mirror of git://gcc.gnu.org/git/gcc.git
36 lines
896 B
Go
36 lines
896 B
Go
// Copyright 2014 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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// +build ignore
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package context_test
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import (
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"context"
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"fmt"
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"time"
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)
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func ExampleWithTimeout() {
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// Pass a context with a timeout to tell a blocking function that it
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// should abandon its work after the timeout elapses.
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ctx, cancel := context.WithTimeout(context.Background(), 50*time.Millisecond)
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select {
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case <-time.After(1 * time.Second):
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fmt.Println("overslept")
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case <-ctx.Done():
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fmt.Println(ctx.Err()) // prints "context deadline exceeded"
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}
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// Even though ctx should have expired already, it is good
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// practice to call its cancelation function in any case.
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// Failure to do so may keep the context and its parent alive
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// longer than necessary.
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cancel()
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// Output:
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// context deadline exceeded
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}
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