| 1 | // Copyright 2019 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Package xcontext is a package to offer the extra functionality we need |
| 6 | // from contexts that is not available from the standard context package. |
| 7 | package xcontext |
| 8 | |
| 9 | import ( |
| 10 | "context" |
| 11 | "time" |
| 12 | ) |
| 13 | |
| 14 | // Detach returns a context that keeps all the values of its parent context |
| 15 | // but detaches from the cancellation and error handling. |
| 16 | func Detach(ctx context.Context) context.Context { return detachedContext{ctx} } |
| 17 | |
| 18 | type detachedContext struct{ parent context.Context } |
| 19 | |
| 20 | func (v detachedContext) Deadline() (time.Time, bool) { return time.Time{}, false } |
| 21 | func (v detachedContext) Done() <-chan struct{} { return nil } |
| 22 | func (v detachedContext) Err() error { return nil } |
| 23 | func (v detachedContext) Value(key interface{}) interface{} { return v.parent.Value(key) } |
| 24 |
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