src/common/compat/fcntl.h

   1 /*
   2  * Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #ifndef _COMPAT_FCNTL_H
   9 #define _COMPAT_FCNTL_H
  10
  11 #include <fcntl.h>
  12 #include <errno.h>
  13 #include <sys/types.h>
  14
  15 #if (defined(__CYGWIN__))
  16 typedef long long off64_t;
  17 #endif
  18
  19 #if (defined(__FreeBSD__) || defined(__sun__))
  20 typedef off64_t loff_t;
  21 #endif
  22
  23 #ifdef __linux__
  24 extern int compat_sync_file_range(int fd, off64_t offset, off64_t nbytes,
  25                 unsigned int flags);
  26 #define lttng_sync_file_range(fd, offset, nbytes, flags) \
  27         compat_sync_file_range(fd, offset, nbytes, flags)
  28
  29 #endif /* __linux__ */
  30
  31 #if (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__))
  32 /*
  33  * Possible flags under Linux. Simply nullify them and avoid wrapper.
  34  */
  35 #define SYNC_FILE_RANGE_WAIT_AFTER    0
  36 #define SYNC_FILE_RANGE_WAIT_BEFORE   0
  37 #define SYNC_FILE_RANGE_WRITE         0
  38
  39 static inline int lttng_sync_file_range(int fd, off64_t offset,
  40                 off64_t nbytes, unsigned int flags)
  41 {
  42         return -ENOSYS;
  43 }
  44 #endif
  45
  46 #if (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__))
  47 /*
  48  * Possible flags under Linux. Simply nullify them and avoid wrappers.
  49  */
  50 #define SPLICE_F_MOVE       0
  51 #define SPLICE_F_NONBLOCK   0
  52 #define SPLICE_F_MORE       0
  53 #define SPLICE_F_GIFT       0
  54
  55 static inline ssize_t splice(int fd_in, loff_t *off_in, int fd_out, loff_t *off_out,
  56                 size_t len, unsigned int flags)
  57 {
  58         return -ENOSYS;
  59 }
  60 #endif
  61
  62 #if !(defined(__linux__) || defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__) || defined(__APPLE__))
  63 #error "Please add support for your OS."
  64 #endif /* __linux__ , __FreeBSD__, __CYGWIN__, __sun__, __APPLE__ */
  65
  66 #endif /* _COMPAT_FCNTL_H */