github.com/choleraehyq/pid@v0.0.18/goid.go (about)

     1  // Copyright 2016 Peter Mattis.
     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
    12  // implied. See the License for the specific language governing
    13  // permissions and limitations under the License. See the AUTHORS file
    14  // for names of contributors.
    15  
    16  package goid
    17  
    18  import (
    19  	"bytes"
    20  	"runtime"
    21  	"strconv"
    22  )
    23  
    24  func ExtractGID(s []byte) int64 {
    25  	s = s[len("goroutine "):]
    26  	s = s[:bytes.IndexByte(s, ' ')]
    27  	gid, _ := strconv.ParseInt(string(s), 10, 64)
    28  	return gid
    29  }
    30  
    31  // Parse the goid from runtime.Stack() output. Slow, but it works.
    32  func getSlow() int64 {
    33  	var buf [64]byte
    34  	return ExtractGID(buf[:runtime.Stack(buf[:], false)])
    35  }