8dc2499aa6
gotools/ * Makefile.am (go_cmd_cgo_files): Add ast_go118.go (check-go-tool): Copy golang.org/x/tools directories. * Makefile.in: Regenerate. Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/384695
47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
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package signal_test
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import (
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"context"
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"fmt"
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"log"
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"os"
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"os/signal"
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"time"
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)
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// This example passes a context with a signal to tell a blocking function that
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// it should abandon its work after a signal is received.
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func ExampleNotifyContext() {
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ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
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defer stop()
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p, err := os.FindProcess(os.Getpid())
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if err != nil {
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log.Fatal(err)
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}
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// On a Unix-like system, pressing Ctrl+C on a keyboard sends a
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// SIGINT signal to the process of the program in execution.
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//
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// This example simulates that by sending a SIGINT signal to itself.
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if err := p.Signal(os.Interrupt); err != nil {
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log.Fatal(err)
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}
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select {
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case <-time.After(time.Second):
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fmt.Println("missed signal")
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case <-ctx.Done():
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fmt.Println(ctx.Err()) // prints "context canceled"
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stop() // stop receiving signal notifications as soon as possible.
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}
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// Output:
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// context canceled
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}
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