libsyscall/wrappers/legacy/msync.c

   1 /*
   2  * Copyright (c) 2004, 2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #ifndef NO_SYSCALL_LEGACY
  24
  25 #define _NONSTD_SOURCE
  26 #include <sys/cdefs.h>
  27
  28 #include <sys/types.h>
  29 #include <sys/mman.h>
  30 #include <mach/vm_param.h>
  31
  32 int __msync_nocancel(void *, size_t, int);
  33
  34 /*
  35  * Stub function for legacy version
  36  */
  37 int
  38 msync(void *addr, size_t len, int flags)
  39 {
  40         size_t  offset;
  41
  42         /*
  43          * Page-align "addr" since the system now requires it
  44          * for standards compliance.
  45          * Update "len" to reflect the alignment.
  46          */
  47         offset = ((uintptr_t) addr) & PAGE_MASK;
  48         addr = (void *) (((uintptr_t) addr) & ~PAGE_MASK);
  49         len += offset;
  50         return __msync_nocancel(addr, len, flags);
  51 }
  52
  53 #endif /* NO_SYSCALL_LEGACY */