headers/private/system/vfs_defs.h

   1 /*
   2  * Copyright 2002-2008, Axel Dörfler, axeld@pinc-software.de.
   3  * Copyright 2013, Ingo Weinhold, ingo_weinhold@gmx.de.
   4  * All rights reserved. Distributed under the terms of the MIT License.
   5  *
   6  * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
   7  * Distributed under the terms of the NewOS License.
   8  */
   9 #ifndef _SYSTEM_VFS_DEFS_H
  10 #define _SYSTEM_VFS_DEFS_H
  11
  12
  13 #include <limits.h>
  14 #include <sys/stat.h>
  15
  16 #include <SupportDefs.h>
  17
  18
  19 struct fd_info {
  20         int             number;
  21         int32   open_mode;
  22         dev_t   device;
  23         ino_t   node;
  24 };
  25
  26
  27 /* maximum write size to a pipe/FIFO that is guaranteed not to be interleaved
  28    with other writes (aka {PIPE_BUF}; must be >= _POSIX_PIPE_BUF) */
  29 #define VFS_FIFO_ATOMIC_WRITE_SIZE      PIPE_BUF
  30
  31 /* pipe/FIFO buffer capacity */
  32 #define VFS_FIFO_BUFFER_CAPACITY        (64 * 1024)
  33
  34 // make sure the constant values are sane
  35 #if VFS_FIFO_ATOMIC_WRITE_SIZE < _POSIX_PIPE_BUF
  36 #       error VFS_FIFO_ATOMIC_WRITE_SIZE < _POSIX_PIPE_BUF!
  37 #endif
  38
  39
  40 #endif  /* _SYSTEM_VFS_DEFS_H */