Mercurial > hg > Members > kono > os9 > sbc09
comparison CoCoOS9/defs/pipedefs @ 31:bd2b07db8917 cocoos9lv2v3
CoCoOS9 version
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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| date | Sat, 14 Jul 2018 15:16:13 +0900 |
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| 30:7b1b25ff010a | 31:bd2b07db8917 |
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| 1 nam PipeDefs | |
| 2 ttl OS-9 Pipe Definitions | |
| 3 | |
| 4 * OS-9 Pipe Definitions | |
| 5 * | |
| 6 * IOMan equates duplicated for PipeMan use | |
| 7 * | |
| 8 | |
| 9 NPATHS set 16 ;Maximum local paths per task -- must match IOMan | |
| 10 NameMax set 29 ;Maximum length of a file name | |
| 11 | |
| 12 * | |
| 13 * Device Driver Static Storage Layout | |
| 14 * | |
| 15 org V.User | |
| 16 V.List rmb 2 ;Pointer to 1st pipe's pipe buffer | |
| 17 PManMem equ . ;Device driver memory (drive table equivalent) | |
| 18 | |
| 19 * | |
| 20 * Pipe Buffer Data Structure | |
| 21 * | |
| 22 org 0 | |
| 23 PP.PD rmb 2 ;Pointer to shared path descriptor | |
| 24 PP.Next rmb 2 ;Pointer to next pipe buffer in system map | |
| 25 PP.Prev rmb 2 ;Pointer to previous pipe buffer in system map | |
| 26 PP.Rsrv rmb 2 ;Reserved | |
| 27 PP.Data equ . ;Data buffer begins at this offset | |
| 28 | |
| 29 * | |
| 30 * Unique Path Descriptor Variables | |
| 31 * | |
| 32 org PD.FST | |
| 33 *** PP.Read must have bit 4 clear; PP.Writ must be PP.Read XOR 4 | |
| 34 PD.Read equ . | |
| 35 PD.RPID rmb 1 ;Process ID of reader waiting on signal | |
| 36 PD.RCT rmb 1 ;Number of blocked readers | |
| 37 PD.RSIG rmb 1 ;Signal to send reader | |
| 38 PD.REOR rmb 1 ;Read EOR character | |
| 39 PD.Writ equ . | |
| 40 PD.WPID rmb 1 ;Process ID of writer waiting on signal | |
| 41 PD.WCT rmb 1 ;Number of blocked writers | |
| 42 PD.WSIG rmb 1 ;Signal to send writer | |
| 43 PD.WEOR rmb 1 ;Write EOR character (dummy) | |
| 44 *** End of special section | |
| 45 PD.End rmb 2 ;Pointer to end of pipe buffer | |
| 46 PD.NxtI rmb 2 ;Next in pointer | |
| 47 PD.NxtO rmb 2 ;Next out pointer | |
| 48 PD.RFlg rmb 1 ;"Ready" flag | |
| 49 PD.Wrtn rmb 1 ;"Written" flag | |
| 50 PD.BCnt rmb 2 ;# queue elements currently bufered | |
| 51 PD.Own rmb 1 ;Process ID of pipe original creator | |
| 52 PD.Keep rmb 1 ;Non-zero if pipe has been kept open artificailly | |
| 53 PD.QSiz rmb 2 ;Max. elements in queue (copied from OPT section) | |
| 54 | |
| 55 * | |
| 56 * Path descriptor option section | |
| 57 * | |
| 58 * Note that PD.Name overlaps with the last byte of PD.ECnt. | |
| 59 * PD.ECnt is copied to PD.QSiz as part of OPEN or CREATE, | |
| 60 * to make room for the pipe name. | |
| 61 * | |
| 62 org (PD.OPT+1) | |
| 63 PD.ESiz rmb 1 ;Size of each queue element | |
| 64 PD.ECnt rmb 2 ;Max. elements in queue (initial position) | |
| 65 | |
| 66 * | |
| 67 * Device Descriptor definitions | |
| 68 * | |
| 69 IT.PDC equ $12 ;Pipe device class (like IT.DTP, IT.DVC) | |
| 70 org IT.PDC | |
| 71 rmb 1 ;Leave room for device class | |
| 72 IT.ESiz rmb 1 ;Size of each queue element | |
| 73 IT.ECnt rmb 2 ;Max. elements in queue (initial position) | |
| 74 | |
| 75 * End of pipedefs | |
| 76 |