mirror of
https://github.com/prometheus/prometheus
synced 2024-12-28 09:42:22 +00:00
35 lines
1.1 KiB
Go
35 lines
1.1 KiB
Go
// Copyright 2015 Peter Mattis.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
// implied. See the License for the specific language governing
|
|
// permissions and limitations under the License. See the AUTHORS file
|
|
// for names of contributors.
|
|
|
|
// +build go1.4,!go1.5
|
|
|
|
package goid
|
|
|
|
import "unsafe"
|
|
|
|
var pointerSize = unsafe.Sizeof(uintptr(0))
|
|
|
|
// Backdoor access to runtime·getg().
|
|
func getg() uintptr // in goid_go1.4.s
|
|
|
|
// Get returns the id of the current goroutine.
|
|
func Get() int64 {
|
|
// The goid is the 16th field in the G struct where each field is a
|
|
// pointer, uintptr or padded to that size. See runtime.h from the
|
|
// Go sources. I'm not aware of a cleaner way to determine the
|
|
// offset.
|
|
return *(*int64)(unsafe.Pointer(getg() + 16*pointerSize))
|
|
}
|