| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef __LIB_UTILS_COMPAT_H |
| #define __LIB_UTILS_COMPAT_H |
| |
| #include <unistd.h> |
| |
| #if defined(__APPLE__) |
| |
| /* Mac OS has always had a 64-bit off_t, so it doesn't have off64_t. */ |
| |
| typedef off_t off64_t; |
| |
| static inline off64_t lseek64(int fd, off64_t offset, int whence) { |
| return lseek(fd, offset, whence); |
| } |
| |
| static inline ssize_t pread64(int fd, void* buf, size_t nbytes, off64_t offset) { |
| return pread(fd, buf, nbytes, offset); |
| } |
| |
| #endif /* __APPLE__ */ |
| |
| #if defined(_WIN32) |
| #define O_CLOEXEC 0 |
| #define O_NOFOLLOW 0 |
| #define DEFFILEMODE 0666 |
| #endif /* _WIN32 */ |
| |
| #if HAVE_PRINTF_ZD |
| # define ZD "%zd" |
| # define ZD_TYPE ssize_t |
| #else |
| # define ZD "%ld" |
| # define ZD_TYPE long |
| #endif |
| |
| /* |
| * Needed for cases where something should be constexpr if possible, but not |
| * being constexpr is fine if in pre-C++11 code (such as a const static float |
| * member variable). |
| */ |
| #if __cplusplus >= 201103L |
| #define CONSTEXPR constexpr |
| #else |
| #define CONSTEXPR |
| #endif |
| |
| /* |
| * TEMP_FAILURE_RETRY is defined by some, but not all, versions of |
| * <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's |
| * not already defined, then define it here. |
| */ |
| #ifndef TEMP_FAILURE_RETRY |
| /* Used to retry syscalls that can return EINTR. */ |
| #define TEMP_FAILURE_RETRY(exp) ({ \ |
| typeof (exp) _rc; \ |
| do { \ |
| _rc = (exp); \ |
| } while (_rc == -1 && errno == EINTR); \ |
| _rc; }) |
| #endif |
| |
| #endif /* __LIB_UTILS_COMPAT_H */ |