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a26baf285f
All changes needed for the libspl layer. This includes modifications to files directly copied from OpenSolaris and the addition of new files needed to fill in the gaps. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
425 lines
10 KiB
C
425 lines
10 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2009 by Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <atomic.h>
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#include <assert.h>
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#include <pthread.h>
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/*
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* All operations are implemented by serializing them through a global
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* pthread mutex. This provides a correct generic implementation.
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* However all supported architectures are encouraged to provide a
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* native implementation is assembly for performance reasons.
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*/
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pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER;
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/*
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* Theses are the void returning variants
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*/
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#define ATOMIC_INC(name, type) \
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void atomic_inc_##name(volatile type *target) \
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{ \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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(*target)++; \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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}
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ATOMIC_INC(long, unsigned long)
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ATOMIC_INC(8, uint8_t)
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ATOMIC_INC(uchar, uchar_t)
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ATOMIC_INC(16, uint16_t)
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ATOMIC_INC(ushort, ushort_t)
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ATOMIC_INC(32, uint32_t)
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ATOMIC_INC(uint, uint_t)
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ATOMIC_INC(ulong, ulong_t)
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ATOMIC_INC(64, uint64_t)
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#define ATOMIC_DEC(name, type) \
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void atomic_dec_##name(volatile type *target) \
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{ \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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(*target)--; \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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}
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ATOMIC_DEC(long, unsigned long)
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ATOMIC_DEC(8, uint8_t)
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ATOMIC_DEC(uchar, uchar_t)
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ATOMIC_DEC(16, uint16_t)
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ATOMIC_DEC(ushort, ushort_t)
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ATOMIC_DEC(32, uint32_t)
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ATOMIC_DEC(uint, uint_t)
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ATOMIC_DEC(ulong, ulong_t)
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ATOMIC_DEC(64, uint64_t)
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#define ATOMIC_ADD(name, type1, type2) \
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void atomic_add_##name(volatile type1 *target, type2 bits) \
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{ \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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*target += bits; \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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}
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ATOMIC_ADD(8, uint8_t, int8_t)
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ATOMIC_ADD(char, uchar_t, signed char)
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ATOMIC_ADD(16, uint16_t, int16_t)
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ATOMIC_ADD(short, ushort_t, short)
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ATOMIC_ADD(32, uint32_t, int32_t)
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ATOMIC_ADD(int, uint_t, int)
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ATOMIC_ADD(long, ulong_t, long)
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ATOMIC_ADD(64, uint64_t, int64_t)
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void atomic_add_ptr(volatile void *target, ssize_t bits)
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{
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
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*(caddr_t *)target += bits;
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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}
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#define ATOMIC_OR(name, type) \
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void atomic_or_##name(volatile type *target, type bits) \
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{ \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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*target |= bits; \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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}
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ATOMIC_OR(8, uint8_t)
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ATOMIC_OR(uchar, uchar_t)
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ATOMIC_OR(16, uint16_t)
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ATOMIC_OR(ushort, ushort_t)
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ATOMIC_OR(32, uint32_t)
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ATOMIC_OR(uint, uint_t)
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ATOMIC_OR(ulong, ulong_t)
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ATOMIC_OR(64, uint64_t)
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#define ATOMIC_AND(name, type) \
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void atomic_and_##name(volatile type *target, type bits) \
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{ \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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*target &= bits; \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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}
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ATOMIC_AND(8, uint8_t)
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ATOMIC_AND(uchar, uchar_t)
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ATOMIC_AND(16, uint16_t)
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ATOMIC_AND(ushort, ushort_t)
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ATOMIC_AND(32, uint32_t)
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ATOMIC_AND(uint, uint_t)
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ATOMIC_AND(ulong, ulong_t)
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ATOMIC_AND(64, uint64_t)
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/*
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* New value returning variants
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*/
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#define ATOMIC_INC_NV(name, type) \
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type atomic_inc_##name##_nv(volatile type *target) \
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{ \
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type rc; \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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rc = (++(*target)); \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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return rc; \
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}
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ATOMIC_INC_NV(long, unsigned long)
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ATOMIC_INC_NV(8, uint8_t)
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ATOMIC_INC_NV(uchar, uchar_t)
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ATOMIC_INC_NV(16, uint16_t)
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ATOMIC_INC_NV(ushort, ushort_t)
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ATOMIC_INC_NV(32, uint32_t)
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ATOMIC_INC_NV(uint, uint_t)
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ATOMIC_INC_NV(ulong, ulong_t)
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ATOMIC_INC_NV(64, uint64_t)
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#define ATOMIC_DEC_NV(name, type) \
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type atomic_dec_##name##_nv(volatile type *target) \
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{ \
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type rc; \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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rc = (--(*target)); \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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return rc; \
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}
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ATOMIC_DEC_NV(long, unsigned long)
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ATOMIC_DEC_NV(8, uint8_t)
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ATOMIC_DEC_NV(uchar, uchar_t)
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ATOMIC_DEC_NV(16, uint16_t)
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ATOMIC_DEC_NV(ushort, ushort_t)
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ATOMIC_DEC_NV(32, uint32_t)
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ATOMIC_DEC_NV(uint, uint_t)
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ATOMIC_DEC_NV(ulong, ulong_t)
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ATOMIC_DEC_NV(64, uint64_t)
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#define ATOMIC_ADD_NV(name, type1, type2) \
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type1 atomic_add_##name##_nv(volatile type1 *target, type2 bits)\
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{ \
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type1 rc; \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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rc = (*target += bits); \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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return rc; \
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}
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ATOMIC_ADD_NV(8, uint8_t, int8_t)
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ATOMIC_ADD_NV(char, uchar_t, signed char)
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ATOMIC_ADD_NV(16, uint16_t, int16_t)
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ATOMIC_ADD_NV(short, ushort_t, short)
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ATOMIC_ADD_NV(32, uint32_t, int32_t)
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ATOMIC_ADD_NV(int, uint_t, int)
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ATOMIC_ADD_NV(long, ulong_t, long)
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ATOMIC_ADD_NV(64, uint64_t, int64_t)
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void *atomic_add_ptr_nv(volatile void *target, ssize_t bits)
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{
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void *ptr;
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
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ptr = (*(caddr_t *)target += bits);
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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return ptr;
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}
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#define ATOMIC_OR_NV(name, type) \
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type atomic_or_##name##_nv(volatile type *target, type bits) \
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{ \
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type rc; \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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rc = (*target |= bits); \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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return rc; \
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}
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ATOMIC_OR_NV(long, unsigned long)
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ATOMIC_OR_NV(8, uint8_t)
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ATOMIC_OR_NV(uchar, uchar_t)
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ATOMIC_OR_NV(16, uint16_t)
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ATOMIC_OR_NV(ushort, ushort_t)
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ATOMIC_OR_NV(32, uint32_t)
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ATOMIC_OR_NV(uint, uint_t)
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ATOMIC_OR_NV(ulong, ulong_t)
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ATOMIC_OR_NV(64, uint64_t)
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#define ATOMIC_AND_NV(name, type) \
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type atomic_and_##name##_nv(volatile type *target, type bits) \
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{ \
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type rc; \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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rc = (*target &= bits); \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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return rc; \
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}
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ATOMIC_AND_NV(long, unsigned long)
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ATOMIC_AND_NV(8, uint8_t)
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ATOMIC_AND_NV(uchar, uchar_t)
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ATOMIC_AND_NV(16, uint16_t)
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ATOMIC_AND_NV(ushort, ushort_t)
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ATOMIC_AND_NV(32, uint32_t)
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ATOMIC_AND_NV(uint, uint_t)
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ATOMIC_AND_NV(ulong, ulong_t)
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ATOMIC_AND_NV(64, uint64_t)
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/*
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* If *arg1 == arg2, set *arg1 = arg3; return old value
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*/
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#define ATOMIC_CAS(name, type) \
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type atomic_cas_##name(volatile type *target, type arg1, type arg2) \
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{ \
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type old; \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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old = *target; \
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if (old == arg1) \
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*target = arg2; \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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return old; \
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}
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ATOMIC_CAS(8, uint8_t)
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ATOMIC_CAS(uchar, uchar_t)
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ATOMIC_CAS(16, uint16_t)
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ATOMIC_CAS(ushort, ushort_t)
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ATOMIC_CAS(32, uint32_t)
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ATOMIC_CAS(uint, uint_t)
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ATOMIC_CAS(ulong, ulong_t)
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ATOMIC_CAS(64, uint64_t)
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void *atomic_cas_ptr(volatile void *target, void *arg1, void *arg2)
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{
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void *old;
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
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old = *(void **)target;
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if (old == arg1)
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*(void **)target = arg2;
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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return old;
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}
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/*
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* Swap target and return old value
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*/
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#define ATOMIC_SWAP(name, type) \
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type atomic_swap_##name(volatile type *target, type bits) \
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{ \
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type old; \
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \
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old = *target; \
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*target = bits; \
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \
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return old; \
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}
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ATOMIC_SWAP(8, uint8_t)
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ATOMIC_SWAP(uchar, uchar_t)
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ATOMIC_SWAP(16, uint16_t)
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ATOMIC_SWAP(ushort, ushort_t)
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ATOMIC_SWAP(32, uint32_t)
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ATOMIC_SWAP(uint, uint_t)
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ATOMIC_SWAP(ulong, ulong_t)
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ATOMIC_SWAP(64, uint64_t)
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void *atomic_swap_ptr(volatile void *target, void *bits)
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{
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void *old;
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
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old = *(void **)target;
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*(void **)target = bits;
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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return old;
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}
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int atomic_set_long_excl(volatile ulong_t *target, uint_t value)
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{
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ulong_t bit;
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
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bit = (1UL << value);
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if ((*target & bit) != 0) {
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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return -1;
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}
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*target |= bit;
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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return 0;
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}
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int atomic_clear_long_excl(volatile ulong_t *target, uint_t value)
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{
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ulong_t bit;
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VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0);
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bit = (1UL << value);
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if ((*target & bit) != 0) {
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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return -1;
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}
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*target &= ~bit;
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VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0);
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return 0;
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}
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void membar_enter(void)
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{
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/* XXX - Implement me */
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}
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void membar_exit(void)
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{
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/* XXX - Implement me */
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}
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void membar_producer(void)
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{
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/* XXX - Implement me */
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}
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void membar_consumer(void)
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{
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/* XXX - Implement me */
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}
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/* Legacy kernel interfaces; they will go away (eventually). */
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uint8_t cas8(uint8_t *target, uint8_t arg1, uint8_t arg2)
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{
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return atomic_cas_8(target, arg1, arg2);
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}
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uint32_t cas32(uint32_t *target, uint32_t arg1, uint32_t arg2)
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{
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return atomic_cas_32(target, arg1, arg2);
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}
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uint64_t cas64(uint64_t *target, uint64_t arg1, uint64_t arg2)
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{
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return atomic_cas_64(target, arg1, arg2);
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}
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ulong_t caslong(ulong_t *target, ulong_t arg1, ulong_t arg2)
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{
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return atomic_cas_ulong(target, arg1, arg2);
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}
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void *casptr(void *target, void *arg1, void *arg2)
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{
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return atomic_cas_ptr(target, arg1, arg2);
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}
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void atomic_and_long(ulong_t *target, ulong_t bits)
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{
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return atomic_and_ulong(target, bits);
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}
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void atomic_or_long(ulong_t *target, ulong_t bits)
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{
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return atomic_or_ulong(target, bits);
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}
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