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glibc  2.9
munmap.c
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00001 /* Copyright (C) 1994, 1995, 1997 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <sys/types.h>
00020 #include <sys/mman.h>
00021 #include <errno.h>
00022 #include <mach.h>
00023 
00024 /* Deallocate any mapping for the region starting at ADDR and extending LEN
00025    bytes.  Returns 0 if successful, -1 for errors (and sets errno).  */
00026 
00027 int
00028 __munmap (__ptr_t addr, size_t len)
00029 {
00030   kern_return_t err;
00031   if (err = __vm_deallocate (__mach_task_self (),
00032                           (vm_address_t) addr, (vm_size_t) len))
00033     {
00034       errno = err;
00035       return -1;
00036     }
00037   return 0;
00038 }
00039 
00040 weak_alias (__munmap, munmap)