src/common/compat/fcntl.hpp

   1 /*
   2  * Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef _COMPAT_FCNTL_H
   9 #define _COMPAT_FCNTL_H
  10
  11 #include <fcntl.h>
  12 #include <sys/types.h>
  13
  14 #include <common/compat/errno.hpp>
  15
  16 static_assert(sizeof(off_t) == sizeof(int64_t),
  17               "Build system is misconfigured, off_t must be 64-bit wide");
  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, off_t offset, off_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(
  40                 int fd __attribute__((unused)),
  41                 off_t offset __attribute__((unused)),
  42                 off_t nbytes __attribute__((unused)),
  43                 unsigned int flags __attribute__((unused)))
  44 {
  45         return -ENOSYS;
  46 }
  47 #endif
  48
  49 #if (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__))
  50 /*
  51  * Possible flags under Linux. Simply nullify them and avoid wrappers.
  52  */
  53 #define SPLICE_F_MOVE       0
  54 #define SPLICE_F_NONBLOCK   0
  55 #define SPLICE_F_MORE       0
  56 #define SPLICE_F_GIFT       0
  57
  58 static inline ssize_t splice(
  59                 int fd_in __attribute__((unused)),
  60                 loff_t *off_in __attribute__((unused)),
  61                 int fd_out __attribute__((unused)),
  62                 loff_t *off_out __attribute__((unused)),
  63                 size_t len __attribute__((unused)),
  64                 unsigned int flags __attribute__((unused)))
  65 {
  66         return -ENOSYS;
  67 }
  68 #endif
  69
  70 #if !(defined(__linux__) || defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__) || defined(__APPLE__))
  71 #error "Please add support for your OS."
  72 #endif /* __linux__ , __FreeBSD__, __CYGWIN__, __sun__, __APPLE__ */
  73
  74 #endif /* _COMPAT_FCNTL_H */