Kenny Root | e2fa7dc | 2010-11-24 12:56:06 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef __LIB_UTILS_COMPAT_H |
| 18 | #define __LIB_UTILS_COMPAT_H |
| 19 | |
| 20 | #include <unistd.h> |
| 21 | |
| 22 | /* Compatibility definitions for non-Linux (i.e., BSD-based) hosts. */ |
| 23 | #ifndef HAVE_OFF64_T |
| 24 | #if _FILE_OFFSET_BITS < 64 |
| 25 | #error "_FILE_OFFSET_BITS < 64; large files are not supported on this platform" |
| 26 | #endif /* _FILE_OFFSET_BITS < 64 */ |
| 27 | |
| 28 | typedef off_t off64_t; |
| 29 | |
| 30 | static inline off64_t lseek64(int fd, off64_t offset, int whence) { |
| 31 | return lseek(fd, offset, whence); |
| 32 | } |
| 33 | |
| 34 | #ifdef HAVE_PREAD |
| 35 | static inline ssize_t pread64(int fd, void* buf, size_t nbytes, off64_t offset) { |
| 36 | return pread(fd, buf, nbytes, offset); |
| 37 | } |
| 38 | #endif |
| 39 | |
| 40 | #endif /* !HAVE_OFF64_T */ |
| 41 | |
Kenny Root | b9fd6f9 | 2012-10-16 11:34:02 -0700 | [diff] [blame] | 42 | #if HAVE_PRINTF_ZD |
| 43 | # define ZD "%zd" |
| 44 | # define ZD_TYPE ssize_t |
| 45 | #else |
| 46 | # define ZD "%ld" |
| 47 | # define ZD_TYPE long |
| 48 | #endif |
| 49 | |
| 50 | /* |
| 51 | * TEMP_FAILURE_RETRY is defined by some, but not all, versions of |
| 52 | * <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's |
| 53 | * not already defined, then define it here. |
| 54 | */ |
| 55 | #ifndef TEMP_FAILURE_RETRY |
| 56 | /* Used to retry syscalls that can return EINTR. */ |
| 57 | #define TEMP_FAILURE_RETRY(exp) ({ \ |
| 58 | typeof (exp) _rc; \ |
| 59 | do { \ |
| 60 | _rc = (exp); \ |
| 61 | } while (_rc == -1 && errno == EINTR); \ |
| 62 | _rc; }) |
| 63 | #endif |
| 64 | |
Kenny Root | e2fa7dc | 2010-11-24 12:56:06 -0800 | [diff] [blame] | 65 | #endif /* __LIB_UTILS_COMPAT_H */ |