view_unsafe.go raw

   1  // Copyright 2020 The gVisor Authors.
   2  //
   3  // Licensed under the Apache License, Version 2.0 (the "License");
   4  // you may not use this file except in compliance with the License.
   5  // You may obtain a copy of the License at
   6  //
   7  //     http://www.apache.org/licenses/LICENSE-2.0
   8  //
   9  // Unless required by applicable law or agreed to in writing, software
  10  // distributed under the License is distributed on an "AS IS" BASIS,
  11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  // See the License for the specific language governing permissions and
  13  // limitations under the License.
  14  
  15  package buffer
  16  
  17  import (
  18  	"reflect"
  19  	"unsafe"
  20  )
  21  
  22  // BasePtr returns a pointer to the view's chunk.
  23  func (v *View) BasePtr() *byte {
  24  	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&v.chunk.data))
  25  	return (*byte)(unsafe.Pointer(hdr.Data))
  26  }
  27