__) || \
57 extern void atomic_or_8(volatile uint8_t *target, uint8_t value);
60 atomic_or_8(volatile uint8_t *target, uint8_t value)
62 atomic_set_8(target, value);
66 static __inline uint32_t
67 atomic_add_32_nv(volatile uint32_t *target, int32_t delta)
69 return (atomic_fetchadd_32(target, delta) + delta);
73 atomic_add_int_nv(volatile u_int *target, int delta)
75 return (atomic_add_32_nv(target, delta));
79 atomic_dec_32(volatile uint32_t *target)
81 atomic_subtract_32(target, 1);
84 static __inline uint32_t
85 atomic_dec_32_nv(volatile uint32_t *target)
87 return (atomic_fetchadd_32(target, -1) - 1);
90 #if defined(__LP64__) || defined(__mips_n32)
92 atomic_dec_64(volatile uint64_t *target)
94 atomic_subtract_64(target, 1);
99 atomic_inc_32(volatile uint32_t *target)
101 atomic_add_32(target, 1);
104 static __inline uint32_t
105 atomic_inc_32_nv(volatile uint32_t *target)
107 return (atomic_add_32_nv(target, 1));
111 atomic_inc_64(volatile uint64_t *target)
113 atomic_add_64(target, 1);
116 static __inline uint64_t
117 atomic_inc_64_nv(volatile uint64_t *target)
119 return (atomic_add_64_nv(target, 1));
122 #if !defined(COMPAT_32BIT) && defined(__LP64__)
123 static __inline void *
124 atomic_cas_ptr(volatile void *target, void *cmp, void *newval)
126 return ((void *)atomic_cas_64((volatile uint64_t *)target,
127 (uint64_t)cmp, (uint64_t)newval));
130 static __inline void *
131 atomic_cas_ptr(volatile void *target, void *cmp, void *newval)
133 return ((void *)atomic_cas_32((volatile uint32_t *)target,
134 (uint32_t)cmp, (uint32_t)newval));
136 #endif /* !defined(COMPAT_32BIT) && defined(__LP64__) */
138 #endif /* !_OPENSOLARIS_SYS_ATOMIC_H_ */