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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_ATOMIC_H
#define _SYS_ATOMIC_H
#include <sys/types.h>
#include <sys/inttypes.h>
#ifdef __cplusplus
extern "C" {
#endif
#if defined(__STDC__)
/*
* Increment target.
*/
extern void atomic_inc_8(volatile uint8_t *);
extern void atomic_inc_uchar(volatile uchar_t *);
extern void atomic_inc_16(volatile uint16_t *);
extern void atomic_inc_ushort(volatile ushort_t *);
extern void atomic_inc_32(volatile uint32_t *);
extern void atomic_inc_uint(volatile uint_t *);
extern void atomic_inc_ulong(volatile ulong_t *);
#if defined(_INT64_TYPE)
extern void atomic_inc_64(volatile uint64_t *);
#endif
/*
* Decrement target
*/
extern void atomic_dec_8(volatile uint8_t *);
extern void atomic_dec_uchar(volatile uchar_t *);
extern void atomic_dec_16(volatile uint16_t *);
extern void atomic_dec_ushort(volatile ushort_t *);
extern void atomic_dec_32(volatile uint32_t *);
extern void atomic_dec_uint(volatile uint_t *);
extern void atomic_dec_ulong(volatile ulong_t *);
#if defined(_INT64_TYPE)
extern void atomic_dec_64(volatile uint64_t *);
#endif
/*
* Add delta to target
*/
extern void atomic_add_8(volatile uint8_t *, int8_t);
extern void atomic_add_char(volatile uchar_t *, signed char);
extern void atomic_add_16(volatile uint16_t *, int16_t);
extern void atomic_add_short(volatile ushort_t *, short);
extern void atomic_add_32(volatile uint32_t *, int32_t);
extern void atomic_add_int(volatile uint_t *, int);
extern void atomic_add_ptr(volatile void *, ssize_t);
extern void atomic_add_long(volatile ulong_t *, long);
#if defined(_INT64_TYPE)
extern void atomic_add_64(volatile uint64_t *, int64_t);
#endif
/*
* logical OR bits with target
*/
extern void atomic_or_8(volatile uint8_t *, uint8_t);
extern void atomic_or_uchar(volatile uchar_t *, uchar_t);
extern void atomic_or_16(volatile uint16_t *, uint16_t);
extern void atomic_or_ushort(volatile ushort_t *, ushort_t);
extern void atomic_or_32(volatile uint32_t *, uint32_t);
extern void atomic_or_uint(volatile uint_t *, uint_t);
extern void atomic_or_ulong(volatile ulong_t *, ulong_t);
#if defined(_INT64_TYPE)
extern void atomic_or_64(volatile uint64_t *, uint64_t);
#endif
/*
* logical AND bits with target
*/
extern void atomic_and_8(volatile uint8_t *, uint8_t);
extern void atomic_and_uchar(volatile uchar_t *, uchar_t);
extern void atomic_and_16(volatile uint16_t *, uint16_t);
extern void atomic_and_ushort(volatile ushort_t *, ushort_t);
extern void atomic_and_32(volatile uint32_t *, uint32_t);
extern void atomic_and_uint(volatile uint_t *, uint_t);
extern void atomic_and_ulong(volatile ulong_t *, ulong_t);
#if defined(_INT64_TYPE)
extern void atomic_and_64(volatile uint64_t *, uint64_t);
#endif
/*
* As above, but return the new value. Note that these _nv() variants are
* substantially more expensive on some platforms than the no-return-value
* versions above, so don't use them unless you really need to know the
* new value *atomically* (e.g. when decrementing a reference count and
* checking whether it went to zero).
*/
/*
* Increment target and return new value.
*/
extern uint8_t atomic_inc_8_nv(volatile uint8_t *);
extern uchar_t atomic_inc_uchar_nv(volatile uchar_t *);
extern uint16_t atomic_inc_16_nv(volatile uint16_t *);
extern ushort_t atomic_inc_ushort_nv(volatile ushort_t *);
extern uint32_t atomic_inc_32_nv(volatile uint32_t *);
extern uint_t atomic_inc_uint_nv(volatile uint_t *);
extern ulong_t atomic_inc_ulong_nv(volatile ulong_t *);
#if defined(_INT64_TYPE)
extern uint64_t atomic_inc_64_nv(volatile uint64_t *);
#endif
/*
* Decrement target and return new value.
*/
extern uint8_t atomic_dec_8_nv(volatile uint8_t *);
extern uchar_t atomic_dec_uchar_nv(volatile uchar_t *);
extern uint16_t atomic_dec_16_nv(volatile uint16_t *);
extern ushort_t atomic_dec_ushort_nv(volatile ushort_t *);
extern uint32_t atomic_dec_32_nv(volatile uint32_t *);
extern uint_t atomic_dec_uint_nv(volatile uint_t *);
extern ulong_t atomic_dec_ulong_nv(volatile ulong_t *);
#if defined(_INT64_TYPE)
extern uint64_t atomic_dec_64_nv(volatile uint64_t *);
#endif
/*
* Add delta to target
*/
extern uint8_t atomic_add_8_nv(volatile uint8_t *, int8_t);
extern uchar_t atomic_add_char_nv(volatile uchar_t *, signed char);
extern uint16_t atomic_add_16_nv(volatile uint16_t *, int16_t);
extern ushort_t atomic_add_short_nv(volatile ushort_t *, short);
extern uint32_t atomic_add_32_nv(volatile uint32_t *, int32_t);
extern uint_t atomic_add_int_nv(volatile uint_t *, int);
extern void *atomic_add_ptr_nv(volatile void *, ssize_t);
extern ulong_t atomic_add_long_nv(volatile ulong_t *, long);
#if defined(_INT64_TYPE)
extern uint64_t atomic_add_64_nv(volatile uint64_t *, int64_t);
#endif
/*
* logical OR bits with target and return new value.
*/
extern uint8_t atomic_or_8_nv(volatile uint8_t *, uint8_t);
extern uchar_t atomic_or_uchar_nv(volatile uchar_t *, uchar_t);
extern uint16_t atomic_or_16_nv(volatile uint16_t *, uint16_t);
extern ushort_t atomic_or_ushort_nv(volatile ushort_t *, ushort_t);
extern uint32_t atomic_or_32_nv(volatile uint32_t *, uint32_t);
extern uint_t atomic_or_uint_nv(volatile uint_t *, uint_t);
extern ulong_t atomic_or_ulong_nv(volatile ulong_t *, ulong_t);
#if defined(_INT64_TYPE)
extern uint64_t atomic_or_64_nv(volatile uint64_t *, uint64_t);
#endif
/*
* logical AND bits with target and return new value.
*/
extern uint8_t atomic_and_8_nv(volatile uint8_t *, uint8_t);
extern uchar_t atomic_and_uchar_nv(volatile uchar_t *, uchar_t);
extern uint16_t atomic_and_16_nv(volatile uint16_t *, uint16_t);
extern ushort_t atomic_and_ushort_nv(volatile ushort_t *, ushort_t);
extern uint32_t atomic_and_32_nv(volatile uint32_t *, uint32_t);
extern uint_t atomic_and_uint_nv(volatile uint_t *, uint_t);
extern ulong_t atomic_and_ulong_nv(volatile ulong_t *, ulong_t);
#if defined(_INT64_TYPE)
extern uint64_t atomic_and_64_nv(volatile uint64_t *, uint64_t);
#endif
/*
* If *arg1 == arg2, set *arg1 = arg3; return old value
*/
extern uint8_t atomic_cas_8(volatile uint8_t *, uint8_t, uint8_t);
extern uchar_t atomic_cas_uchar(volatile uchar_t *, uchar_t, uchar_t);
extern uint16_t atomic_cas_16(volatile uint16_t *, uint16_t, uint16_t);
extern ushort_t atomic_cas_ushort(volatile ushort_t *, ushort_t, ushort_t);
extern uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t);
extern uint_t atomic_cas_uint(volatile uint_t *, uint_t, uint_t);
extern void *atomic_cas_ptr(volatile void *, void *, void *);
extern ulong_t atomic_cas_ulong(volatile ulong_t *, ulong_t, ulong_t);
#if defined(_INT64_TYPE)
extern uint64_t atomic_cas_64(volatile uint64_t *, uint64_t, uint64_t);
#endif
/*
* Swap target and return old value
*/
extern uint8_t atomic_swap_8(volatile uint8_t *, uint8_t);
extern uchar_t atomic_swap_uchar(volatile uchar_t *, uchar_t);
extern uint16_t atomic_swap_16(volatile uint16_t *, uint16_t);
extern ushort_t atomic_swap_ushort(volatile ushort_t *, ushort_t);
extern uint32_t atomic_swap_32(volatile uint32_t *, uint32_t);
extern uint_t atomic_swap_uint(volatile uint_t *, uint_t);
extern void *atomic_swap_ptr(volatile void *, void *);
extern ulong_t atomic_swap_ulong(volatile ulong_t *, ulong_t);
#if defined(_INT64_TYPE)
extern uint64_t atomic_swap_64(volatile uint64_t *, uint64_t);
#endif
/*
* Perform an exclusive atomic bit set/clear on a target.
* Returns 0 if bit was sucessfully set/cleared, or -1
* if the bit was already set/cleared.
*/
extern int atomic_set_long_excl(volatile ulong_t *, uint_t);
extern int atomic_clear_long_excl(volatile ulong_t *, uint_t);
/*
* Generic memory barrier used during lock entry, placed after the
* memory operation that acquires the lock to guarantee that the lock
* protects its data. No stores from after the memory barrier will
* reach visibility, and no loads from after the barrier will be
* resolved, before the lock acquisition reaches global visibility.
*/
extern void membar_enter(void);
/*
* Generic memory barrier used during lock exit, placed before the
* memory operation that releases the lock to guarantee that the lock
* protects its data. All loads and stores issued before the barrier
* will be resolved before the subsequent lock update reaches visibility.
*/
extern void membar_exit(void);
/*
* Arrange that all stores issued before this point in the code reach
* global visibility before any stores that follow; useful in producer
* modules that update a data item, then set a flag that it is available.
* The memory barrier guarantees that the available flag is not visible
* earlier than the updated data, i.e. it imposes store ordering.
*/
extern void membar_producer(void);
/*
* Arrange that all loads issued before this point in the code are
* completed before any subsequent loads; useful in consumer modules
* that check to see if data is available and read the data.
* The memory barrier guarantees that the data is not sampled until
* after the available flag has been seen, i.e. it imposes load ordering.
*/
extern void membar_consumer(void);
#endif /* __STDC__ */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ATOMIC_H */
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