gtsocial-umbx

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ptr.go (872B)

      1 package sys
      2 
      3 import (
      4 	"unsafe"
      5 
      6 	"github.com/cilium/ebpf/internal/unix"
      7 )
      8 
      9 // NewPointer creates a 64-bit pointer from an unsafe Pointer.
     10 func NewPointer(ptr unsafe.Pointer) Pointer {
     11 	return Pointer{ptr: ptr}
     12 }
     13 
     14 // NewSlicePointer creates a 64-bit pointer from a byte slice.
     15 func NewSlicePointer(buf []byte) Pointer {
     16 	if len(buf) == 0 {
     17 		return Pointer{}
     18 	}
     19 
     20 	return Pointer{ptr: unsafe.Pointer(&buf[0])}
     21 }
     22 
     23 // NewSlicePointer creates a 64-bit pointer from a byte slice.
     24 //
     25 // Useful to assign both the pointer and the length in one go.
     26 func NewSlicePointerLen(buf []byte) (Pointer, uint32) {
     27 	return NewSlicePointer(buf), uint32(len(buf))
     28 }
     29 
     30 // NewStringPointer creates a 64-bit pointer from a string.
     31 func NewStringPointer(str string) Pointer {
     32 	p, err := unix.BytePtrFromString(str)
     33 	if err != nil {
     34 		return Pointer{}
     35 	}
     36 
     37 	return Pointer{ptr: unsafe.Pointer(p)}
     38 }