mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Brad Fitzpatrick
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
// Copyright 2022 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build arm64
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// +build arm64
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package atomicbitops
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import (
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"runtime"
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"golang.org/x/sys/cpu"
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"gvisor.dev/gvisor/pkg/cpuid"
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)
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var arm64HasATOMICS bool
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func init() {
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// The gvisor cpuid package only works on Linux.
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// For all other operating systems, use Go's x/sys/cpu package
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// to get the one bit we care about here.
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//
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// See https://github.com/google/gvisor/issues/7849.
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if runtime.GOOS == "linux" {
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arm64HasATOMICS = cpuid.HostFeatureSet().HasFeature(cpuid.ARM64FeatureATOMICS)
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} else {
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arm64HasATOMICS = cpu.ARM64.HasATOMICS
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}
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}
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