122337569c
Added abstractions for storing and loading 32-bit and 64-bit values atomically. The functions currently use the GCC __atomic builtin atomics.
64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include <maxscale/atomic.h>
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/**
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* @file atomic.c - Implementation of atomic operations for MaxScale
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*/
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int atomic_add(int *variable, int value)
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{
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return __sync_fetch_and_add(variable, value);
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}
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int64_t atomic_add_int64(int64_t *variable, int64_t value)
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{
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return __sync_fetch_and_add(variable, value);
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}
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uint64_t atomic_add_uint64(uint64_t *variable, int64_t value)
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{
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return __sync_fetch_and_add(variable, value);
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}
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int atomic_read(int *variable)
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{
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return __atomic_load_n(variable, __ATOMIC_SEQ_CST);
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}
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int64_t atomic_read_int64(int64_t *variable)
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{
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return __atomic_load_n(variable, __ATOMIC_SEQ_CST);
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}
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uint64_t atomic_read_uint64(uint64_t *variable)
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{
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return __atomic_load_n(variable, __ATOMIC_SEQ_CST);
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}
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void atomic_write(int *variable, int value)
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{
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return __atomic_store_n(variable, value, __ATOMIC_SEQ_CST);
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}
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void atomic_write_int64(int64_t *variable, int64_t value)
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{
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return __atomic_store_n(variable, value, __ATOMIC_SEQ_CST);
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}
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void atomic_write_uint64(uint64_t *variable, uint64_t value)
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{
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return __atomic_store_n(variable, value, __ATOMIC_SEQ_CST);
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}
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