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
7package trace
8
9import "golang.org/x/net/context"
10
11// NewContext returns a copy of the parent context
12// and associates it with a Trace.
13func 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.
18func FromContext(ctx context.Context) (tr Trace, ok bool) {
19	tr, ok = ctx.Value(contextKey).(Trace)
20	return
21}
22