workbench/fs/pipe/pipesched.h

   1 /****************************************************************************
   2 **  File:       pipesched.h
   3 **  Program:    pipe-handler - an AmigaDOS handler for named pipes
   4 **  Version:    1.1
   5 **  Author:     Ed Puckett      qix@mit-oz
   6 **
   7 **  Copyright 1987 by EpAc Software.  All Rights Reserved.
   8 **
   9 **  History:    05-Jan-87       Original Version (1.0)
  10 **              07-Feb-87       Added "lockct" check in CheckWaiting().
  11 */
  12
  13
  14
  15 typedef enum iotype
  16   { PIPEREAD,
  17     PIPEWRITE,
  18     PIPERW
  19   }
  20 IOTYPE;
  21
  22
  23 struct pipewait
  24   { BYTE    *buf;        /* the next position for read/write */
  25     ULONG   len;         /* the remaining length t read/write */
  26     IOTYPE  reqtype;     /* PIPEREAD or PIPEWRITE only */
  27   };
  28
  29
  30 struct tapwait
  31   { struct DosPacket   *clientpkt;     /* the client's packet */
  32     struct FileHandle  *handle;        /* the associated filehandle */
  33   };
  34
  35
  36 union pktinfo
  37   { struct pipewait  pipewait;     /* for packet waiting on pipe */
  38     struct tapwait   tapwait;      /* for packet waiting on tap */
  39   };
  40
  41
  42 typedef struct waitingdata
  43   { PIPELISTNODE      link;        /* for list use */
  44     struct DosPacket  *pkt;        /* the packet we are waiting on */
  45     union pktinfo     pktinfo;     /* data pertaining to the waiting request */
  46   }
  47 WAITINGDATA;
  48
  49
  50
  51 extern void              StartPipeIO    ( /* pipe, pkt, iotype */ );
  52 extern void              CheckWaiting   ( /* pipe */ );
  53 extern struct DosPacket  *AllocPacket   ( /* ReplyPort */ );
  54 extern void              FreePacket     ( /* pkt */ );
  55 extern void              StartTapIO     ( /* pkt, Type, Arg1, Arg2, Arg3, Handler */ );
  56 extern void              HandleTapReply ( /* pkt */ );