82 lines
3.2 KiB
C
82 lines
3.2 KiB
C
/*
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* Copyright © 2018, VideoLAN and dav1d authors
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef MSCVER_STDATOMIC_H_
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#define MSCVER_STDATOMIC_H_
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#if !defined(__cplusplus) && defined(_MSC_VER)
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#pragma warning(push)
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#pragma warning(disable:4067) /* newline for __has_include_next */
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#if defined(__clang__) && __has_include_next(<stdatomic.h>)
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/* use the clang stdatomic.h with clang-cl*/
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# include_next <stdatomic.h>
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#else /* ! stdatomic.h */
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#include <windows.h>
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#include "common/attributes.h"
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typedef volatile LONG atomic_int;
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typedef volatile ULONG atomic_uint;
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typedef enum {
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memory_order_relaxed,
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memory_order_acquire
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} msvc_atomic_memory_order;
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#define atomic_init(p_a, v) do { *(p_a) = (v); } while(0)
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#define atomic_store(p_a, v) InterlockedExchange((LONG*)p_a, v)
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#define atomic_load(p_a) InterlockedCompareExchange((LONG*)p_a, 0, 0)
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#define atomic_exchange(p_a, v) InterlockedExchange(p_a, v)
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#define atomic_load_explicit(p_a, mo) atomic_load(p_a)
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static inline int atomic_compare_exchange_strong_int(LONG *obj, LONG *expected,
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LONG desired)
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{
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LONG orig = *expected;
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*expected = InterlockedCompareExchange(obj, desired, orig);
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return *expected == orig;
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}
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#define atomic_compare_exchange_strong(p_a, expected, desired) atomic_compare_exchange_strong_int((LONG *)p_a, (LONG *)expected, (LONG)desired)
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/*
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* TODO use a special call to increment/decrement
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* using InterlockedIncrement/InterlockedDecrement
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*/
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#define atomic_fetch_add(p_a, inc) InterlockedExchangeAdd(p_a, inc)
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#define atomic_fetch_sub(p_a, dec) InterlockedExchangeAdd(p_a, -(dec))
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#define atomic_fetch_or(p_a, v) InterlockedOr(p_a, v)
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#define atomic_fetch_add_explicit(p_a, inc, mo) atomic_fetch_add(p_a, inc)
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#endif /* ! stdatomic.h */
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#pragma warning(pop)
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#endif /* !defined(__cplusplus) && defined(_MSC_VER) */
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#endif /* MSCVER_STDATOMIC_H_ */
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