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// Copyright 2012 Google, Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree.
// Package util provides shared utilities for all gopacket examples.
package util
import (
"flag"
"log"
"os"
"runtime/pprof"
)
var cpuprofile = flag.String("cpuprofile", "", "Where to write CPU profile")
// Run starts up stuff at the beginning of a main function, and returns a
// function to defer until the function completes. It should be used like this:
//
// func main() {
// defer util.Run()()
// ... stuff ...
// }
func Run() func() {
flag.Parse()
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatalf("could not open cpu profile file %q", *cpuprofile)
}
pprof.StartCPUProfile(f)
return func() {
pprof.StopCPUProfile()
f.Close()
}
}
return func() {}
}
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