| /* |
| * 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> |
| |
| /* |
| * These are the void returning variants |
| */ |
| /* BEGIN CSTYLED */ |
| #define ATOMIC_INC(name, type) \ |
| void atomic_inc_##name(volatile type *target) \ |
| { \ |
| (void) __atomic_add_fetch(target, 1, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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) \ |
| { \ |
| (void) __atomic_sub_fetch(target, 1, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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) \ |
| { \ |
| (void) __atomic_add_fetch(target, bits, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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) |
| { |
| (void) __atomic_add_fetch((void **)target, bits, __ATOMIC_SEQ_CST); |
| } |
| |
| |
| #define ATOMIC_SUB(name, type1, type2) \ |
| void atomic_sub_##name(volatile type1 *target, type2 bits) \ |
| { \ |
| (void) __atomic_sub_fetch(target, bits, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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) |
| { |
| (void) __atomic_sub_fetch((void **)target, bits, __ATOMIC_SEQ_CST); |
| } |
| |
| |
| #define ATOMIC_OR(name, type) \ |
| void atomic_or_##name(volatile type *target, type bits) \ |
| { \ |
| (void) __atomic_or_fetch(target, bits, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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) \ |
| { \ |
| (void) __atomic_and_fetch(target, bits, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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) \ |
| { \ |
| return (__atomic_add_fetch(target, 1, __ATOMIC_SEQ_CST)); \ |
| } |
| |
| 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) \ |
| { \ |
| return (__atomic_sub_fetch(target, 1, __ATOMIC_SEQ_CST)); \ |
| } |
| |
| 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) \ |
| { \ |
| return (__atomic_add_fetch(target, bits, __ATOMIC_SEQ_CST)); \ |
| } |
| |
| 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) |
| { |
| return (__atomic_add_fetch((void **)target, bits, __ATOMIC_SEQ_CST)); |
| } |
| |
| |
| #define ATOMIC_SUB_NV(name, type1, type2) \ |
| type1 atomic_sub_##name##_nv(volatile type1 *target, type2 bits) \ |
| { \ |
| return (__atomic_sub_fetch(target, bits, __ATOMIC_SEQ_CST)); \ |
| } |
| |
| 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) |
| { |
| return (__atomic_sub_fetch((void **)target, bits, __ATOMIC_SEQ_CST)); |
| } |
| |
| |
| #define ATOMIC_OR_NV(name, type) \ |
| type atomic_or_##name##_nv(volatile type *target, type bits) \ |
| { \ |
| return (__atomic_or_fetch(target, bits, __ATOMIC_SEQ_CST)); \ |
| } |
| |
| 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) \ |
| { \ |
| return (__atomic_and_fetch(target, bits, __ATOMIC_SEQ_CST)); \ |
| } |
| |
| 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 *tgt == exp, set *tgt = des; return old value |
| * |
| * This may not look right on the first pass (or the sixteenth), but, |
| * from https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html: |
| * > If they are not equal, the operation is a read |
| * > and the current contents of *ptr are written into *expected. |
| * And, in the converse case, exp is already *target by definition. |
| */ |
| |
| #define ATOMIC_CAS(name, type) \ |
| type atomic_cas_##name(volatile type *target, type exp, type des) \ |
| { \ |
| __atomic_compare_exchange_n(target, &exp, des, B_FALSE, \ |
| __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \ |
| return (exp); \ |
| } |
| |
| 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 *exp, void *des) |
| { |
| |
| __atomic_compare_exchange_n((void **)target, &exp, des, B_FALSE, |
| __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); |
| return (exp); |
| } |
| |
| |
| /* |
| * Swap target and return old value |
| */ |
| |
| #define ATOMIC_SWAP(name, type) \ |
| type atomic_swap_##name(volatile type *target, type bits) \ |
| { \ |
| return (__atomic_exchange_n(target, bits, __ATOMIC_SEQ_CST)); \ |
| } |
| |
| 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) |
| { |
| return (__atomic_exchange_n((void **)target, bits, __ATOMIC_SEQ_CST)); |
| } |
| |
| #ifndef _LP64 |
| uint64_t |
| atomic_load_64(volatile uint64_t *target) |
| { |
| return (__atomic_load_n(target, __ATOMIC_RELAXED)); |
| } |
| |
| void |
| atomic_store_64(volatile uint64_t *target, uint64_t bits) |
| { |
| return (__atomic_store_n(target, bits, __ATOMIC_RELAXED)); |
| } |
| #endif |
| |
| int |
| atomic_set_long_excl(volatile ulong_t *target, uint_t value) |
| { |
| ulong_t bit = 1UL << value; |
| ulong_t old = __atomic_fetch_or(target, bit, __ATOMIC_SEQ_CST); |
| return ((old & bit) ? -1 : 0); |
| } |
| |
| int |
| atomic_clear_long_excl(volatile ulong_t *target, uint_t value) |
| { |
| ulong_t bit = 1UL << value; |
| ulong_t old = __atomic_fetch_and(target, ~bit, __ATOMIC_SEQ_CST); |
| return ((old & bit) ? 0 : -1); |
| } |
| |
| void |
| membar_enter(void) |
| { |
| __atomic_thread_fence(__ATOMIC_SEQ_CST); |
| } |
| |
| void |
| membar_exit(void) |
| { |
| __atomic_thread_fence(__ATOMIC_SEQ_CST); |
| } |
| |
| void |
| membar_producer(void) |
| { |
| __atomic_thread_fence(__ATOMIC_RELEASE); |
| } |
| |
| void |
| membar_consumer(void) |
| { |
| __atomic_thread_fence(__ATOMIC_ACQUIRE); |
| } |