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annotate defs/pipedefs @ 2642:11e6f408141f

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Now properly putting shadow value in place.
author Boisy Pitre <boisy.pitre@nuance.com>
date Tue, 28 Feb 2012 23:31:24 -0600
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1 IFNE PIPEDEFS-1
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3 PIPEDEFS SET 1
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4
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5 ********************************************************************
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6 * PipeDefs - Pipe File Manager Definitions
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7 *
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8 * $Id$
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9 *
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10 * Edt/Rev YYYY/MM/DD Modified by
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11 * Comment
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12 * ------------------------------------------------------------------
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13 * 1988/12/03 Chris J. Burke
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14 * Coded from new PIPEMAN comments.
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16 NAM PipeDefs
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17 TTL Pipe File Manager Definitions
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18
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19 *
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20 * IOMan equates duplicated for PipeMan use
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21 *
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22
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23 NPATHS SET 16 ;Maximum local paths per task -- must match IOMan
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24 NameMax SET 29 ;Maximum length of a file name
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25
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26 *
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27 * Device Driver Static Storage Layout
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28 *
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29 ORG V.User
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30 V.List RMB 2 ;Pointer to 1st pipe's pipe buffer
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31 PManMem EQU . ;Device driver memory (drive table equivalent)
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32
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33 *
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34 * Pipe Buffer Data Structure
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35 *
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36 ORG 0
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37 PP.PD RMB 2 ;Pointer to shared path descriptor
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38 PP.Next RMB 2 ;Pointer to next pipe buffer in system map
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39 PP.Prev RMB 2 ;Pointer to previous pipe buffer in system map
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40 PP.Rsrv RMB 2 ;Reserved
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41 PP.Data EQU . ;Data buffer begins at this offset
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42
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43 *
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44 * Unique Path Descriptor Variables
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45 *
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46 ORG PD.FST
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47 *** PP.Read must have bit 4 clear; PP.Writ must be PP.Read XOR 4
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48 PD.Read EQU .
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49 PD.RPID RMB 1 ;Process ID of reader waiting on signal
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50 PD.RCT RMB 1 ;Number of blocked readers
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51 PD.RSIG RMB 1 ;Signal to send reader
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52 PD.REOR RMB 1 ;Read EOR character
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53 PD.Writ EQU .
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54 PD.WPID RMB 1 ;Process ID of writer waiting on signal
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55 PD.WCT RMB 1 ;Number of blocked writers
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56 PD.WSIG RMB 1 ;Signal to send writer
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57 PD.WEOR RMB 1 ;Write EOR character (dummy)
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58 *** End of special section
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59 PD.End RMB 2 ;Pointer to end of pipe buffer
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60 PD.NxtI RMB 2 ;Next in pointer
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61 PD.NxtO RMB 2 ;Next out pointer
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62 PD.RFlg RMB 1 ;"Ready" flag
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63 PD.Wrtn RMB 1 ;"Written" flag
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64 PD.BCnt RMB 2 ;# queue elements currently bufered
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65 PD.Own RMB 1 ;Process ID of pipe original creator
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66 PD.Keep RMB 1 ;Non-zero if pipe has been kept open artificailly
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67 PD.QSiz RMB 2 ;Max. elements in queue (copied from OPT section)
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69 *
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70 * Path descriptor option section
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71 *
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72 * Note that PD.Name overlaps with the last byte of PD.ECnt.
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73 * PD.ECnt is copied to PD.QSiz as part of OPEN or CREATE,
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74 * to make room for the pipe name.
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75 *
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76 ORG (PD.OPT+1)
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77 PD.ESiz RMB 1 ;Size of each queue element
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78 PD.ECnt RMB 2 ;Max. elements in queue (initial position)
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79 IFGT Level-1
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80 ORG (PD.OPT+3)
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81 PD.Name RMB NameMax
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82 ENDC
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84 *
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85 * Device Descriptor definitions
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86 *
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87 IT.PDC EQU $12 ;Pipe device class (like IT.DTP, IT.DVC)
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88 ORG IT.PDC
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89 RMB 1 ;Leave room for device class
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90 IT.ESiz RMB 1 ;Size of each queue element
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91 IT.ECnt RMB 2 ;Max. elements in queue (initial position)
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93 * End of pipedefs
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95 ENDC
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