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- // Copyright 2017 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
-
- // +build !go1.7
-
- package trace
-
- import "golang.org/x/net/context"
-
- // NewContext returns a copy of the parent context
- // and associates it with a Trace.
- func NewContext(ctx context.Context, tr Trace) context.Context {
- return context.WithValue(ctx, contextKey, tr)
- }
-
- // FromContext returns the Trace bound to the context, if any.
- func FromContext(ctx context.Context) (tr Trace, ok bool) {
- tr, ok = ctx.Value(contextKey).(Trace)
- return
- }
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