/
defer.go
53 lines (45 loc) · 967 Bytes
/
defer.go
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package internal
import "sync/atomic"
type Defer struct {
recover *Recover
catch func(err interface{})
finally []func(err interface{})
}
func (d *Defer) Do(do func(f Finalizer)) {
if d != nil {
defer func(f Finalizer) {
var err interface{} = nil
if d.recover != nil {
if atomic.LoadUint32(&d.recover.done) == 0 {
atomic.StoreUint32(&d.recover.done, 1)
d.recover.err = recover()
}
err = d.recover.err
}
f.run(err)
d.catch(err)
}(Finalizer{d})
}
do(Finalizer{d})
}
type Finalizer struct {
deferService *Defer
}
func (f Finalizer) Add(actions ...func(err interface{})) {
f.deferService.finally = append(f.deferService.finally, actions...)
}
func (f Finalizer) run(err interface{}) {
for _, h := range f.deferService.finally {
h(err)
}
}
type Recover struct {
err interface{}
done uint32
}
func (s *Recover) Defer(catch func(err interface{})) *Defer {
return &Defer{
recover: s,
catch: catch,
}
}