ref: 58caeed2fff90b0a93fc2b8ea2708c3f50485e22
dir: /include/compat/stdatomic.h/
/* * 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_ */