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45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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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. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _H_LG_COMMON_LOCKING_
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#define _H_LG_COMMON_LOCKING_
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#include "time.h"
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#include <stdatomic.h>
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#define LG_LOCK_MODE "Atomic"
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typedef atomic_flag LG_Lock;
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#define LG_LOCK_INIT(x) atomic_flag_clear(&(x))
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#define LG_LOCK(x) \
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while(atomic_flag_test_and_set_explicit(&(x), memory_order_acquire)) { ; }
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#define LG_UNLOCK(x) \
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atomic_flag_clear_explicit(&(x), memory_order_release);
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#define LG_LOCK_FREE(x)
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#define INTERLOCKED_INC(x) atomic_fetch_add((x), 1)
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#define INTERLOCKED_DEC(x) atomic_fetch_sub((x), 1)
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#define INTERLOCKED_SECTION(lock, ...) \
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LG_LOCK(lock) \
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__VA_ARGS__ \
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LG_UNLOCK(lock)
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#endif
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