Source file src/github.com/cilium/ebpf/internal/sys/ptr.go

Documentation: github.com/cilium/ebpf/internal/sys

     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  }
    39  

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