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++ /****************************************************************************
++ **
++ ** Copyright (C) 2019 Intel Corporation.
++ **
++ ** Permission is hereby granted, free of charge, to any person obtaining a copy
++ ** of this software and associated documentation files (the "Software"), to deal
++ ** in the Software without restriction, including without limitation the rights
++ ** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
++ ** copies of the Software, and to permit persons to whom the Software is
++ ** furnished to do so, subject to the following conditions:
++ **
++ ** The above copyright notice and this permission notice shall be included in
++ ** all copies or substantial portions of the Software.
++ **
++ ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ ** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ ** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ ** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
++ ** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
++ ** THE SOFTWARE.
++ **
++ ****************************************************************************/
++
++ #ifndef FFD_ATOMIC_C11_H
++ #define FFD_ATOMIC_C11_H
++
++ /* atomics */
++ /* Using the C11 <stdatomic.h> header or C++11's <atomic>
++ */
++
++ #if defined(__cplusplus)
++ # include <atomic>
++ # define ffd_atomic_pointer(type) std::atomic<type*>
++ # define FFD_ATOMIC_RELAXED std::memory_order_relaxed
++ # define FFD_ATOMIC_ACQUIRE std::memory_order_acquire
++ # define FFD_ATOMIC_RELEASE std::memory_order_release
++ // acq_rel & cst not necessary
++ typedef std::atomic<int> ffd_atomic_int;
++ #else
++ # include <stdatomic.h>
++ # define ffd_atomic_pointer(type) _Atomic(type*)
++ # define FFD_ATOMIC_RELAXED memory_order_relaxed
++ # define FFD_ATOMIC_ACQUIRE memory_order_acquire
++ # define FFD_ATOMIC_RELEASE memory_order_release
++ // acq_rel & cst not necessary
++
++ typedef atomic_int ffd_atomic_int;
++ #endif
++
++ #ifdef __cpp_lib_atomic_value_initialization
++ #define FFD_ATOMIC_INIT(val) { val }
++ #else
++ #define FFD_ATOMIC_INIT(val) ATOMIC_VAR_INIT(val)
++ #endif
++
++ #define ffd_atomic_load(ptr, order) \
++ atomic_load_explicit(ptr, order)
++ #define ffd_atomic_store(ptr, val, order) \
++ atomic_store_explicit(ptr, val, order)
++ #define ffd_atomic_exchange(ptr,val,order) \
++ atomic_exchange_explicit(ptr, val, order)
++ #define ffd_atomic_compare_exchange(ptr, expected, desired, order1, order2) \
++ atomic_compare_exchange_strong_explicit(ptr, expected, desired, order1, order2)
++ #define ffd_atomic_add_fetch(ptr, val, order) \
++ (atomic_fetch_add_explicit(ptr, val, order) + (val))
++
++ #endif