56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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* Copyright (c) 2020 YuQing <384681@qq.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the Lesser GNU General Public License, version 3
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* or later ("LGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the Lesser GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef _FC_ATOMIC_H
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#define _FC_ATOMIC_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define FC_ATOMIC_GET(var) __sync_add_and_fetch(&var, 0)
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#define FC_ATOMIC_INC(var) __sync_add_and_fetch(&var, 1)
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#define FC_ATOMIC_DEC(var) __sync_sub_and_fetch(&var, 1)
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#define FC_ATOMIC_INC_EX(var, n) __sync_add_and_fetch(&var, n)
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#define FC_ATOMIC_DEC_EX(var, n) __sync_sub_and_fetch(&var, n)
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#define FC_ATOMIC_CAS(var, old_value, new_value) \
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do { \
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if (__sync_bool_compare_and_swap(&var, old_value, new_value)) { \
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break; \
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} \
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old_value = __sync_add_and_fetch(&var, 0); \
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} while (new_value != old_value)
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#define FC_ATOMIC_SET(var, new_value) \
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do { \
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typeof(var) _old_value; \
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_old_value = var; \
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do { \
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if (__sync_bool_compare_and_swap(&var, _old_value, new_value)) { \
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break; \
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} \
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_old_value = __sync_add_and_fetch(&var, 0); \
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} while (new_value != _old_value); \
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} while (0)
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#ifdef __cplusplus
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}
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#endif
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#endif
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