src/common/compat/fcntl.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <dgoulet@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License, version 2 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #ifndef _COMPAT_FCNTL_H
  19 #define _COMPAT_FCNTL_H
  20
  21 #include <fcntl.h>
  22 #include <errno.h>
  23 #include <sys/types.h>
  24
  25 #if (defined(__FreeBSD__) || defined(__CYGWIN__))
  26 typedef long long off64_t;
  27 #endif
  28
  29 #ifdef __FreeBSD__
  30 typedef off64_t loff_t;
  31 #endif
  32
  33 #ifdef __linux__
  34 extern int compat_sync_file_range(int fd, off64_t offset, off64_t nbytes,
  35                 unsigned int flags);
  36 #define lttng_sync_file_range(fd, offset, nbytes, flags) \
  37         compat_sync_file_range(fd, offset, nbytes, flags)
  38
  39 #endif /* __linux__ */
  40
  41 #if (defined(__FreeBSD__) || defined(__CYGWIN__))
  42 /*
  43  * Possible flags under Linux. Simply nullify them and avoid wrapper.
  44  */
  45 #define SYNC_FILE_RANGE_WAIT_AFTER    0
  46 #define SYNC_FILE_RANGE_WAIT_BEFORE   0
  47 #define SYNC_FILE_RANGE_WRITE         0
  48
  49 static inline int lttng_sync_file_range(int fd, off64_t offset,
  50                 off64_t nbytes, unsigned int flags)
  51 {
  52         return -ENOSYS;
  53 }
  54 #endif
  55
  56 #if (defined(__FreeBSD__) || defined(__CYGWIN__))
  57 /*
  58  * Possible flags under Linux. Simply nullify them and avoid wrappers.
  59  */
  60 #define SPLICE_F_MOVE       0
  61 #define SPLICE_F_NONBLOCK   0
  62 #define SPLICE_F_MORE       0
  63 #define SPLICE_F_GIFT       0
  64
  65 static inline ssize_t splice(int fd_in, loff_t *off_in, int fd_out, loff_t *off_out,
  66                 size_t len, unsigned int flags)
  67 {
  68         return -ENOSYS;
  69 }
  70 #endif
  71
  72 #ifdef __FreeBSD__
  73 #define POSIX_FADV_DONTNEED 0
  74
  75 static inline int posix_fadvise(int fd, off_t offset, off_t len, int advice)
  76 {
  77         return -ENOSYS;
  78 }
  79 #endif
  80
  81 #if !(defined(__linux__) || defined(__FreeBSD__) || defined(__CYGWIN__))
  82 #error "Please add support for your OS."
  83 #endif /* __linux__ , __FreeBSD__, __CYGWIN__ */
  84
  85 #endif /* _COMPAT_FCNTL_H */