ptrutil

package

v0.1.5 Latest Latest Go to latest Published: Jun 21, 2020 License: MIT Imports: 3 Imported by: 0

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Valid go.mod file
Redistributable license
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Repository

github.com/protolambda/zssz

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Documentation ¶

Index ¶

func AllocateSliceSpaceAndBind(p unsafe.Pointer, length uint64, typ reflect.Type) unsafe.Pointer
func AllocateSpace(p unsafe.Pointer, typ reflect.Type) unsafe.Pointer
func BytesAllocFn(p unsafe.Pointer, length uint64) unsafe.Pointer
func IfacePtrToPtr(val *interface{}) unsafe.Pointer
type AllocationFn
type SliceAllocationFn
- func MakeSliceAllocFn(typ reflect.Type) SliceAllocationFn
- func (f SliceAllocationFn) MutateLenOrAllocNew(p unsafe.Pointer, length uint64) unsafe.Pointer
type SliceHeader
- func GetSliceHeader(p unsafe.Pointer, length uint64) *SliceHeader
- func ReadSliceHeader(p unsafe.Pointer) *SliceHeader

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func AllocateSliceSpaceAndBind ¶

func AllocateSliceSpaceAndBind(p unsafe.Pointer, length uint64, typ reflect.Type) unsafe.Pointer

Allocates a new slice of the given length, of the given type. Note: p is assumed to be a pointer to a slice header, and the pointer is assumed to keep the referenced data alive as long as necessary, away from the GC. The allocated space is zeroed out.

func AllocateSpace ¶

func AllocateSpace(p unsafe.Pointer, typ reflect.Type) unsafe.Pointer

Allocates space of the given length and returns a pointer to the contents The allocated space is zeroed out.

func BytesAllocFn ¶

func BytesAllocFn(p unsafe.Pointer, length uint64) unsafe.Pointer

func IfacePtrToPtr ¶

func IfacePtrToPtr(val *interface{}) unsafe.Pointer

Types ¶

type AllocationFn ¶

type AllocationFn func(p unsafe.Pointer) unsafe.Pointer

type SliceAllocationFn ¶

type SliceAllocationFn func(p unsafe.Pointer, length uint64) unsafe.Pointer

func MakeSliceAllocFn ¶

func MakeSliceAllocFn(typ reflect.Type) SliceAllocationFn

func (SliceAllocationFn) MutateLenOrAllocNew ¶ added in v0.1.5

func (f SliceAllocationFn) MutateLenOrAllocNew(p unsafe.Pointer, length uint64) unsafe.Pointer

Checks the capacity of the slice first. If sufficient, it mutates the length and returns the pointer to the contents. If not sufficient, it allocates a new slice using the underlying allocation function, and returns the pointer to the new contents.

type SliceHeader ¶

type SliceHeader struct {
	Data unsafe.Pointer
	Len  int
	Cap  int
}

func GetSliceHeader ¶

func GetSliceHeader(p unsafe.Pointer, length uint64) *SliceHeader

func ReadSliceHeader ¶

func ReadSliceHeader(p unsafe.Pointer) *SliceHeader

Source Files ¶

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