/** Copyright © 2018, VideoLAN and dav1d authors* All rights reserved.** Redistribution and use in source and binary forms, with or without* modification, are permitted provided that the following conditions are met:** 1. Redistributions of source code must retain the above copyright notice, this*    list of conditions and the following disclaimer.** 2. Redistributions in binary form must reproduce the above copyright notice,*    this list of conditions and the following disclaimer in the documentation*    and/or other materials provided with the distribution.** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*/ #ifndef MSCVER_STDATOMIC_H_#define MSCVER_STDATOMIC_H_ #if !defined(__cplusplus) && defined(_MSC_VER) #pragma warning(push)#pragma warning(disable:4067)    /* newline for __has_include_next */ #if defined(__clang__) && __has_include_next(<stdatomic.h>)   /* use the clang stdatomic.h with clang-cl*/#  include_next <stdatomic.h>#else /* ! stdatomic.h */ #include <windows.h> #include "common/attributes.h" typedef volatile LONG  __declspec(align(32)) atomic_int;typedef volatile ULONG __declspec(align(32)) atomic_uint; typedef enum {    memory_order_relaxed,    memory_order_acquire} msvc_atomic_memory_order; #define atomic_init(p_a, v)           do { *(p_a) = (v); } while(0)#define atomic_store(p_a, v)          InterlockedExchange((LONG*)p_a, v)#define atomic_load(p_a)              InterlockedCompareExchange((LONG*)p_a, 0, 0)#define atomic_load_explicit(p_a, mo) atomic_load(p_a) /* * TODO use a special call to increment/decrement * using InterlockedIncrement/InterlockedDecrement */#define atomic_fetch_add(p_a, inc)    InterlockedExchangeAdd(p_a, inc)#define atomic_fetch_sub(p_a, dec)    InterlockedExchangeAdd(p_a, -(dec)) #endif /* ! stdatomic.h */ #pragma warning(pop) #endif /* !defined(__cplusplus) && defined(_MSC_VER) */ #endif /* MSCVER_STDATOMIC_H_ */