diff options
author | uzhas <uzhas@ydb.tech> | 2023-11-16 16:04:50 +0300 |
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committer | uzhas <uzhas@ydb.tech> | 2023-11-16 17:46:46 +0300 |
commit | 46f0c0079bb50609d2eeb6586642bcf114fc5239 (patch) | |
tree | 84e4e4978d57fe5de321ba69bf9d0c290de60a66 /vendor/golang.org/x/sys/cpu/proc_cpuinfo_linux.go | |
parent | 73045e389397816cc2bdd6cd7818b4bce427b265 (diff) | |
download | ydb-46f0c0079bb50609d2eeb6586642bcf114fc5239.tar.gz |
enable ya make for go projects
Diffstat (limited to 'vendor/golang.org/x/sys/cpu/proc_cpuinfo_linux.go')
-rw-r--r-- | vendor/golang.org/x/sys/cpu/proc_cpuinfo_linux.go | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/cpu/proc_cpuinfo_linux.go b/vendor/golang.org/x/sys/cpu/proc_cpuinfo_linux.go new file mode 100644 index 0000000000..d87bd6b3eb --- /dev/null +++ b/vendor/golang.org/x/sys/cpu/proc_cpuinfo_linux.go @@ -0,0 +1,54 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build linux && arm64 +// +build linux,arm64 + +package cpu + +import ( + "errors" + "io" + "os" + "strings" +) + +func readLinuxProcCPUInfo() error { + f, err := os.Open("/proc/cpuinfo") + if err != nil { + return err + } + defer f.Close() + + var buf [1 << 10]byte // enough for first CPU + n, err := io.ReadFull(f, buf[:]) + if err != nil && err != io.ErrUnexpectedEOF { + return err + } + in := string(buf[:n]) + const features = "\nFeatures : " + i := strings.Index(in, features) + if i == -1 { + return errors.New("no CPU features found") + } + in = in[i+len(features):] + if i := strings.Index(in, "\n"); i != -1 { + in = in[:i] + } + m := map[string]*bool{} + + initOptions() // need it early here; it's harmless to call twice + for _, o := range options { + m[o.Name] = o.Feature + } + // The EVTSTRM field has alias "evstrm" in Go, but Linux calls it "evtstrm". + m["evtstrm"] = &ARM64.HasEVTSTRM + + for _, f := range strings.Fields(in) { + if p, ok := m[f]; ok { + *p = true + } + } + return nil +} |