| | 1 | /* |
| | 2 | * Copyright (c) 2004 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 | #include <unistd.h> |
| | 24 | #include <sys/types.h> |
| | 25 | #include <sys/mman.h> |
| | 26 | #include <sys/syscall.h> |
| | 27 | |
| | 28 | /* |
| | 29 | * Stub function to account for the differences in standard compliance |
| | 30 | * while maintaining binary backward compatibility. |
| | 31 | */ |
| | 32 | int |
| | 33 | msync(void *addr, size_t len, int flags) |
| | 34 | { |
| | 35 | #if __DARWIN_UNIX03 |
| | 36 | return syscall(SYS_msync, addr, len, flags); |
| | 37 | #else /* !__DARWIN_UNIX03 */ |
| | 38 | int page_mask; |
| | 39 | size_t offset; |
| | 40 | int rv; |
| | 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 | page_mask = getpagesize() - 1; |
| | 48 | offset = ((uintptr_t) addr) & page_mask; |
| | 49 | addr = (void *) (((uintptr_t) addr) & ~page_mask); |
| | 50 | len += offset; |
| | 51 | rv = syscall(SYS_msync, addr, len, flags); |
| | 52 | return rv; |
| | 53 | #endif /* !__DARWIN_UNIX03 */ |
| | 54 | } |
projects / apple / libc.git / blame_incremental