42 lines
874 B
Go
42 lines
874 B
Go
//go:build !go1.7
|
|
// +build !go1.7
|
|
|
|
package context
|
|
|
|
import "time"
|
|
|
|
// An emptyCtx is a copy of the Go 1.7 context.emptyCtx type. This is copied to
|
|
// provide a 1.6 and 1.5 safe version of context that is compatible with Go
|
|
// 1.7's Context.
|
|
//
|
|
// An emptyCtx is never canceled, has no values, and has no deadline. It is not
|
|
// struct{}, since vars of this type must have distinct addresses.
|
|
type emptyCtx int
|
|
|
|
func (*emptyCtx) Deadline() (deadline time.Time, ok bool) {
|
|
return
|
|
}
|
|
|
|
func (*emptyCtx) Done() <-chan struct{} {
|
|
return nil
|
|
}
|
|
|
|
func (*emptyCtx) Err() error {
|
|
return nil
|
|
}
|
|
|
|
func (*emptyCtx) Value(key interface{}) interface{} {
|
|
return nil
|
|
}
|
|
|
|
func (e *emptyCtx) String() string {
|
|
switch e {
|
|
case BackgroundCtx:
|
|
return "aws.BackgroundContext"
|
|
}
|
|
return "unknown empty Context"
|
|
}
|
|
|
|
// BackgroundCtx is the common base context.
|
|
var BackgroundCtx = new(emptyCtx)
|