posix/include/psx/fdtable.h

   1 /* $Id: fdtable.h,v 1.3 2002/03/11 20:50:49 hyperion Exp $
   2  */
   3 /*
   4  * psx/fdtable.h
   5  *
   6  * POSIX+ subsystem file descriptor table data structure
   7  *
   8  * This file is part of the ReactOS Operating System.
   9  *
  10  * Contributors:
  11  *  Created by KJK::Hyperion <noog@libero.it>
  12  *
  13  *  THIS SOFTWARE IS NOT COPYRIGHTED
  14  *
  15  *  This source code is offered for use in the public domain. You may
  16  *  use, modify or distribute it freely.
  17  *
  18  *  This code is distributed in the hope that it will be useful but
  19  *  WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
  20  *  DISCLAMED. This includes but is not limited to warranties of
  21  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  22  *
  23  */
  24 #ifndef __PSX_FDTABLE_H_INCLUDED__
  25 #define __PSX_FDTABLE_H_INCLUDED__
  26
  27 /* INCLUDES */
  28 #include <limits.h>
  29 #include <inttypes.h>
  30 #include <stddef.h>
  31 #include <psx/safeobj.h>
  32
  33 /* OBJECTS */
  34
  35 /* TYPES */
  36 typedef struct __tagfildes_t
  37 {
  38  void  *FileHandle;
  39  int    OpenFlags;
  40  int    FdFlags;
  41  size_t ExtraDataSize;
  42  void  *ExtraData;
  43 } __fildes_t;
  44
  45 typedef struct __tagfdtable_t
  46 {
  47  __magic_t   Signature;
  48  int32_t     LowestUnusedFileNo;
  49  int32_t     UsedDescriptors;
  50  int32_t     AllocatedDescriptors;
  51  uint32_t    DescriptorsBitmap[OPEN_MAX / 32];
  52  __fildes_t *Descriptors;
  53 } __fdtable_t;
  54
  55 /* CONSTANTS */
  56
  57 /* PROTOTYPES */
  58 int __fdtable_init(__fdtable_t *);
  59 int __fdtable_free(__fdtable_t *);
  60
  61 int         __fdtable_entry_isavail(__fdtable_t *, int);
  62 int         __fdtable_entry_nextavail(__fdtable_t *, int);
  63 int         __fdtable_entry_add(__fdtable_t *, int, __fildes_t *, __fildes_t **);
  64 int         __fdtable_entry_remove(__fdtable_t *, int);
  65 __fildes_t *__fdtable_entry_get(__fdtable_t *, int);
  66
  67 /* MACROS */
  68 #define __FDTABLE_MAGIC MAGIC('F', 'D', 'T', 'B')
  69
  70 #endif /* __PSX_FDTABLE_H_INCLUDED__ */
  71
  72 /* EOF */
  73