46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
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/* munlock -- undo the effects of prior mlock calls. Mach/Hurd version.
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Copyright (C) 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <hurd.h>
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#include <mach/mach_host.h>
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/* Undo the effects on these whole pages of any prior mlock calls. */
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int
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munlock (const void *addr, size_t len)
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{
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mach_port_t hostpriv;
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vm_address_t page;
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error_t err;
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err = __get_privileged_ports (&hostpriv, NULL);
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if (err)
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return __hurd_fail (EPERM);
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page = trunc_page ((vm_address_t) addr);
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len = round_page ((vm_address_t) addr + len) - page;
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err = __vm_wire (hostpriv, __mach_task_self (), page, len, VM_PROT_NONE);
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__mach_port_deallocate (__mach_task_self (), hostpriv);
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return err ? __hurd_fail (err) : 0;
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}
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