# Method System.Memory()->mmap_private()

Method mmap_private

  `int mmap(string|Stdio.File file)`
  `int mmap(string|Stdio.File file, int offset, int size)`
  `int mmap_private(string|Stdio.File file)`
  `int mmap_private(string|Stdio.File file, int offset, int size)`

Description

  `mmap` a file. This will always try to mmap the file in PROT_READ|PROT_WRITE, readable and writable, but if it fails it will try once more in PROT_READ only.