500 lines
12 KiB
C
500 lines
12 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License, Version 1.0 only
|
|
* (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 (c) 2009 by Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
#include <atomic.h>
|
|
#include <assert.h>
|
|
#include <pthread.h>
|
|
|
|
/*
|
|
* All operations are implemented by serializing them through a global
|
|
* pthread mutex. This provides a correct generic implementation.
|
|
* However all supported architectures are encouraged to provide a
|
|
* native implementation is assembly for performance reasons.
|
|
*/
|
|
pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
/*
|
|
* These are the void returning variants
|
|
*/
|
|
/* BEGIN CSTYLED */
|
|
#define ATOMIC_INC(name, type) \
|
|
void atomic_inc_##name(volatile type *target) \
|
|
{ \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
(*target)++; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
}
|
|
|
|
ATOMIC_INC(long, unsigned long)
|
|
ATOMIC_INC(8, uint8_t)
|
|
ATOMIC_INC(uchar, uchar_t)
|
|
ATOMIC_INC(16, uint16_t)
|
|
ATOMIC_INC(ushort, ushort_t)
|
|
ATOMIC_INC(32, uint32_t)
|
|
ATOMIC_INC(uint, uint_t)
|
|
ATOMIC_INC(ulong, ulong_t)
|
|
ATOMIC_INC(64, uint64_t)
|
|
|
|
|
|
#define ATOMIC_DEC(name, type) \
|
|
void atomic_dec_##name(volatile type *target) \
|
|
{ \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
(*target)--; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
}
|
|
|
|
ATOMIC_DEC(long, unsigned long)
|
|
ATOMIC_DEC(8, uint8_t)
|
|
ATOMIC_DEC(uchar, uchar_t)
|
|
ATOMIC_DEC(16, uint16_t)
|
|
ATOMIC_DEC(ushort, ushort_t)
|
|
ATOMIC_DEC(32, uint32_t)
|
|
ATOMIC_DEC(uint, uint_t)
|
|
ATOMIC_DEC(ulong, ulong_t)
|
|
ATOMIC_DEC(64, uint64_t)
|
|
|
|
|
|
#define ATOMIC_ADD(name, type1, type2) \
|
|
void atomic_add_##name(volatile type1 *target, type2 bits) \
|
|
{ \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
*target += bits; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
}
|
|
|
|
ATOMIC_ADD(8, uint8_t, int8_t)
|
|
ATOMIC_ADD(char, uchar_t, signed char)
|
|
ATOMIC_ADD(16, uint16_t, int16_t)
|
|
ATOMIC_ADD(short, ushort_t, short)
|
|
ATOMIC_ADD(32, uint32_t, int32_t)
|
|
ATOMIC_ADD(int, uint_t, int)
|
|
ATOMIC_ADD(long, ulong_t, long)
|
|
ATOMIC_ADD(64, uint64_t, int64_t)
|
|
|
|
void
|
|
atomic_add_ptr(volatile void *target, ssize_t bits)
|
|
{
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
*(caddr_t *)target += bits;
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
}
|
|
|
|
|
|
#define ATOMIC_SUB(name, type1, type2) \
|
|
void atomic_sub_##name(volatile type1 *target, type2 bits) \
|
|
{ \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
*target -= bits; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
}
|
|
|
|
ATOMIC_SUB(8, uint8_t, int8_t)
|
|
ATOMIC_SUB(char, uchar_t, signed char)
|
|
ATOMIC_SUB(16, uint16_t, int16_t)
|
|
ATOMIC_SUB(short, ushort_t, short)
|
|
ATOMIC_SUB(32, uint32_t, int32_t)
|
|
ATOMIC_SUB(int, uint_t, int)
|
|
ATOMIC_SUB(long, ulong_t, long)
|
|
ATOMIC_SUB(64, uint64_t, int64_t)
|
|
|
|
void
|
|
atomic_sub_ptr(volatile void *target, ssize_t bits)
|
|
{
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
*(caddr_t *)target -= bits;
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
}
|
|
|
|
|
|
#define ATOMIC_OR(name, type) \
|
|
void atomic_or_##name(volatile type *target, type bits) \
|
|
{ \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
*target |= bits; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
}
|
|
|
|
ATOMIC_OR(8, uint8_t)
|
|
ATOMIC_OR(uchar, uchar_t)
|
|
ATOMIC_OR(16, uint16_t)
|
|
ATOMIC_OR(ushort, ushort_t)
|
|
ATOMIC_OR(32, uint32_t)
|
|
ATOMIC_OR(uint, uint_t)
|
|
ATOMIC_OR(ulong, ulong_t)
|
|
ATOMIC_OR(64, uint64_t)
|
|
|
|
|
|
#define ATOMIC_AND(name, type) \
|
|
void atomic_and_##name(volatile type *target, type bits) \
|
|
{ \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
*target &= bits; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
}
|
|
|
|
ATOMIC_AND(8, uint8_t)
|
|
ATOMIC_AND(uchar, uchar_t)
|
|
ATOMIC_AND(16, uint16_t)
|
|
ATOMIC_AND(ushort, ushort_t)
|
|
ATOMIC_AND(32, uint32_t)
|
|
ATOMIC_AND(uint, uint_t)
|
|
ATOMIC_AND(ulong, ulong_t)
|
|
ATOMIC_AND(64, uint64_t)
|
|
|
|
|
|
/*
|
|
* New value returning variants
|
|
*/
|
|
|
|
#define ATOMIC_INC_NV(name, type) \
|
|
type atomic_inc_##name##_nv(volatile type *target) \
|
|
{ \
|
|
type rc; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
rc = (++(*target)); \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (rc); \
|
|
}
|
|
|
|
ATOMIC_INC_NV(long, unsigned long)
|
|
ATOMIC_INC_NV(8, uint8_t)
|
|
ATOMIC_INC_NV(uchar, uchar_t)
|
|
ATOMIC_INC_NV(16, uint16_t)
|
|
ATOMIC_INC_NV(ushort, ushort_t)
|
|
ATOMIC_INC_NV(32, uint32_t)
|
|
ATOMIC_INC_NV(uint, uint_t)
|
|
ATOMIC_INC_NV(ulong, ulong_t)
|
|
ATOMIC_INC_NV(64, uint64_t)
|
|
|
|
|
|
#define ATOMIC_DEC_NV(name, type) \
|
|
type atomic_dec_##name##_nv(volatile type *target) \
|
|
{ \
|
|
type rc; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
rc = (--(*target)); \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (rc); \
|
|
}
|
|
|
|
ATOMIC_DEC_NV(long, unsigned long)
|
|
ATOMIC_DEC_NV(8, uint8_t)
|
|
ATOMIC_DEC_NV(uchar, uchar_t)
|
|
ATOMIC_DEC_NV(16, uint16_t)
|
|
ATOMIC_DEC_NV(ushort, ushort_t)
|
|
ATOMIC_DEC_NV(32, uint32_t)
|
|
ATOMIC_DEC_NV(uint, uint_t)
|
|
ATOMIC_DEC_NV(ulong, ulong_t)
|
|
ATOMIC_DEC_NV(64, uint64_t)
|
|
|
|
|
|
#define ATOMIC_ADD_NV(name, type1, type2) \
|
|
type1 atomic_add_##name##_nv(volatile type1 *target, type2 bits)\
|
|
{ \
|
|
type1 rc; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
rc = (*target += bits); \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (rc); \
|
|
}
|
|
|
|
ATOMIC_ADD_NV(8, uint8_t, int8_t)
|
|
ATOMIC_ADD_NV(char, uchar_t, signed char)
|
|
ATOMIC_ADD_NV(16, uint16_t, int16_t)
|
|
ATOMIC_ADD_NV(short, ushort_t, short)
|
|
ATOMIC_ADD_NV(32, uint32_t, int32_t)
|
|
ATOMIC_ADD_NV(int, uint_t, int)
|
|
ATOMIC_ADD_NV(long, ulong_t, long)
|
|
ATOMIC_ADD_NV(64, uint64_t, int64_t)
|
|
|
|
void *
|
|
atomic_add_ptr_nv(volatile void *target, ssize_t bits)
|
|
{
|
|
void *ptr;
|
|
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
ptr = (*(caddr_t *)target += bits);
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
|
|
return (ptr);
|
|
}
|
|
|
|
|
|
#define ATOMIC_SUB_NV(name, type1, type2) \
|
|
type1 atomic_sub_##name##_nv(volatile type1 *target, type2 bits)\
|
|
{ \
|
|
type1 rc; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
rc = (*target -= bits); \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (rc); \
|
|
}
|
|
|
|
ATOMIC_SUB_NV(8, uint8_t, int8_t)
|
|
ATOMIC_SUB_NV(char, uchar_t, signed char)
|
|
ATOMIC_SUB_NV(16, uint16_t, int16_t)
|
|
ATOMIC_SUB_NV(short, ushort_t, short)
|
|
ATOMIC_SUB_NV(32, uint32_t, int32_t)
|
|
ATOMIC_SUB_NV(int, uint_t, int)
|
|
ATOMIC_SUB_NV(long, ulong_t, long)
|
|
ATOMIC_SUB_NV(64, uint64_t, int64_t)
|
|
|
|
void *
|
|
atomic_sub_ptr_nv(volatile void *target, ssize_t bits)
|
|
{
|
|
void *ptr;
|
|
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
ptr = (*(caddr_t *)target -= bits);
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
|
|
return (ptr);
|
|
}
|
|
|
|
|
|
#define ATOMIC_OR_NV(name, type) \
|
|
type atomic_or_##name##_nv(volatile type *target, type bits) \
|
|
{ \
|
|
type rc; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
rc = (*target |= bits); \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (rc); \
|
|
}
|
|
|
|
ATOMIC_OR_NV(long, unsigned long)
|
|
ATOMIC_OR_NV(8, uint8_t)
|
|
ATOMIC_OR_NV(uchar, uchar_t)
|
|
ATOMIC_OR_NV(16, uint16_t)
|
|
ATOMIC_OR_NV(ushort, ushort_t)
|
|
ATOMIC_OR_NV(32, uint32_t)
|
|
ATOMIC_OR_NV(uint, uint_t)
|
|
ATOMIC_OR_NV(ulong, ulong_t)
|
|
ATOMIC_OR_NV(64, uint64_t)
|
|
|
|
|
|
#define ATOMIC_AND_NV(name, type) \
|
|
type atomic_and_##name##_nv(volatile type *target, type bits) \
|
|
{ \
|
|
type rc; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
rc = (*target &= bits); \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (rc); \
|
|
}
|
|
|
|
ATOMIC_AND_NV(long, unsigned long)
|
|
ATOMIC_AND_NV(8, uint8_t)
|
|
ATOMIC_AND_NV(uchar, uchar_t)
|
|
ATOMIC_AND_NV(16, uint16_t)
|
|
ATOMIC_AND_NV(ushort, ushort_t)
|
|
ATOMIC_AND_NV(32, uint32_t)
|
|
ATOMIC_AND_NV(uint, uint_t)
|
|
ATOMIC_AND_NV(ulong, ulong_t)
|
|
ATOMIC_AND_NV(64, uint64_t)
|
|
|
|
|
|
/*
|
|
* If *arg1 == arg2, set *arg1 = arg3; return old value
|
|
*/
|
|
|
|
#define ATOMIC_CAS(name, type) \
|
|
type atomic_cas_##name(volatile type *target, type arg1, type arg2) \
|
|
{ \
|
|
type old; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
old = *target; \
|
|
if (old == arg1) \
|
|
*target = arg2; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (old); \
|
|
}
|
|
|
|
ATOMIC_CAS(8, uint8_t)
|
|
ATOMIC_CAS(uchar, uchar_t)
|
|
ATOMIC_CAS(16, uint16_t)
|
|
ATOMIC_CAS(ushort, ushort_t)
|
|
ATOMIC_CAS(32, uint32_t)
|
|
ATOMIC_CAS(uint, uint_t)
|
|
ATOMIC_CAS(ulong, ulong_t)
|
|
ATOMIC_CAS(64, uint64_t)
|
|
|
|
void *
|
|
atomic_cas_ptr(volatile void *target, void *arg1, void *arg2)
|
|
{
|
|
void *old;
|
|
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
old = *(void **)target;
|
|
if (old == arg1)
|
|
*(void **)target = arg2;
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
|
|
return (old);
|
|
}
|
|
|
|
|
|
/*
|
|
* Swap target and return old value
|
|
*/
|
|
|
|
#define ATOMIC_SWAP(name, type) \
|
|
type atomic_swap_##name(volatile type *target, type bits) \
|
|
{ \
|
|
type old; \
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
|
|
old = *target; \
|
|
*target = bits; \
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
|
|
return (old); \
|
|
}
|
|
|
|
ATOMIC_SWAP(8, uint8_t)
|
|
ATOMIC_SWAP(uchar, uchar_t)
|
|
ATOMIC_SWAP(16, uint16_t)
|
|
ATOMIC_SWAP(ushort, ushort_t)
|
|
ATOMIC_SWAP(32, uint32_t)
|
|
ATOMIC_SWAP(uint, uint_t)
|
|
ATOMIC_SWAP(ulong, ulong_t)
|
|
ATOMIC_SWAP(64, uint64_t)
|
|
/* END CSTYLED */
|
|
|
|
void *
|
|
atomic_swap_ptr(volatile void *target, void *bits)
|
|
{
|
|
void *old;
|
|
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
old = *(void **)target;
|
|
*(void **)target = bits;
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
|
|
return (old);
|
|
}
|
|
|
|
|
|
int
|
|
atomic_set_long_excl(volatile ulong_t *target, uint_t value)
|
|
{
|
|
ulong_t bit;
|
|
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
bit = (1UL << value);
|
|
if ((*target & bit) != 0) {
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
return (-1);
|
|
}
|
|
*target |= bit;
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
atomic_clear_long_excl(volatile ulong_t *target, uint_t value)
|
|
{
|
|
ulong_t bit;
|
|
|
|
VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
|
|
bit = (1UL << value);
|
|
if ((*target & bit) != 0) {
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
return (-1);
|
|
}
|
|
*target &= ~bit;
|
|
VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
membar_enter(void)
|
|
{
|
|
/* XXX - Implement me */
|
|
}
|
|
|
|
void
|
|
membar_exit(void)
|
|
{
|
|
/* XXX - Implement me */
|
|
}
|
|
|
|
void
|
|
membar_producer(void)
|
|
{
|
|
/* XXX - Implement me */
|
|
}
|
|
|
|
void
|
|
membar_consumer(void)
|
|
{
|
|
/* XXX - Implement me */
|
|
}
|
|
|
|
/* Legacy kernel interfaces; they will go away (eventually). */
|
|
|
|
uint8_t
|
|
cas8(uint8_t *target, uint8_t arg1, uint8_t arg2)
|
|
{
|
|
return (atomic_cas_8(target, arg1, arg2));
|
|
}
|
|
|
|
uint32_t
|
|
cas32(uint32_t *target, uint32_t arg1, uint32_t arg2)
|
|
{
|
|
return (atomic_cas_32(target, arg1, arg2));
|
|
}
|
|
|
|
uint64_t
|
|
cas64(uint64_t *target, uint64_t arg1, uint64_t arg2)
|
|
{
|
|
return (atomic_cas_64(target, arg1, arg2));
|
|
}
|
|
|
|
ulong_t
|
|
caslong(ulong_t *target, ulong_t arg1, ulong_t arg2)
|
|
{
|
|
return (atomic_cas_ulong(target, arg1, arg2));
|
|
}
|
|
|
|
void *
|
|
casptr(void *target, void *arg1, void *arg2)
|
|
{
|
|
return (atomic_cas_ptr(target, arg1, arg2));
|
|
}
|
|
|
|
void
|
|
atomic_and_long(ulong_t *target, ulong_t bits)
|
|
{
|
|
return (atomic_and_ulong(target, bits));
|
|
}
|
|
|
|
void
|
|
atomic_or_long(ulong_t *target, ulong_t bits)
|
|
{
|
|
return (atomic_or_ulong(target, bits));
|
|
}
|