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 <sys/types.h>
  23
  24 #ifdef __linux__
  25
  26 extern int compat_sync_file_range(int fd, off64_t offset, off64_t nbytes,
  27                 unsigned int flags);
  28 #define lttng_sync_file_range(fd, offset, nbytes, flags) \
  29         compat_sync_file_range(fd, offset, nbytes, flags)
  30
  31 #elif (defined(__FreeBSD__) || defined(__CYGWIN__))
  32
  33 #include <errno.h>
  34
  35 typedef long long off64_t;
  36 #ifdef __FreeBSD__
  37 typedef off64_t loff_t;
  38 #endif
  39
  40
  41 /*
  42  * Possible flags under Linux. Simply nullify them and avoid wrapper.
  43  */
  44 #define SYNC_FILE_RANGE_WAIT_AFTER    0
  45 #define SYNC_FILE_RANGE_WAIT_BEFORE   0
  46 #define SYNC_FILE_RANGE_WRITE         0
  47
  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 #define POSIX_FADV_DONTNEED 0
  57
  58 static inline int lttng_sync_file_range(int fd, off64_t offset,
  59                 off64_t nbytes, unsigned int flags)
  60 {
  61         return -ENOSYS;
  62 }
  63
  64 static inline ssize_t splice(int fd_in, loff_t *off_in, int fd_out, loff_t *off_out,
  65                 size_t len, unsigned int flags)
  66 {
  67         return -ENOSYS;
  68 }
  69
  70 static inline int posix_fadvise(int fd, off_t offset, off_t len, int advice)
  71 {
  72         return -ENOSYS;
  73 }
  74
  75 #else
  76 #error "Please add support for your OS."
  77 #endif /* __linux__ , __FreeBSD__, __CYGWIN__ */
  78
  79 #endif /* _COMPAT_FCNTL_H */