ceph-csi/vendor/github.com/modern-go/reflect2/unsafe_eface.go
2019-01-14 20:15:09 +00:00

60 lines
1.3 KiB
Go

package reflect2
import (
"reflect"
"unsafe"
)
type eface struct {
rtype unsafe.Pointer
data unsafe.Pointer
}
func unpackEFace(obj interface{}) *eface {
return (*eface)(unsafe.Pointer(&obj))
}
func packEFace(rtype unsafe.Pointer, data unsafe.Pointer) interface{} {
var i interface{}
e := (*eface)(unsafe.Pointer(&i))
e.rtype = rtype
e.data = data
return i
}
type UnsafeEFaceType struct {
unsafeType
}
func newUnsafeEFaceType(cfg *frozenConfig, type1 reflect.Type) *UnsafeEFaceType {
return &UnsafeEFaceType{
unsafeType: *newUnsafeType(cfg, type1),
}
}
func (type2 *UnsafeEFaceType) IsNil(obj interface{}) bool {
if obj == nil {
return true
}
objEFace := unpackEFace(obj)
assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
return type2.UnsafeIsNil(objEFace.data)
}
func (type2 *UnsafeEFaceType) UnsafeIsNil(ptr unsafe.Pointer) bool {
if ptr == nil {
return true
}
return unpackEFace(*(*interface{})(ptr)).data == nil
}
func (type2 *UnsafeEFaceType) Indirect(obj interface{}) interface{} {
objEFace := unpackEFace(obj)
assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
return type2.UnsafeIndirect(objEFace.data)
}
func (type2 *UnsafeEFaceType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
return *(*interface{})(ptr)
}