65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*
|
|
* 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 */
|