gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/sentry/platform/systrap/sysmsg/atomic.h (about)

     1  // Copyright 2023 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #ifndef THIRD_PARTY_GVISOR_PKG_SENTRY_PLATFORM_SYSTRAP_SYSMSG_ATOMIC_H_
    16  #define THIRD_PARTY_GVISOR_PKG_SENTRY_PLATFORM_SYSTRAP_SYSMSG_ATOMIC_H_
    17  
    18  #define atomic_load(p) __atomic_load_n(p, __ATOMIC_ACQUIRE)
    19  #define atomic_store(p, val) __atomic_store_n(p, val, __ATOMIC_RELEASE)
    20  #define atomic_compare_exchange(p, old, val)                        \
    21    __atomic_compare_exchange_n(p, old, val, false, __ATOMIC_ACQ_REL, \
    22                                __ATOMIC_ACQUIRE)
    23  #define atomic_add(p, val) __atomic_add_fetch(p, val, __ATOMIC_ACQ_REL)
    24  #define atomic_sub(p, val) __atomic_sub_fetch(p, val, __ATOMIC_ACQ_REL)
    25  
    26  #endif  // THIRD_PARTY_GVISOR_PKG_SENTRY_PLATFORM_SYSTRAP_SYSMSG_ATOMIC_H_