-
Notifications
You must be signed in to change notification settings - Fork 4
/
api.go
60 lines (45 loc) · 1.11 KB
/
api.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
// Package mutable provides v1.mutable context, that can store multiple values and be updated after creation
package mutable
import (
"context"
"sync"
)
// Context interface, provides additional Set method to change values of the context after creation
type Context interface {
context.Context
Set(key, value interface{})
Cancel()
}
type mutableContext struct {
context.Context
values map[interface{}]interface{}
cancel context.CancelFunc
mutex sync.RWMutex
}
func (mctx *mutableContext) Set(key, value interface{}) {
mctx.mutex.Lock()
mctx.values[key] = value
mctx.mutex.Unlock()
}
func (mctx *mutableContext) Value(key interface{}) (res interface{}) {
var ok bool
mctx.mutex.RLock()
res, ok = mctx.values[key]
mctx.mutex.RUnlock()
if !ok {
res = mctx.Context.Value(key)
}
return
}
func (mctx *mutableContext) Cancel() {
mctx.cancel()
}
// NewMutableContext returns new Context instance
func NewMutableContext(parent context.Context) Context {
ctx, cancel := context.WithCancel(parent)
return &mutableContext{
Context: ctx,
values: make(map[interface{}]interface{}),
cancel: cancel,
}
}