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 <common/compat/errno.hpp>
  12
  13 #include <fcntl.h>
  14 #include <sys/types.h>
  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, unsigned int flags);
  25 #define lttng_sync_file_range(fd, offset, nbytes, flags) \
  26         compat_sync_file_range(fd, offset, nbytes, flags)
  27
  28 #endif /* __linux__ */
  29
  30 #if (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__))
  31 /*
  32  * Possible flags under Linux. Simply nullify them and avoid wrapper.
  33  */
  34 #define SYNC_FILE_RANGE_WAIT_AFTER  0
  35 #define SYNC_FILE_RANGE_WAIT_BEFORE 0
  36 #define SYNC_FILE_RANGE_WRITE       0
  37
  38 static inline int lttng_sync_file_range(int fd __attribute__((unused)),
  39                                         off_t offset __attribute__((unused)),
  40                                         off_t nbytes __attribute__((unused)),
  41                                         unsigned int flags __attribute__((unused)))
  42 {
  43         return -ENOSYS;
  44 }
  45 #endif
  46
  47 #if (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__))
  48 /*
  49  * Possible flags under Linux. Simply nullify them and avoid wrappers.
  50  */
  51 #define SPLICE_F_MOVE     0
  52 #define SPLICE_F_NONBLOCK 0
  53 #define SPLICE_F_MORE     0
  54 #define SPLICE_F_GIFT     0
  55
  56 static inline ssize_t splice(int fd_in __attribute__((unused)),
  57                              loff_t *off_in __attribute__((unused)),
  58                              int fd_out __attribute__((unused)),
  59                              loff_t *off_out __attribute__((unused)),
  60                              size_t len __attribute__((unused)),
  61                              unsigned int flags __attribute__((unused)))
  62 {
  63         return -ENOSYS;
  64 }
  65 #endif
  66
  67 #if !(defined(__linux__) || defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__) || \
  68       defined(__APPLE__))
  69 #error "Please add support for your OS."
  70 #endif /* __linux__ , __FreeBSD__, __CYGWIN__, __sun__, __APPLE__ */
  71
  72 #endif /* _COMPAT_FCNTL_H */