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
|
// +build !go1.7
package aws
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"
}
var (
backgroundCtx = new(emptyCtx)
)
|