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gid.go
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gid.go
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// Copyright 2017-2019 Lei Ni (nilei81@gmail.com)
//
// 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.
package lang
import (
"bytes"
"runtime"
"strconv"
)
// copied from
// https://blog.sgmansfield.com/2015/12/goroutine-ids/
// this function is only used for debugging, it should be strictly prohibited
// from any production code.
// GetGIDForDebugOnly is a for debugging only function that returns the
// goroutine id of the calling goroutine. It is strictly prohibited to use
// this function anywhere in any production code.
func GetGIDForDebugOnly() uint64 {
b := make([]byte, 64)
b = b[:runtime.Stack(b, false)]
b = bytes.TrimPrefix(b, []byte("goroutine "))
b = b[:bytes.IndexByte(b, ' ')]
n, err := strconv.ParseUint(string(b), 10, 64)
if err != nil {
panic(err)
}
return n
}