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95 lines
2.6 KiB
95 lines
2.6 KiB
/* |
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* Copyright (C) 2010 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef __LIB_UTILS_COMPAT_H |
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#define __LIB_UTILS_COMPAT_H |
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#include <unistd.h> |
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#if !defined(__MINGW32__) |
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#include <sys/mman.h> |
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#endif |
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#if defined(__APPLE__) |
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/* Mac OS has always had a 64-bit off_t, so it doesn't have off64_t. */ |
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static_assert(sizeof(off_t) >= 8, "This code requires that Mac OS have at least a 64-bit off_t."); |
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typedef off_t off64_t; |
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static inline void* mmap64(void* addr, size_t length, int prot, int flags, int fd, off64_t offset) { |
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return mmap(addr, length, prot, flags, fd, offset); |
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} |
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static inline off64_t lseek64(int fd, off64_t offset, int whence) { |
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return lseek(fd, offset, whence); |
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} |
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static inline ssize_t pread64(int fd, void* buf, size_t nbytes, off64_t offset) { |
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return pread(fd, buf, nbytes, offset); |
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} |
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static inline ssize_t pwrite64(int fd, const void* buf, size_t nbytes, off64_t offset) { |
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return pwrite(fd, buf, nbytes, offset); |
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} |
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static inline int ftruncate64(int fd, off64_t length) { |
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return ftruncate(fd, length); |
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} |
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#endif /* __APPLE__ */ |
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#if defined(_WIN32) |
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#define O_CLOEXEC O_NOINHERIT |
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#define O_NOFOLLOW 0 |
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#define DEFFILEMODE 0666 |
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#endif /* _WIN32 */ |
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#define ZD "%zd" |
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#define ZD_TYPE ssize_t |
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/* |
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* Needed for cases where something should be constexpr if possible, but not |
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* being constexpr is fine if in pre-C++11 code (such as a const static float |
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* member variable). |
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*/ |
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#if __cplusplus >= 201103L |
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#define CONSTEXPR constexpr |
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#else |
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#define CONSTEXPR |
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#endif |
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/* |
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* TEMP_FAILURE_RETRY is defined by some, but not all, versions of |
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* <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's |
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* not already defined, then define it here. |
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*/ |
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#ifndef TEMP_FAILURE_RETRY |
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/* Used to retry syscalls that can return EINTR. */ |
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#define TEMP_FAILURE_RETRY(exp) ({ \ |
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decltype (exp) _rc; \ |
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do { \ |
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_rc = (exp); \ |
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} while (_rc == -1 && errno == EINTR); \ |
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_rc; }) |
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#endif |
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#if defined(_WIN32) |
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#define OS_PATH_SEPARATOR '\\' |
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#else |
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#define OS_PATH_SEPARATOR '/' |
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#endif |
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#endif /* __LIB_UTILS_COMPAT_H */
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