Created
December 10, 2013 06:31
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package pointerTagging | |
import ( | |
"unsafe" | |
"math/rand" | |
"time" | |
) | |
type vector struct { | |
x int | |
y int | |
} | |
var interfaceSlice []interface{} | |
var uintSlice []uint | |
var tmpInterfaceSlice []interface{} | |
var tmpUintSlice []uint | |
var InterfaceCollectionBox []interface{} | |
var TaggingCollectionBox []interface{} | |
func init() { | |
rand.Seed(time.Now().UnixNano()) | |
initializingConventional() | |
tmpInterfaceSlice = interfaceSlice | |
initializingTagging() | |
tmpUintSlice = uintSlice | |
} | |
func TagPointer(ptr *uint, i uint) { | |
x := (*ptr | i) | |
*ptr = x | |
} | |
func ReturnPointer(ptr *uint) uint { | |
tag := *ptr & uint(7) | |
*ptr = (*ptr & ^uint(7)) | |
return tag | |
} | |
func initializingConventional() { | |
interfaceSlice = make([]interface{}, 0) | |
for i := 0; i < 1000; i++ { | |
random := rand.Intn(5) | |
switch random { | |
case 0: | |
a := "Hello World" | |
interfaceSlice = append(interfaceSlice, &a) | |
case 1: | |
a := 65535 | |
interfaceSlice = append(interfaceSlice, &a) | |
case 2: | |
a := 3.14159 | |
interfaceSlice = append(interfaceSlice, &a) | |
case 3: | |
a := &vector{1,2} | |
interfaceSlice = append(interfaceSlice, a) | |
case 4: | |
a := uint(65535) | |
interfaceSlice = append(interfaceSlice, &a) | |
} | |
} | |
} | |
func initializingTagging() { | |
uintSlice = make([]uint, 0) | |
for i := 0; i < 1000; i++ { | |
random := rand.Intn(5) | |
switch random { | |
case 0: | |
a := "Hello World" | |
u := uint(uintptr(unsafe.Pointer(&a))) | |
TagPointer(&u, uint(1)) | |
uintSlice = append(uintSlice, u) | |
case 1: | |
a := 65535 | |
u := uint(uintptr(unsafe.Pointer(&a))) | |
TagPointer(&u, uint(2)) | |
uintSlice = append(uintSlice, u) | |
case 2: | |
a := 3.14159 | |
u := uint(uintptr(unsafe.Pointer(&a))) | |
TagPointer(&u, uint(3)) | |
uintSlice = append(uintSlice, u) | |
case 3: | |
a := &vector{1,2} | |
u := uint(uintptr(unsafe.Pointer(a))) | |
TagPointer(&u, uint(4)) | |
uintSlice = append(uintSlice, u) | |
case 4: | |
a := uint(65535) | |
u := uint(uintptr(unsafe.Pointer(&a))) | |
TagPointer(&u, uint(5)) | |
uintSlice = append(uintSlice, u) | |
} | |
} | |
} | |
func RetrievingTagging() { | |
TaggingCollectionBox = make([]interface{}, 0) | |
for _, v := range tmpUintSlice { | |
t := ReturnPointer(&v) | |
switch t { | |
case 1: | |
TaggingCollectionBox = append(TaggingCollectionBox, *(*string)(unsafe.Pointer(uintptr(v)))) | |
case 2: | |
TaggingCollectionBox = append(TaggingCollectionBox, *(*int)(unsafe.Pointer(uintptr(v)))) | |
case 3: | |
TaggingCollectionBox = append(TaggingCollectionBox, *(*float64)(unsafe.Pointer(uintptr(v)))) | |
case 4: | |
TaggingCollectionBox = append(TaggingCollectionBox, (*vector)(unsafe.Pointer(uintptr(v)))) | |
case 5: | |
TaggingCollectionBox = append(TaggingCollectionBox, *(*uint)(unsafe.Pointer(uintptr(v)))) | |
} | |
} | |
} | |
func InterfaceRetrieval() { | |
InterfaceCollectionBox = make([]interface{}, 0) | |
for _, v := range tmpInterfaceSlice { | |
switch t := v.(type) { | |
case *string: | |
InterfaceCollectionBox = append(InterfaceCollectionBox, *t) | |
case *int: | |
InterfaceCollectionBox = append(InterfaceCollectionBox, *t) | |
case *float64: | |
InterfaceCollectionBox = append(InterfaceCollectionBox, *t) | |
case *vector: | |
InterfaceCollectionBox = append(InterfaceCollectionBox, t) | |
case *uint: | |
InterfaceCollectionBox = append(InterfaceCollectionBox, *t) | |
} | |
} | |
} |
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