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/*
* 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>
/* Compatibility definitions for non-Linux (i.e., BSD-based) hosts. */
#ifndef HAVE_OFF64_T
#if _FILE_OFFSET_BITS < 64
#error "_FILE_OFFSET_BITS < 64; large files are not supported on this platform"
#endif /* _FILE_OFFSET_BITS < 64 */
typedef off_t off64_t;
static inline off64_t lseek64(int fd, off64_t offset, int whence) {
return lseek(fd, offset, whence);
}
#ifdef HAVE_PREAD
static inline ssize_t pread64(int fd, void* buf, size_t nbytes, off64_t offset) {
return pread(fd, buf, nbytes, offset);
}
#endif
#endif /* !HAVE_OFF64_T */
#if HAVE_PRINTF_ZD
# define ZD "%zd"
# define ZD_TYPE ssize_t
#else
# define ZD "%ld"
# define ZD_TYPE long
#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 */
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