sysdeps/mach/munmap.c

   1 /* Copyright (C) 1994-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <sys/types.h>
  19 #include <sys/mman.h>
  20 #include <errno.h>
  21 #include <mach.h>
  22
  23 /* Deallocate any mapping for the region starting at ADDR and extending LEN
  24    bytes.  Returns 0 if successful, -1 for errors (and sets errno).  */
  25
  26 int
  27 __munmap (void *addr, size_t len)
  28 {
  29   kern_return_t err;
  30
  31   if (addr == 0)
  32     {
  33       errno = EINVAL;
  34       return -1;
  35     }
  36
  37   if (err = __vm_deallocate (__mach_task_self (),
  38                              (vm_address_t) addr, (vm_size_t) len))
  39     {
  40       errno = err;
  41       return -1;
  42     }
  43   return 0;
  44 }
  45
  46 libc_hidden_def (__munmap)
  47 weak_alias (__munmap, munmap)