| Matthias Andreas Benkard | 832a54e | 2019-01-29 09:27:38 +0100 | [diff] [blame] | 1 | // Copyright 2017 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 | // +build go1.7 |
| 6 | |
| 7 | package trace |
| 8 | |
| 9 | import "context" |
| 10 | |
| 11 | // NewContext returns a copy of the parent context |
| 12 | // and associates it with a Trace. |
| 13 | func NewContext(ctx context.Context, tr Trace) context.Context { |
| 14 | return context.WithValue(ctx, contextKey, tr) |
| 15 | } |
| 16 | |
| 17 | // FromContext returns the Trace bound to the context, if any. |
| 18 | func FromContext(ctx context.Context) (tr Trace, ok bool) { |
| 19 | tr, ok = ctx.Value(contextKey).(Trace) |
| 20 | return |
| 21 | } |