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TITLE GLXIPC  --  IPCF INTERFACE FOR GALAXY PROGRAMS
SUBTTL Cliff Romash & Irwin L. Goverman/CER/PJT/DC/MLB/RCB  25-Aug-84

;
;
;        COPYRIGHT (c) 1975,1976,1977,1978,1979,1980,1981,1982,
;			 1983,1984,1985,1986
;                    DIGITAL EQUIPMENT CORPORATION
;			 ALL RIGHTS RESERVED.
;
;     THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY  BE  USED
;     AND COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE
;     AND WITH THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE.   THIS
;     SOFTWARE  OR ANY OTHER COPIES THEREOF MAY NOT BE PROVIDED OR
;     OTHERWISE MADE AVAILABLE TO ANY OTHER PERSON.  NO  TITLE  TO
;     AND OWNERSHIP OF THE SOFTWARE IS HEREBY TRANSFERRED.
;
;     THE INFORMATION  IN  THIS  SOFTWARE  IS  SUBJECT  TO  CHANGE
;     WITHOUT  NOTICE  AND SHOULD NOT BE CONSTRUED AS A COMMITMENT
;     BY DIGITAL EQUIPMENT CORPORATION.
;
;     DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY
;     OF  ITS  SOFTWARE  ON  EQUIPMENT  WHICH  IS  NOT SUPPLIED BY
;     DIGITAL.

	SEARCH	GLXMAC			;SEARCH SUBSYSTEMS SYMBOLS
	PROLOG(GLXIPC,IPC)		;PRODUCE PROLOG CODE

;THE PURPOSE OF THIS MODULE IS TO PROVIDE AN OPERATING SYSTEM INDEPENDENT
;	IPCF INTERFACE TO GALAXY PROGRAMS (OR ANY OTHER PROGRAM WHICH
;	WANTS TO USE IT).

;ALL SUBROUTINES IN THIS MODULE USE ACS S1 AND S2 (1 AND 2) AND GUARANTEE
;	THAT ALL OTHER ACS WILL BE PRESERVED.


	IPCEDT==74			;VERSION NUMBER

SUBTTL Table of contents

;               TABLE OF CONTENTS FOR GLXIPC
;
;
;                        SECTION                                   PAGE
;    1. Table of contents.........................................   2
;    2. Revision History..........................................   3
;    3. Entry Points found in GLXIPC..............................   4
;    4. Global Storage............................................   5
;    5. C%INIT - Initialize the IPCF interface....................   6
;    6. C%CPID - Create a PID.....................................   6
;    7. CHKNAM - See if PIB has a name attached...................  10
;    8. CHKAND - Check PIB to see if account and node pointers specified  10
;    9. C%KPID, C%SPID............................................  11
;   10. C%SEND Routine to send an IPCF Message....................  12
;   11. SNDMSG - Work routine to do actual IPCF send..............  14
;   12. C%INTR - Interrupt level routine to flag message available  16
;   13. C%RECV - Non-blocking IPCF receive........................  16
;   14. C%BRCV - Blocking IPCF Receive............................  16
;   15. RCVMSG - Work routine to do an actual IPCF receive........  17
;   16. C%REL  - Release the last message received................  20
;   17. C%RPRM  Routine to read IPCF Parameters...................  20
;   18. GETPID - Acquire a PID for this job.......................  21
;   19. KILPID  Routine to delete a pid...........................  22
;   20. SPID   - Set a system PID.................................  23
;   21. RSPIDS  Routine to read System Pid tables.................  24
;   22. RSPID Routine to return a system pid......................  25
;   23. C%MAXP  - Read maximum short packet size..................  27
;   24. CPIDI  - Connect PID to specified interrupt channel.......  28
;   25. IPRM Read/Write IPCF parameters...........................  29
;   26. MNPRED/MNPWRT - Read/Write maximum number of PIDS.........  30
;   27. QTARED/QTAWRT - Read/Write the Send and Receive Quotas....  31
;   28. SETNAM - Routine to declare our name to INFO..............  32
;   29. SNDSYS - Routine to converse with [SYSTEM]INFO & IPCC.....  33
;   30. STAC   - Routine to build INFO messages...................  35
;   31. C%PIDJ  Returb PID owners job number......................  36

SUBTTL Revision History

COMMENT \

Edit	  GCO	Reason
----    ------- -------------------------------------------------------
0001		Initial version of GLXIPC
0002		Make sending to PID 0 illegal
0003		Convert to new OTS format
0004		Add better send failure recovery code
		  Also, receive packets .GT. short packet size if they come
0005	G012	Change the definition of the 'capabilties' word in the MDB
		to contain a canonical set of capabilities rather than the
		operating-system specific capabilities.  It also contains
		the senders job number.
0006	G016	On the -10, don't try to determine the length of the System
		PID table before doing the GETTABs.  Just do SZ.PID GETTABs.

0007		Change the debugging system so that 'alternates' are used
		only if DEBUGW is set.
0010	G025	Change the DEBUGW so that  a non-zero value enables
		the DEBUGGING System while a negative value will
		declare a private component to SYSTEM[INFO].
		Also fix C%RECV so that MD%PWH is only turned on with
		JACCT on the -10.
0011	G026	FIX RSEFLG ACTION TO RETURN ON ERRORS AND LOOP THE
		PROPER NUMBER OF TIMES IF NOT SET
0012	G027	MAKE C%RECV USE THE ASSOCIATED VARIABLE NAD DO PAGE 
		CHECK FIRST
0013	G052	Fix C%RECV to Destroy non-existent page if failed on 
		page mode due to wrong mode
0014		Remove DEBUGW test to set quotas and job wide pid
		Also -- convert some$STOP messages to $FATAL and
		some $TEXT to $WARN
0015		Made extensive changes to Debugging code and initializtion
		code.  Added error code ERICA$ to use in range checks.
		Modified RSPIDS to do alternate search based on DEBUGW
		and a special name table.  
		Modified C%SEND to clear the internal pid table entry
		if a send to a system pid fails.
0016		Fixed TOPS20 code in KILPID and SNDSYS to work properly
0017		Fixed SNDSYS to save SNDFLG
0020		Cosmetic cleanup.  Changed ERICA$ to ERARG$ for
		errors which are caused by bad calling args.
		Corrected spelling.
		Added "PULSAR" name for SP.TLP
0021		Use SPIDS macro to make up SPDNAM
0022		Change C%INIT to setup debugging names based on SPIDS,
		Not on contents of the IB
		The degugging flag DEBUGW (135) now has 2, not 3 meanings
		0== off, -1 == on.  If it is ON, and the IB says to become
		a system PID, then C%INIT uses the name in the SPIDS table
		to declare [p,pn]NAME to system info
0023		Install PIB and multiple PID support
0024		Print Becomming PID message only if Debugging. Make getting
		of maximum packet size a Library entry Point (C%MAXP)
0025		Make getting maximum packet size a part of C%INIT
		even if no PIB is specified in IB
0026		Preserve RCVMDB+MDB.MS durring SNDSYS so C%REL will
		always work after sending to a system component in
		in DEBUG mode
0027		Make C%PIDJ entry to return Pid's job number
0030		Make C%KPID work for -10.  Kill named PIDs via INFO only,
		and unnamed PIDs via IPCC, then INFO if that fails.
0031		Fix setting of Maximum number of Pids to first
		Read the number then increment and write it out
0032		Change SAVE to $SAVE
0033		Fix Maximum PID setting Bug
0034		Make MAXPAK a global variable
0035		Return ARG if sending a 0 length message
0036		Return ARG if attempting to SNDMSG with a 0 PID
0037		TOPS10 - Set job # as PID when conversing with
		INFO or IPCC to get a PID.
0040		Write system PID table after setting MYPID
0041		Fix a bug in wait logic if debugging and the component
		does not yet exist.
0042		-10, Set Job number as PID
		while asking INFO for PIDs of debugging
		system components
0043		CHANGE THE SEND QUOTA SETTINGS TO READ THE CURRENT
		SETTING AND THEN ADD TO IT
0044		Add support for sending to any arbitrary process
		by name.
		Never send pages to the system gopher, send them
		as large (510 wd max) packets.
0045		Just a recompile to pick up new value for SZ.PAK
0046		Return the located node if requested in PIB block for
		TOPS10.
0047		Zero out out own $DATA space and comment out instructions
		that used to zero out particular locations.
0050		If no IPCF privs and SYSINF not running then $FATAL error

0051		Set OPR priv in C%RECV if message received from a special
		pid while debugging.

0052		Add support for using job numbers as PIDs.

0053		Fix a problem with SNDSYS flushing the IPCF queue looking
		for the response from [SYSTEM]IPCC.

0054		Only type out "% GLXIPC alternate..." when debugging.

0055		Prevent IFN, BPN, and ILM stopcodes. Routine STAC IDPBs 1
		byte too far.

0056		Fix bug in SNDSYS which caused MDA's pid to not be defined.

0057		FIX IPRM.1 TO DO THE CORRECT THING FOR BOTH TOPS10
		AND TOPS20.

0060	3/7/81	Change reference to .JBOPS to the general symbol DEBUGW

0061	9/14/81	Fix FNDNAM bug and make sure we always return the PID in S1

0062	12/15/81 Handle error return from M%IPRM.

0063	1372	Prevent unprived user from becoming godly by clearing junk in
		AC before setting up priv bits in MDB.PV

0064	G1394	Insure all messages get received by setting MSGFLG early.

0065	8-Feb-84 /DPM
		Increased monitor free core usage could be attributed to
		the fact that GLXIPC always sends 510 word packets to the
		GOPHER.  Make it send exact length packets instead.

0066	10055	26-Mar-84 /DPM
		Add support for flag word in the SAB and return useful
		priv bits.

0067	10079	14-Aug-84 /RCB
		Include new IPCFM. code for efficient use under 7.03.

0070	10084	28-Aug-84 /RCB
		Include fallback code for 7.02, and finish the IPCFM. code
		for talking to [SYSTEM]INFO.

0071	10095	11-Sep-84 /RCB
		Fix the fallback code.

0072	10261	23-Jul-85 /RCB
		Fix more fallback code (GETTAB of .GTPID).

0073	10267	30-Jul-85 /RCB
		More of above (%IPCPM).

0074	10307	22-Oct-85 /RCB
		Fix some FTFLBK problems.

\  ;END OF REVISION HISTORY

	SUBTTL Entry Points found in GLXIPC

	ENTRY	C%INIT			;INITIALIZE THE MODULE
	ENTRY	C%CPID			;CREATE A PID
	ENTRY	C%SPID			;SET DEFAULT SENDER PID
	ENTRY	C%KPID			;KILL A PID
	ENTRY	C%RPRM			;READ IPCF PARAMETERS
	ENTRY	C%INTR			;POST AN IPCF INTERRUPT
	ENTRY	C%SEND			;SEND AN IPCF MESSAGE
	ENTRY	C%RECV			;NON-BLOCKING IPCF RECEIVE
	ENTRY	C%BRCV			;BLOCKING IPCF RECEIVE
	ENTRY	C%REL			;RELEASE LAST IPCF MESSAGE
	ENTRY	C%MAXP			;MAX PACKET SIZE ENTRY POINT
	ENTRY	C%PIDJ			;RETURN PID OWNERS JOB NUMBER
	ENTRY	C%PIDH			;RETURN PID OWNER'S JCH
	ENTRY	C%SIDX			;RETURN SYSTEM INDEX FOR PID

SUBTTL Global Storage

	$DATA	IPCBEG,0		;START OF ZEROABLE $DATA SPACE
	$GDATA	MYPID			;PROCESS IDENTIFIER
	$DATA	DEFPID			;Default (ie first) PID
	$DATA	FSTPFG			;Set after we define first PID
	$GDATA	IMOPR			;Set if we are ORION
	
	$DATA	PSIFLG			;FLAG SET IF IPCF IS CONNECT TO PSI SYSTEM
	$DATA	SNDFLG			;FLAGS TO USE FOR SEND
	$DATA	RCVFLG			;FLAGS TO USE FOR RECIEVE
	$DATA	RCVPAG			;PAGSIZ,,PAGADR RESERVED FOR RECV
	$DATA	MSGFLG			;SET AT INTERRUPT LEVEL (IF PSI USED)
	$GDATA	RSEFLG			;RETURN SEND ERROR FLAG


	$DATA	IPCINT			;INTERRUPT ADDRESS FOR IPCF STATUS
	$DATA	IPCSTS			;IPCF STATUS..ASSOCIATED VARIABLE
	$DATA	PIDTAB,SZ.PID		;TABLE OF SYSTEM PIDS
	$DATA	ALTNAM,SZ.PID		;Table of alternate names for system
					;components.  Debuggers can poke
					;a slot to -1 to force a debugging library
					;to talk to that system component.
					;Or, the address of an ASCIZ string can
					;be poked in to force a debugging
					;library to talk to that named component
					;instead of the standard library
					;debugging conventions.

	$DATA	STACP			;BYTE POINTER FOR NAME CREATION
	$DATA	STACL			;MAX CHARACTER LIMIT FOR NAMED PIDS

	MTLSIZ==SZ.INF/5+3		;MAXIMUM PACKET SIZE FOR INFO NAMES
	$DATA	MTLBLK,MTLSIZ		;IPCFM BLOCK

	SYSPRM	(IPCSLN,4,.IPCFP+1)	;Length of a send block
	SYSPRM	(IPCRLN,.IPCFC+1,.IPCLL+1) ;Length of a receive block
	$DATA	SNDBLK,IPCSLN		;IPCF SEND PACKET DESCRIPTOR BLOCK
	$DATA	RCVBLK,IPCRLN		;IPCF RECEIVE PDB

	$DATA	SNDSAB,SAB.SZ		;PLACE TO BUILD A SAB INTO
	$DATA	RCVMDB,MDB.SZ		;PLACE TO BUILD MDB INTO
	$DATA	ACTPTR			;POINTER TO USER AREA FOR ACCT STRING
	$DATA	NODPTR			;POINTER TO USER AREA FOR NODE STRING
	$DATA	PACKET,SZ.PAK		;PLACE TO RECEIVE SHORT MESSAGE INTO
IFN FTFLBK,<
	$DATA	QUELOK			;LOCK FOR THE INTERNAL IPCF QUEUE
	$DATA	IPCQUE			;LINK LIST ID OF THE INTERNAL IPCF QUEUE
	$DATA	OLDMON			;MONITOR WITHOUT IPCFM. UUO
	$DATA	NEWSID			;NEW SYSTEM PID UNDER OLD MONITOR
	$DATA	MAXSID			;MAXIMUM SYSTEM PID KNOWN TO MONITOR
>
	$DATA	OPRPPN			;PPN OF THE OPERATOR
	$DATA	MNTPPN			;PPN FOR MAINT PRIVS
	$DATA	IPCEND,0		;END OF ZEROABLE $DATA SPACE

;SPDNAM TABLE TO SETUP SEARCH FOR SPECIAL SYSTEM PIDS BY NAME

DEFINE .SPID(CANNAM,T10IDX,T20IDX,SYMNAM),<
IFNB <SYMNAM>,<
	$SET	(CANNAM,,<-1,,[ASCIZ/SYMNAM/]>)
>;;END IFNB SYMNAM
>;End DEFINE .SPID

SPDNAM:	$BUILD	(SZ.PID)
	SPIDS				;Generate the Special names
	$EOB


; INDIRECT TEXT STRINGS TO USE FOR BUILDING INFO NAME

NAMTXT:	ITEXT(<^U/DEBUGW/^Q/S1/>) 	;OUR NAME+CUSP 
SYSTXT:	ITEXT(<[SYSTEM]^Q/S1/>)		;SYSTEM NAME+CUSP


	DEFINE	$SLEEP(TIME),<
	XLIST
	MOVEI S1,TIME			;;GET THE TIME TO SLEEP IN SECONDS
	SLEEP S1,			;;GO TO SLEEP
	LIST>

SUBTTL	C%INIT - Initialize the IPCF interface

; Initializes IPCF interface, acquires PID and does alternate search.

;CALL IS:	IIB setup by I%INI1 in GLXINT
	
;TRUE RETURN:	Always, PID stored in the IIB

C%INIT:	MOVE	S1,[IPCBEG,,IPCBEG+1]	;BLT PTR TO ZEROABLE $DATA SPACE
	SETZM	IPCBEG			;ZERO THE FIRST LOC
	BLT	S1,IPCEND-1		;AND DO THE REST WITH A BLT
IFN FTFLBK,<
	MOVE	S1,[%CNDAE]		;MONITOR VERSION GETTAB
	GETTAB	S1,			;FIND IT
	  SETZ	S1,			;NOT THERE?!?
	HRRZS	S1			;ISOLATE BINARY VERSION
	CAIGE	S1,703			;DOES THIS MONITOR HAVE IPCFM.?
	 SETOM	OLDMON			;NO, REMEMBER THAT IT'S OLD
	MOVE	S1,[.GTSID,,.GTIDX]	;INDEXING INFO FOR SYSTEM PID TABLE
	GETTAB	S1,			;FETCH IT
	  SETZ	S1,			;SHOULDN'T GET HERE
	HRREM	S1,MAXSID		;SAVE FOR SYSINF CHECKING
>
	SETOM	ALTNAM+SP.IPC		;ALWAYS USE REAL IPCC
	SETOM	ALTNAM+SP.GFR		;AND THE REAL GOPHER
IFN	FTFLBK,<
	SKIPE	OLDMON			;IS IT AN OLD MONITOR?
	 SETOM	ALTNAM+SP.INF		;YES, ALWAYS USE REAL SYSTEM INFO
>
	SKIPN	S2,IIB##+IB.PIB		;Does the caller want to use IPCF?
	$RETT				;No, nothing to do here!
	LOAD	S1,PB.HDR(S2),PB.LEN	;Yes, get length of block in S1
	PUSHJ	P,C%CPID		;Get the PID
	$RETIT				;OK
	$STOP	(CGP,Can't Get a PID)

SUBTTL	C%CPID - Create a PID
;This routine will create a PID, give it a name, connect it to
; the interrupt system, set its quotas, etc, etc, based on the PIB passed.
;Arguments:
;	S1-Length of block
;	S2-Addr of PIB
;Returns:
;	True, all set
;	False,	ERARG$ or ERCGP$
C%CPID:	CAIL	S1,PB.MNS		;Small PIB?
	CAILE	S1,PB.MXS		;.. or big PIB
	$RETE	(ARG)			;No good
	$SAVE	<P1,P2>			;Save some work regs
	DMOVE	P1,S1			;Copy the input args
	SKIPE	FSTPFG			;Has our data base been intialized?
	JRST	CPID.3			;Yes, charge on!
	SKIPN	S2,DEBUGW		;SEE IF DEBUGGING
	JRST	CPID.2			;NOPE
	JUMPL	S2,CPID.1		;DO THE GETPPN IF NEGATIVE
	TLNE	S2,377777		;IF SET ASSUME WE GOT A PPN IN THERE
	TRNN	S2,-1			;IF RH, THEN IS OK
CPID.1:	GETPPN	S2,			;GET THE PPN
	  JFCL				;INFAMOUS SKIP RETURN
	MOVEM	S2,DEBUGW		;SAVE UPDATED COPY
CPID.2:	SETOM	MSGFLG			;SET MESSAGE AVAILABLE FLAG
	SETZM	SNDFLG			;INIT SEND FLAGS
	MOVX	S1,IP.TTL		;GET TRUNCATE LONG MESSAGE FLAG
	MOVEM	S1,RCVFLG		;INIT RECIEVE FLAGS
	PUSHJ	P,RSPIDS		;READ THE SYSTEM PIDS
	MOVX	S1,%LDFFA		;WE NEED OPR PPN FOR PRIV CHECK
	GETTAB	S1,			;SO GET IT
	  MOVX	S1,<1,,2>		;USE A SUITABLE DEFAULT
	MOVEM	S1,OPRPPN		;SAVE IT
	MOVX	S1,%LDUMD		;GET MAINTANANCE PPN
	GETTAB	S1,
	  MOVX	S1,<6,,6>
	MOVEM	S1,MNTPPN

	;C%INIT	CONTINUED ON NEXT PAGE

	;C%INIT CONTINUED FROM PREVIOUS PAGE

CPID.3:	LOAD	S2,PB.INT(P2),IP.SPI	;GET REQUESTED INDEX
	JUMPE	S2,CPID.5		;JUMP IF WE ARE NOT SYSTEM TO JUST GET A PID
	CAXN	S2,SP.OPR		;Becoming ORION?
	SETOM	IMOPR			;Set flag for .STOP
	SKIPN	S1,PIDTAB(S2)		;IS THERE A PID THERE?
	JRST	CPID.4			;NAME NOT THERE -- MUST GET A PID
	MOVEM	S1,PB.PID(P2)		;Save as ours
	PUSHJ	P,C%PIDJ		;GET PID'S JOB NUMBER
	JUMPF	CPID.4			;NO OWNER -- MUST GET A PID
	CAME	S1,MYJOB##		;IS IT MINE?
	 $FATAL (Requested PID belongs to job ^D/S1/) ;NOPE
	JRST	CPID.8			;NO NEED TO GET A PID
					;We already own that PID

CPID.4:	PUSHJ	P,SYSPID		;SET UP TO GET A SYSTEM PID
	$RETIF				;PROPAGATE FAILURE
	JRST	CPID.7			;GOT IT

;Here if we're not becoming a system PID
CPID.5:	PUSHJ	P,CHKNAM		;Set up name pointers
	JUMPT	CPID.7			;All set, use callers name
					;otherwise, use noname
CPID.6:	SETZ	S2,			;Indicate no name desired
CPID.7:	PUSHJ	P,SETNAM		;Set name in message to IPCC or INFO
	LOAD	S1,PB.FLG(P2),IP.JWP	;Get desired job-wide flag
	PUSHJ	P,GETPID		;GET A PID FOR MY JOB
	JUMPF	[$RETE(CGP)]		;PROPAGATE FAILURE
	MOVEM	S1,PB.PID(P2)		;SAVE ACQUIRED PID
;C%INIT	CONTINUED ON NEXT PAGE

;C%INIT CONTINUED FROM PREVIOUS PAGE

;Here when the PID and requisite name have been set up.
CPID.8:	LOAD	S2,PB.PID(P2)		;Get back pid
	SKIPE	FSTPFG			;First time 'round?
	JRST	CPID.9			;No, the defaults were set last time
	MOVEM	S2,DEFPID		;Save as default for -1 to C%SPID
	MOVEM	S2,MYPID		;That's mine!
	SETOM	FSTPFG			;Note that we've been here
CPID.9:	LOAD	S1,PB.INT(P2),IP.SPI	;GET SPECIAL INDEX FIELD
	SKIPE	S1			;WANT TO BE SYSTEM PID?
	PUSHJ	P,SPID			;YES -- GO SET IT
	JUMPF	[LOAD	S1,PB.PID(P2)	;GET PID AGAIN
		 PUSHJ	P,KILPID	;GET RID OF IT
		 $RETE(CGP)]		;CAN'T GET PID ERROR
	SETO	S1,			;SET TO WRITE IPCF PARAMETERS
	SKIPE	S2,PB.SYS(P2)		;GET IPCF PARAMETER WORD
	PUSHJ	P,IPRM			;MAKE CHANGES
	LOAD	S1,PB.FLG(P2),IP.RSE	;WANT SEND FAILURES RETURNED?
	MOVNM	S1,RSEFLG		;SET OR CLEAR THE FLAG
	LOAD	S1,PB.FLG(P2),IP.SPB	;GET SENDER'S PRIV FLAG
CPID.D:! SKIPN	DEBUGW			;DEBUGGING?
	STORE	S1,RCVFLG,IP.CFP	;NO -- STORE IN RECIEVE FLAGS
	LOAD	S1,PB.INT(P2),IP.CHN	;GET CHANNEL OR OFFSET FOR PSI
	LOAD	S2,PB.FLG(P2),IP.PSI	;SEE WHETHER PSI IS TO BE USED
	MOVNM	S2,PSIFLG		;SET OR CLEAR THE FLAG
	LOAD	S2,PB.PID(P2)		;Get desired PID
	SKIPE	PSIFLG			;IS IPCF CONNECTION WANTED?
	PUSHJ	P,CPIDI			;YES, CONNECT PID TO INTERRUPT SYSTEM
	PUSHJ	P,CHKAND		;Check out account and node pointers
	$RETT				;All done

SUBTTL	SYSPID - Helper for C%CPID to set up to acquire a system PID

;Call with no obvious args
;
;Return set up for CPID.7

SYSPID:	SKIPN	DEBUGW			;Are we debugging?
	JRST	SYSP.1			;No, never bother INFO in production
	PUSHJ	P,CHKNAM		;Set up the name pointer
	$RETIT				;All set, caller has special debug name
					;Otherwise, set up library convention
	LOAD	S2,PB.INT(P2),IP.SPI	;Get back special index
	SKIPN	S1,SPDNAM(S2)		;Get debugging name from table
	$FATAL	(No debugging name for special index ^O/S2/)	;None there
	MOVEI	S2,NAMTXT		;Aim at ITEXT to convert debug name
	$RETT				;Go setup the name, get the PID

SYSP.1:	SETZ	S2,			;ASSUME NO NAME DESIRED
IFN FTFLBK,<
	SETZM	NEWSID			;ALSO ASSUME AN OK SYSTEM PID
	LOAD	S1,PB.INT(P2),IP.SPI	;GET BACK SPECIAL INDEX
	SKIPE	OLDMON			;IF GOOD MONITOR,
	CAMG	S1,MAXSID		;OR IN 7.02 RANGE,
>
	$RETT				;RETURN TO SET UP FOR NULL PID
IFN FTFLBK,<
	SETOM	NEWSID			;NOT AN OK SYSTEM PID
	SKIPN	S1,SPDNAM(S1)		;DOES IT HAVE A NAME?
	 $RETE(CGP)			;NO, CAN'T DO IT
	MOVEI	S2,SYSTXT		;YES, POINT AT ITEXT FOR SYSTEM NAME
	$RETT				;RETURN TO SET UP PID
>

SUBTTL	CHKNAM - See if PIB has a name attached
;Call - P1/ length of PIB
;	P2/ addr of PIB
;Returns - FALSE if PIB is too short or no name pointer in PIB
;	TRUE - S1 has pointer, S2 has ITEXT to it (suitable for SETNAM)

CHKNAM:	CAILE	P1,PB.NAM		;Was a name supplied?
	SKIPN	S1,PB.NAM(P2)		;Was one?
	$RETF				;No, Tell caller there's none

	TLCE	S1,-1			;0 left half
	TLCN	S1,-1			; or -1 left half?
	HRLI	S1,(POINT 7,)		;Yes, make a pointer
	MOVEI	S2,[ITEXT (<^Q/S1/>)]	;Aim at the pointer just built
	$RETT				;Return S1,S2 setup

SUBTTL	CHKAND - Check PIB to see if account and node pointers specified
;Call -	P1/ length of PIB
;	P2/ addr of PIB
;Returns - TRUE (always)

CHKAND:	CAIG	P1,PB.ACT		;Is there an act ptr on the block?
	$RETT				;No, quit
	SKIPE	S1,PB.ACT(P2)		;Get ptr, if any
	MOVEM	S1,ACTPTR		;Save it if there is one
	CAIG	P1,PB.LOC		;Is there a logical location pointer
	$RETT				;No
	SKIPE	S1,PB.LOC(P2)		;Maybe, get it
	MOVEM	S1,NODPTR		;Yes there is, save it
	$RETT				;All done

SUBTTL	C%KPID, C%SPID
;C%KPID - Kill a PID
;	Call - S1/addr of  PIB describing PID to be killed
;	Return, TRUE - PID has been killed, and removed from system tables
;			(if applicable)
;		FALSE - PID wasn't killed,perhaps because
;			insufficient privs, or no such PID
C%KPID:	$SAVE	<P1>			;Save work reg
	MOVE	P1,S1			;Copy input arg
	SKIPN	S1,PB.PID(P1)		;Get PID, if any
	$RETT				;None there, all done!
	LOAD	S2,PB.INT(P1),IP.SPI	;Get special PID index
	SKIPE	S2			;If special index
	SKIPN	DEBUGW			; ... and we're debugging,
	SKIPA				;(Not special, or not debug) skipa
	JRST	KPID.N			; ... must be named, kill via INFO
	$SAVE	<P2>			;Preserve another AC
	PUSH	P,S1			;Save PID to be killed
	MOVE	P2,P1			;Setup addr of PIB
	LOAD	P1,PB.HDR(P2),PB.LEN	;Get length of the PIB
	PUSHJ	P,CHKNAM		;See if this PIB is named
	JUMPF	[POP	P,S1		;No name, Get back PID
		JRST	KPID.U]		;And kill it either way
	POP	P,S1			;There is a name, must kill via INFO
KPID.N:	PUSHJ	P,KILPDN		;Kill via INFO
	SKIPA				;Reenter common flow
KPID.U:	PUSHJ	P,KILPID		;Give it the gong
	$RETIF				;Couldn't do it
	MOVE	S2,PB.PID(P1)		;Get back PID just killed
	MOVSI	S1,-SZ.PID		;Get AOBJN ptr for PIDTAB
KPID.1:	CAMN	S2,PIDTAB(S1)		;Does this one match?
	SETZM	PIDTAB(S1)		;Yes, kill it
	AOBJN	S1,KPID.1		;Check all the pids in our table
	$RETT				;Back to caller

;C%SPID - A routine to set the default send PID
;Call  S1/addr of PIB describing new default or -1 to set original default
;Return - TRUE always
C%SPID:	SKIPGE	S1			;Skip if a PIB is there, otherwise...
	SKIPA	S2,DEFPID		;Get original default PID
	SKIPE	S2,PB.PID(S1)		;Get PID to be set
	MOVEM	S2,MYPID		;Set as our sender default
	$RETT

SUBTTL	C%SEND Routine to send an IPCF Message

;CALL	S1/ Length of SAB
;	S2/ Address of SAB

;TRUE Return if message is sent Successfully

;FALSE Return if message cannot be sent for any reason

;POSSIBLE ERRORS

;	ERARG$		Invalid Calling Argument
;	ERNSP$		No Such Pid
;	ERRQF$		Recievers Quota Full
;	ERSQF$		Senders Quota Full
;	ERSLE$		System Limits Exceeded
;	ERUSE$		Unexpected System Error
;	ERPWA$		System PID went away

C%SEND:	CAXGE	S1,SAB.MZ		;PROPER SAB?
	 $RETE(ARG)			;NO -- RETURN ERROR
	$SAVE	<T1>			;SAVE T1
	MOVE	T1,S1			;COPY SAB LENGTH
	PUSHJ	P,.SAVE2		;PRESERVE P1-P2
	LOAD	P1,SAB.LN(S2)		;P1 IS MESSAGE LENGTH
	MOVE	P2,S2			;P2 IS SAB ADDRESS
	CAIL	P1,0			;MESSAGE LENGTH OK?
	CAILE	P1,PAGSIZ
	 $RETE(ARG)			;NO -- RETURN ERROR
	LOAD	S2,SAB.MS(P2)		;GET MESSAGE ADDRESS
	PUSHJ	P,C%MAXP		;GET MAX. PACKET SIZE
	CAMG	P1,S1			;LARGER THAN A PACKET?
	JRST	SEND.4			;NO -- SEND A PACKET
	CAIN	P1,PAGSIZ		;EXACTLY ONE PAGE?
	JRST	SEND.2			;YES -- GO SEND IT
	$CALL	M%GPAG			;NO -- CREATE A PAGE AND COPY MESSAGE
	HRL	S1,SAB.MS(P2)		;FORM BLT POINTER
	HRRZ	S2,S1			;GET NEW PAGE ADDRESS
	ADDI	S2,0(P1)		;ADDRESS + MESSAGE SIZE
	BLT	S1,-1(S2)		;MOVE ENTIRE MESSAGE TO NEW PAGE
	SUBI	S2,0(P1)		;RECLAIM NEW MESSAGE ADDRESS

;HERE TO SEND A PAGE

SEND.2:	TRNE	S2,PAGSIZ-1		;IS PAGE ON PAGE BOUNDRY?
	 $RETE(ARG)			;NO -- RETURN ERROR
	ADR2PG	S2			;YES -- CONVERT TO PAGE NUMBER
	HRLI	S2,PAGSIZ		;SEND A FULL PAGE
	MOVX	S1,IP.CFV		;GET THE PAGE MODE FLAG
	IORM	S1,SNDFLG		;AND SET IT
	MOVE	S1,P2			;POINT TO SAB
	MOVEI	P2,(S2)			;REMEMBER THE PAGE NUMBER
	PUSHJ	P,SNDMSG		;GO SEND THE MESSAGE
	JUMPT	.POPJ			;ANY ERRORS? NO, RETURN
	CAIN	P1,PAGSIZ		;YES, DID WE SUPPLY THIS PAGE?
	$RET				;NO, USER GAVE US THE PAGE, RETURN F
	$SAVE	<TF,S1>			;SAVE FOR FINAL RETURN
	MOVE	S1,P2			;RECLAIM PAGE NUMBER
	$CALL	M%RELP			;RELEASE THE PAGE WE GOT FOR THE BIG PACKET
	$RET				;RETURN TF AND S1 FROM SNDMSG

;HERE TO SEND A PACKET

SEND.4:	HRL	S2,P1			;FORM LENGTH,,ADDRESS
	MOVX	S1,IP.CFV		;GET PAGE MODE FLAG
	ANDCAM	S1,SNDFLG		;AND CLEAR IT
	MOVE	S1,P2			;POINT TO SAB
	$FALL	SNDMSG			;FALL INTO COMMON CODE AND RETURN

SUBTTL SNDMSG - Work routine to do actual IPCF send

;CALL		S1/ SAB Address
;		S2/ Message Length,,Message Address
;		T1/ SAB LENGTH
;If the message is paged, then a true return will
; leave the page unaddressable, and a false return will leave it addressable

SNDMSG:	$SAVE	<P1,P2,P3,P4>
	DMOVE	P1,S1			;PRESERVE CALLING ARGS
	SKIPN	P3,RSEFLG		;RETURN SEND ERRORS?
	MOVX	P3,RT.SFL		;NO -- LOAD RETRY LIMIT
	MOVE	S1,MYPID		;GET MY PID
	SKIPE	S2,SAB.PB(P1)		;WANT TO SEND FOR A DIFFERENT PID?
	MOVE	S1,PB.PID(S2)		;YES, GET PID FROM PIB ATTACHED TO SAB
	SKIPN	S1			;IS THERE REALLY A PID?
	$RETE	(ARG)			;NO, COMPLAIN
	MOVEM	S1,SNDBLK+.IPCFS	;I AM SENDER
	LOAD	S1,SAB.PD(P1)		;GET RECIEVERS PID OR ADDR OF PID'S NAME
	SETO	P4,			;SYSTEM INDEX OR -1 IF SEND BY PID
	LOAD	S2,SAB.SI(P1),SI.FLG	;GET SPECIAL INDEX FLAG
	JUMPE	S2,SNDM.2		;SEND BY PID? NO, TRY OTHER FEATURES
	LOAD	S1,SAB.SI(P1),SI.IDX	;NO -- SEND BY INDEX
	MOVE	P4,S1			;REMEMBER WHO IT IS
	SKIPN	P3,RSEFLG		;RETURN SEND ERRORS?
	MOVX	P3,RT.SCL		;NO -- GET SYSTEM RETRY LIMIT
SNDM.1:	PUSHJ	P,RSPID			;GET THE RECIEVERS PID
	JUMPT	SNDM.3			;GOT IT, SO SEND TO IT
	CAIE S1,ERNSP$			;UNKNOWN PID FOR SYSTEM COMPONENT?
	$RET				;NO -- RETURN THE ERROR
	CAXN P3,RT.SCL			;YES -- FIRST RETRY?
	SKIPN SPDNAM(P4)		;YES -- DOES PID HAVE A NAME?
	 CAIA				;NO -- DON'T PRINT THE MSG
	SKIPN DEBUGW			;YES -- DEBUGGING?
	 CAIA				;NO -- DON'T PRINT THE MESSAGE
	$WARN (Waiting for ^Q/SPDNAM(P4)/ to start)
	SOJL P3,.POPJ			;RETURN ERROR IF RETRY LIMIT EXAUSTED
	$SLEEP RT.SLP			;SLEEP FOR A WHILE
	MOVE S1,P4			;RETORE DESIRED INDEX
	JRST SNDM.1			;AND TRY AGAIN

SNDM.2:	LOAD	S2,SAB.SI(P1),SI.NAM	;WANT TO SEND TO A NAMED PID?
	JUMPE	S2,SNDM.3		;NO, JUST USE THE PID
	MOVEI	S2,[ITEXT(^Q/S1/)]	;YES, AIM AT THE TEXT (SAB.PD HAS ADDR)
	PUSHJ	P,FNDNAM		;GET THE NAME'S PID FROM INFO
	JUMPF	.POPJ			;QUIT IF INFO CAN'T MAP THE NAME
SNDM.3:	MOVEM	S1,SNDBLK+.IPCFR	;SAVE RECIEVERS PID
	MOVEM	P2,SNDBLK+.IPCFP	;SAVE PAGE/PACKET POINTER
	MOVE	S2,SNDFLG		;GET SEND FLAGS
	CAIG	T1,SAB.FL		;SAB INCLUDE A FLAG WORD?
	TDZA	T1,T1			;NO
	LOAD	T1,SAB.FL(P1),SF.ECD	;GET ERROR CODE TO RETURN
	STORE	T1,S2,IP.CFE		;SET
	CAME	S1,PIDTAB+SP.GFR	;SENDING TO SYSTEM GOPHER?
	CAMN	S1,PIDTAB+SP.IPC	;SENDING TO IPCC?
	IORX	S2,IP.CFP		;YES -- ENABLE PRIVS
	SETZ	P1,			;CLEAR PAGE MODE TO GOPHER FLAG
	CAMN	S1,PIDTAB+SP.GFR	;SENDING TO GOPHER?
	TXZN	S2,IP.CFV		;SENDING A PAGE TO THE GOPHER?
	JRST	SNDM.4			;NO, NOTHING SPECIAL
;**;[65] Replace 6 lines after SNDM.3+10L. /DPM
	IORX	S2,IP.CFL		;[65] YES, SET LARGE PACKET BIT
	HRRZ	P1,P2			;[65] GOPHER DOESN'T LIKE PAGES
	PG2ADR	P1			;[65] SO MAKE IT A LARGE PACKET
	LOAD	TF,.MSTYP(P1),MS.CNT	;[65] GET MESSAGE LENGTH
	HRL	P1,TF			;[65] MAKE IT LEN,,ADDR
	MOVEM	P1,SNDBLK+.IPCFP	;[65] SAVE IT AWAY
	MOVNI	P1,1			;[65] NOTE THAT WE FAKED A PAGE TO GOPHER
SNDM.4:	MOVEM	S2,SNDBLK+.IPCFL	;STORE SEND FLAGS

SNDM.5:	MOVE	S1,[IPCSLN,,SNDBLK]	;ARG FOR UUO
	IPCFS.	S1,			;SEND THE MESSAGE
	  JRST	SNDERR			;SEE WHY WE LOST

;Here if the send wins
	HLRZ	S1,P2			;GET DESIRED MESSAGE SIZE
	CAIE	S1,PAGSIZ		;WAS THE MESSAGE A PAGE?
	$RETT				;NO, ALL DONE!
	HRRZ	S1,P2			;GET THE ADRS OF THE PAGE
	SKIPN	P1			;WAS PAGE SENT AS A PACKET TO GOPHER?
	PUSHJ	P,M%IPSN##		;NO, NOTIFY MEMORY MANAGER OF PAGE SENT
	HRRZ	S1,P2			;GET PAGE NUMBER AGAIN
	PJRST	M%RELP##		;AND NOW SAY ITS OUT OF OUR ADRS SPACE

;SNDMSG CONTINUED ON NEXT PAGE

;SNDMSG CONTINUED FROM PREVIOUS PAGE

;HERE TO HANDLE SEND FAILURES WITH ERROR CODE IN S1

SNDERR:	CAXE	S1,IPE.SQ		;SENDER'S QUOTA FULL?
	CAXN	S1,IPE.RQ		;OR RECIEVER'S QUOTA FULL?
	 JRST	SNDE.1			;YES -- THEN TRY AGAIN
	CAXE	S1,IPE.SF		;FREE SPACE EXAUSTED?
	 JRST	SNDE.3			;NO -- THEN FAIL

;HERE TO HANDLE TRANSIENT SEND FAILURES

SNDE.1:	SOJL	P3,SNDE.2		;TIME TO GIVE UP?
	$SLEEP	RT.SLP			;WAIT FOR CONDITION TO CLEAR
	JRST	SNDM.5			;THEN TRY THE SEND AGAIN

SNDE.2:	CAXN	S1,IPE.SF		;NO SYSTEM FREE SPACE?
	 $RETE(SLE)			;YES -- SYSTEM LIMIT EXCEEDED
	CAXN	S1,IPE.RQ		;IS RECEIVER'S QUOTA FULL?
	 $RETE(RQF)			;YES -- RETURN ERROR
	CAXN	S1,IPE.SQ		;IS SENDER'S QUOTA FULL?
	 $RETE(SQF)			;YES -- RETURN ERROR
SNDE.3:	CAXE	S1,IPE.DU		;UNKNOWN DESTINATION?
	 $RETE(USE)			;NO -- UNEXPECTED SYSTEM ERROR
	SKIPL	P4			;YES -- WAS THERE A SYSTEM INDEX?
	SKIPN	PIDTAB(P4)		;YES -- WAS IT EVER THERE?
	$RETE(NSP)			;NO -- RETURN NO SUCH PID
	SETZM	PIDTAB(P4)		;YES -- REMEMBER IT'S GONE AWAY
	$RETE(PWA)			;RETURN PID-WENT-AWAY ERROR

SUBTTL	C%INTR - Interrupt level routine to flag message available

;Called to note the fact that an IPCF interrupt has occured

;CALL IS:	No arguments
;
;TRUE RETURN:	Always


C%INTR:	SETOM	MSGFLG			;FLAG THAT INTERRUPT HAS OCCURED
	MOVE	S1,@IPCINT		;GET ASSOCIATED VARIABLE
	SKIPN	IPCSTS			;ALREADY SETUP
	MOVEM	S1,IPCSTS		;NO..SET IT UP
	$RETT				;TAKE A GOOD RETURN

SUBTTL	C%RECV - Non-blocking IPCF receive

;C%RECV returns the next message from the IPCF queue or error ERNMA$
;	indicating that no messages are outstanding.
;
;CALL IS:	No arguments
;
;TRUE RETURN:	S1/ CONTAINS POINTER TO MDB (SEE GLXMAC)
;  OR
;FALSE RETURN:	S1/ CONTAINS ERROR CODE FOR FAILURE


C%RECV:	AOSE	MSGFLG			;IF FLAG SAYS THERE IS MESSAGE
	SKIPN	PSIFLG			; OR NO PSI CONNECTION
	SKIPA	S1,[IP.CFB]		;OK -- GET NON-BLOCKING FLAG
	$RETE(NMA)			;OTHERWISE, NO MESSAGE AVAILABLE
	IORM	S1,RCVFLG		;SET THE FLAG
	PJRST	RCVMSG			;AND GO DO THE WORK




SUBTTL	C%BRCV - Blocking IPCF Receive

;C%BRCV differs from C%RECV in that it never returns with the error
;	condition ERNMA$.  If no message is available, C%BRCV will block,
;	waiting for the next IPCF message.
;
;CALL IS:	No arguments
;
;TRUE RETURN:	S1/ CONTAINS POINTER TO MDB (SEE GLXMAC)
;  OR
;FALSE RETURN:	S1/ CONTAINS ERROR CODE (SEE GLXMAC)

C%BRCV:	MOVX	S1,IP.CFB		;GET NON BLOCKING FLAG
	ANDCAM	S1,RCVFLG		;CLEAR IT AND GO DO RECIEVE

SUBTTL	RCVMSG - Work routine to do an actual IPCF receive


RCVMSG:
IFN FTFLBK,<
	SKIPN	QUELOK			;IS THE IPCF QUEUE LOCKED ???
	SKIPN	S1,IPCQUE		;NO,,ANY INTERNAL QUEUE ???
	JRST	RCVM.A			;LOCKED OR NO QUEUE,,GET REAL MSG

	;Here to pick up an IPCF message off the internal queue

	PUSHJ	P,L%FIRST		;GET THE FIRST MSG ON THE QUEUE
	JUMPF	[MOVE  S1,IPCQUE	;NO MSGS,,GET THE ID BACK
		 SETZM IPCQUE		;CLEAR THE QUEUE ID
		 PUSHJ P,L%DLST		;DELETE THE QUEUE
		 JRST  RCVM.A	]	;AND GET A REAL MESSAGE
	SETOM	MSGFLG			;REMEMBER WE HAVE A PACKET
	MOVSS	S2			;GET MDB ADDRESS,,0
	HRRI	S2,RCVMDB		;GET MDB ADDRESS,,DESTINATION
	BLT	S2,RCVMDB+MDB.SZ-1	;COPY OVER TO PERMANENT MDB
	PUSHJ	P,L%DENT		;DELETE THE QUEUED MDB
	LOAD	S1,RCVMDB+MDB.MS,MD.CNT	;GET THE MESSAGE LENGTH
	CAXN	S1,PAGSIZ		;IS IT A PAGE ???
	JRST	RCVM.7			;YES,,RETURN TO THE USER
	LOAD	S2,RCVMDB+MDB.MS,MD.ADR	;GET THE PACKET ADDRESS
	PUSH	P,S2			;SAVE ITS ADDRESS
	MOVSS	S2			;GET PACKET ADDRESS,,0
	HRRI	S2,PACKET		;GET PACKET ADDRESS,,NEW ADDRESS
	BLT	S2,PACKET-1(S1)		;COPY IT OVER
	POP	P,S2			;GET THE ADDRESS BACK
	PUSHJ	P,M%RMEM		;DELETE THE QUEUED PACKET
	MOVEI	S1,PACKET		;GET THE NEW PACKET ADDRESS
	STORE	S1,RCVMDB+MDB.MS,MD.ADR	;AND SAVE IT
	JRST	RCVM.7			;RETURN TO THE USER
> ;END IFN FTFLBK

	;Here to recieve a real IPCF message

RCVM.A:	PUSHJ	P,.SAVE3		;GET SOME AC'S
	SETZ	S1,			;SETUP TO TEST/CLEAR IPCSTS
	EXCH	S1,IPCSTS		;GET STATUS WORD AND RESET
	SKIPN	S1			;ANYTHING SET?
	TXOA	S1,1			;NO -- SET A BIT FOR PAGE MODE
	LOAD	S1,S1,IP.CFV		;YES -- GET ACTUAL MODE
	STORE	S1,RCVFLG,IP.CFV	;STORE MODE FLAG
	JUMPE	S1,RCVM.1		;PACKET?
RCVM.0:	SKIPE	S1,RCVPAG		;NO -- DO WE HAVE A RECIVE PAGE?
	 JRST	RCVM.1			;YES -- NO NEED TO GET ONE
	PUSHJ	P,M%NXPG		;NO --GET A NON-EXISTENT PAGE
	JUMPF	[SETOM	MSGFLG		;OOPS -- CAN'T GET ONE
		 $RETE	(SLE)]		;RETURN ERROR
	HRLI	S1,PAGSIZ		;PLACE PAGE SIZE IN LEFT HALF
	MOVEM	S1,RCVPAG		;AND SAVE IT
RCVM.1:	MOVE	S1,RCVFLG		;GET FLAGS TO USE
	MOVEM	S1,RCVBLK+.IPCFL	;INIT RECIEVE BLOCK
	TXNE	S1,IP.CFV		;PAGE MODE?
	SKIPA	S2,RCVPAG		;YES -- GET PAGE TO USE
IFN FTFLBK,<
	JRST	[SKIPE	QUELOK		;NO -- CALL FROM SNDSYS?
		 SKIPA	S2,[MTLSIZ,,MTLBLK]	;YES -- POINT TO ITS BLOCK
>
		 MOVE	S2,[SZ.PAK,,PACKET]	;NO -- POINT TO PACKET
IFN FTFLBK,<
		 JRST	.+1]		;MERGE BACK INLINE
>
	MOVEM	S2,RCVBLK+.IPCFP	;SAVE PROPER POINTER
	MOVE	S1,MYPID		;RECIEVE ON MY BEHALF
	MOVEM	S1,RCVBLK+.IPCFR
	SETZM	RCVBLK+.IPCFS		;UNKNOWN SENDER -- UNTIL RECIEVE

RCVM.2:	MOVE	S1,[IPCRLN,,RCVBLK]	;UUO ARGUMENT
	IPCFR.	S1,			;DO THE RECEIVE
	  JRST	RCVM.3			;WE HAVE AN ERROR, GO ANALYZE IT
	SKIPE	S1			;ANY ASSOCIATED VARIABLE
	MOVEM	S1,IPCSTS		;YES..UPDATE THE STATUS
	LOAD	S2,RCVBLK+.IPCFU	;GET LOGGED IN PPN OF USER
	STORE	S2,RCVMDB+MDB.SD	;STORE IT
	STORE	S2,RCVMDB+MDB.CD	;ALSO USE IT AS CONNECTED DIRECTORY
	MOVE	S2,RCVBLK+.IPCFC	;GET CAPABILTIES WORD
	LOAD	P1,S2,IP.SJC		;GET SENDERS JCH
	STORE	P1,P1,MD.PJH		;STORE IT
	TXNE	S2,IP.JAC		;JACCT ON?
	TXO	P1,MD.PWH		;YES, TURN ON WHEEL
	TXNE	S2,IP.IPC		;IPCF PRIVS?
	TXO	P1,MD.PIP		;YES
	TXNE	S2,IP.POK		;POKE PRIVS?
	TXO	P1,MD.POK		;YES
	TXNE	S2,IP.JLG		;LOGGED IN?
	TXO	P1,MD.PLG		;YES
	TXNE	S2,IP.SXO		;SENDER EXECUTE-ONLY?
	TXO	P1,MD.PXO		;YES
	MOVE	S2,RCVBLK+.IPCFU	;GET PPN WORD
	CAMN	S2,OPRPPN		;IS HE THE OPERATOR?
	TXO	P1,MD.POP		;YES, SET OPERATOR
	CAMN	S2,MNTPPN		;HAVE MAINTANANCE PRIVS?
	TXO	P1,MD.PMT		;YES, SET THE PRIV
	LOAD	S1,P1,MD.PJB		;GET THE JOB NUMBER
	STORE	P1,RCVMDB+MDB.PV	;SAVE SENDERS PRIVILEGES
	SKIPN	NODPTR			;WANT THE LOCATED NODE RETURNED?
	PJRST	RCVM.5			;NO..PROCEED
	MOVX	S2,JI.LOC		;YES..GET THE INFO
	$CALL	I%JINF
	JUMPF	RCVM.5			;SORRY ABOUT THAT
	MOVE	S1,NODPTR		;GET THE POINTER
	$CALL	SIXASC			;STORE SIXBIT AS ASCIZ
	JRST	RCVM.5			;GO FINISH UP

; HERE TO WHEN IPCF RECIEVE FAILS
RCVM.3:	CAXN	S1,IPE.NM		;IS THIS "NO MESSAGE"?
	  $RETE	(NMA)			;YES -- RETURN
	CAXE	S1,IPE.WM		;CHECK FOR "WRONG MODE" ERROR
	  JRST	RCVM.4			;NOPE -- MUST BE REAL ERROR
	MOVX	S1,IP.CFV		;YES --GET PAGE MODE BIT
	XORB	S1,RCVFLG		;SWITCH MODES
	TXNE	S1,IP.CFV		;PAGE MODE
	JRST	RCVM.0			;YES -- GO GET IT RIGHT
	JRST	RCVM.1			;NO -- GO GET A PACKET

RCVM.4:	CAXE	S1,IPE.NR		;CHECK FOR "NO ROOM" (TOPS-10)
	$STOP(IRF,IPCF Reception failure)
	PUSHJ	P,M%IPRM		;TRY TO MAKE SOME ROOM
	JUMPT	RCVM.1			;TRY AGAIN
	$RETE	(NPI)			;?NO FREE PAGES FOR IPCF RECEPTION

;HERE ON A SUCCESSFUL RECEIVE

RCVM.5:	SKIPE	IPCSTS			;MORE MESSAGES IN QUEUE?
	SETOM	MSGFLG			;YES -- SET MSG AVAILABLE FLAG
	LOAD	S1,RCVBLK+.IPCFL	;GET FLAGS
	STORE	S1,RCVMDB+MDB.FG	;STORE INTO MDB
	TXNE	S1,IP.CFV		;DID WE RECIVE A PAGE?
	SETZM	RCVPAG			;YES -- CLEAR OUR PAGE
	LOAD	S1,RCVBLK+.IPCFP	;GET LENGTH AND ADDRESS OF DATA
	STORE	S1,RCVMDB+MDB.MS	;STORE INTO MDB
	LOAD	S1,RCVBLK+.IPCFR	;GET RECEIVER'S PID
	STORE	S1,RCVMDB+MDB.RP	;STORE IT TOO
	LOAD	S1,RCVBLK+.IPCFS	;GET PID OF SENDER
	STORE	S1,RCVMDB+MDB.SP	;STORE AS SENDER'S PID
	SETZM	RCVMDB+MDB.SI		;ASSUME NOT A SYSTEM PID
	PUSHJ	P,C%SIDX		;SEE IF A SYSTEM PID
	 JUMPF	RCVM.6			;NO -- GIVE UP
	TXO	S1,SI.FLG		;YES -- SET SPECIAL INDEX FLAG
	MOVEM	S1,RCVMDB+MDB.SI	;STORE INTO INDEX WORD
	MOVX	S1,MD.POP		;SET OPERATOR CAPABILITY
	SKIPE	DEBUGW			;DEBUGGING?
	IORM	S1,RCVMDB+MDB.PV	;YES..SET THE CAPABILITY
RCVM.6:	LOAD	S1,RCVMDB+MDB.MS,MD.CNT	;GET SIZE OF MESSAGE
	CAXE	S1,PAGSIZ		;IF NOT A PAGE
	JRST	RCVM.7			;RETURN NOW
	LOAD	S1,RCVMDB+MDB.MS,MD.ADR	;GET PAGE NUMBER
	PUSHJ	P,M%IPRC		;NOTIFY THAT IT IS IN NOW
	LOAD	S1,RCVMDB+MDB.MS,MD.ADR	;GET PAGE NUMBER FROM MDB
	PG2ADR	S1			;CONVERT IT TO AN ADDRESS
	STORE	S1,RCVMDB+MDB.MS,MD.ADR	;STORE IT BACK INTO MDB
RCVM.7:	MOVEI	S1,RCVMDB		;GET POINTER TO MDB AND TAKE
	$RETT				;GENERATE A GOOD RETURN

SUBTTL	C%SIDX - See if PID in S1 is a system PID

;CALL:	S1/ A PID
;	PUSHJ	P,C%SIDX
;
;RETURN FALSE IF NO SYSTEM INDEX FOUND TO MATCH
;RETURN TRUE WITH S1/ SYSTEM INDEX THAT MATCHED

C%SIDX:	SKIPN	DEBUGW			;IF NOT DEBUGGING,
IFN FTFLBK,<
	SKIPE	OLDMON			;AND THE IPCFM. UUO IS PRESENT,
	 TRNA				;NO, FLUNK
>
	JRST	SIDX.4			;YES, JUST ASK IPCC
	PUSHJ	P,.SAVE2##		;NO, SAVE WORK ACS
	MOVE	P2,S1			;PRESERVE THE PID IN QUESTION
	MOVSI	P1,-SZ.PID		;AOBJN WORD
SIDX.1:
IFE FTFLBK,<
	SKIPE	S1,PIDTAB(P1)		;DO WE KNOW A PID FOR THIS INDEX?
>
IFN FTFLBK,<
	SKIPN	S1,PIDTAB(P1)		;DO WE KNOW A PID FOR THIS INDEX?
	SKIPE	QUELOK			;NO -- CAN WE ASK ABOUT IT?
>
	JRST	SIDX.2			;NO OR KNOWN -- DON'T ASK AGAIN
	HRRZ	S1,P1			;UNKNOWN -- GET INDEX WHERE WE NEED IT
	PUSHJ	P,RSPID			;TRY TO FIND IT
	JUMPF	SIDX.3			;CAN'T TELL ABOUT THIS ONE
SIDX.2:	CAME	S1,P2			;DOES IT MATCH OURS?
SIDX.3:	AOBJN	P1,SIDX.1		;NO -- LOOK SOME MORE
	JUMPGE	P1,.RETF		;NO MATCH AT ALL, FAIL
	HRRZ	S1,P1			;ISOLATE INDEX IN RETURN AC
	$RETT				;RETURN GOODNESS

SIDX.4:	MOVEM	S1,MTLBLK+.IPCS1	;SAVE ARGUMENT TO IPCC FUNCTION
	MOVE	S1,[3,,.IPCLP]		;LENGTH,,FUNCTION TO LOCATE SYSTEM PID
	PUSHJ	P,SNDIPC		;HAVE IPCC LOCATE IT
	MOVE	S1,MTLBLK+.IPCS2	;GET THE PID INDEX RETURNED
	POPJ	P,			;PROPAGATE TF VALUE

SUBTTL C%REL  - Release the last message received

; C%REL is used to release the last message received via C%RECV or C%BRCV.
;If this message is a packet, then this is a null operation, and if its
;a page, the page is released.

;CALL IS:	No arguments
;
;TRUE RETURN:	Always

C%REL:	SKIPN	S2,RCVMDB+MDB.MS	;GET SIZE AND ADDRESS OF MESSAGE
	$STOP(RAR,Releasing already released IPCF message) ;ALREADY RELEASED
	SETZM	RCVMDB+MDB.MS		;MARK MESSAGE AS RELEASED
	LOAD	S1,S2,MD.CNT		;GET SIZE OF MESSAGE
	CAXE	S1,PAGSIZ		;IS THIS MESSAGE A PAGE?
	$RETT				;NO, SO RETURN NOW
	LOAD	S1,S2,MD.ADR		;GET ADDRESS OF MESSAGE
	ADR2PG	S1			;GET THE PAGE NUMBER
	PJRST	M%RELP			;RETURN AFTER RELEASING THE PAGE


SUBTTL	C%RPRM	Routine to read IPCF Parameters

;C%RPRM IS USED TO  EXAMINE THE MOST COMMONLY NEEDED
;IPCF PARAMETERS.  THESE INCLUDE THE TOTAL NUMBER OF PIDS AND THE 
;IPCF RECEPTION / SEND QUOTAS.

;CALL IS:	S1/ -1 TO READ PARAMETERS OF PID QUOTA, SND,RCV QUOTAS
;			OR ELSE AN SP.??? SYMBOL TO RETURN THAT ENTRY FROM
;			THE PID TABLE
;
;TRUE RETURN:	IF THE INFORMATION IS AVAILABLE
;		S1/<MAX PIDS>B17+<SND QUOTA>B26+<RCV QUOTA>B35 ;IF S1=-1
;		S1/ PID TABLE ENTRY ; IF S1=0 OR +

C%RPRM:	JUMPGE	S1,RSPID		;IF NON-ZERO, WANT SYSTEM PID
	SETZ	S1,			;SET TO READ IPCF PARAMETERS
	PJRST	IPRM			;GO READ PARAMS AND RETURN

SUBTTL GETPID - Acquire a PID for this job


;CALL IS:	First, Call SETNAM to setup name (if any)
;		S1 - 1 means set JWP
;
;TRUE RETURN:	S1/ PID acquired for this job

GETPID:	$SAVE	<P1,P2,MYPID>		;Save some regs
	PJOB	S2,			;Get our job number
	MOVX	TF,IB.DPM		;GET A BIT
	TDNE	TF,IIB##+IB.FLG		;USE JOB NUMBER AS PID ?
	JRST	GETP.1			;YES - THIS MAKES LIFE EASY FOR US
	MOVEM	S2,MYPID		;Save as our (temporary) PID
	SKIPN	P2,S1			;Want JWP?
	TXO	S2,1B0			;NO -- MAKE PID TEMPORARY
	MOVEM	S2,MTLBLK+.IPCI1	;ARGUMENT
	SETO	P1,			;Set 'named PID flag'
	SKIPE	MTLBLK+.IPCI2		;Is a name desired?
	JRST	GETP.3			;Yes, must go thru INFO
	SETZ	P1,			;Clear 'named PID flag'
	MOVE	S1,[XWD 3,.IPCSC]	;FUNCTION IS MAKE PID
	PUSHJ	P,SNDIPC		;ASK IPCC TO DO IT
	JUMPF	GETP.2			;Failed, maybe no privs, try INFO
	MOVE	S1,MTLBLK+.IPCS2	;GET PID RETURNED BY IPCC
	$RETT				;RETURN

; Here to use our job number for a PID
GETP.1:	MOVE	S1,S2			;GET JOB NUMBER
	$RETT				;RETURN

;Here to ask INFO for a PID (perhaps named)
GETP.2:	SETZ	S2,			;Indicate no name desired
	PUSHJ	P,SETNAM		;Set up the PACKET
GETP.3:	MOVE	S1,[XWD C%INIT,.IPCII]	;Function to make a named PID, till RESET
	SKIPE	P2			;Want to be job-wide?
	MOVE	S1,[XWD C%INIT,.IPCIJ]	;Function to make a named PID, job wide
	PUSHJ	P,SNDINF		;ASK INFO TO DO IT
	$RETIF				;PROPAGATE FAILURE
	MOVE	S1,MTLBLK+.IPCI1	;Get the PID returned by INFO
	SKIPN	P1			;Did we get a name?
	$RETT				;Give that back
	SKIPE	DEBUGW			;ARE WE DEBUGGING?
	$WARN	<^I/NAMMSG/>		;Type the name we're getting
	$RETT				;AND RETURN

;An ITEXT to print out the debugging name
NAMMSG:	ITEXT	<Becoming  ^T20/MTLBLK+.IPCI2/ (PID = ^O/S1/)>

SUBTTL	KILPID	Routine to delete a pid

;KILL PID IS CALLED DURING INITIALIZATION TO RETURN ANY PID ACQUIRED
;THAT WE NO LONGER NEED.
;Tops10 Alternate entry at KILPDN, to kill a PID via INFO, since
;	the PID to be killed is known to be named

;CALL		S1/ Pid to be killed

;TRUE RETURN:	Pid has been killed

;FALSE RETURN:	Pid wasn't killed

KILPID:	MOVEM	S1,MTLBLK+.IPCI1	;SAVE PID TO BE KILLED
	MOVE	S1,[2,,.IPCSZ]		;CODE,,DELETE PID FUNCTION
	PUSHJ	P,SNDIPC		;ASK IPCC TO DO IT
	$RETIT				;RETURN IF ALL SET
	MOVE	S1,MTLBLK+.IPCI1	;Get back PID which should have gone
KILPDN:	MOVEM	S1,MTLBLK+.IPCI2	;Save PID in message to INFO
	SETZM	STACL			;'NAME' FIT JUST FINE, THANK YOU
	MOVE	S1,[KILPID,,.IPCID]	;IPCC won't listen, probably no privs
	PJRST	SNDINF			;TRY INFO, PROPAGATE RETURN

SUBTTL SPID   - Set a system PID

;SPID sets a system wide pid in the internal pid table and in the
;monitor pid table if not debugging.

;CALL IS:	S1/ Index into the system pid table
;		S2/ Pid to store in system Pid Table
;
;TRUE RETURN:	Pid stored in internal and system pid table
;		(if Debugging -- pid is stored in internal table only)

SPID:	CAIL	S1,1			;MUST BE 1 THRU SZ.PID
	CAXL	S1,SZ.PID		;INDEX IN RANGE?
	 $STOP	(PIR,PID Index out of range)
	CAMN	S2,PIDTAB(S1)		;IS REQUESTED INDEX ALREADY SET?
	$RETT				;YES, NO NEED TO SET IT AGAIN
	MOVEM	S2,PIDTAB(S1)		;STORE MYPID IN INTERNAL TABLE
IFN FTFLBK,<
	SKIPN	NEWSID			;FAKING A SYSTEM PID?
>
	SKIPE	DEBUGW			;DEBUGGING?
	$RETT				;YES -- DON'T TELL THE MONITOR
	MOVEM	S1,MTLBLK+.IPCS1	;STORE FIRST WORD, THE INDEX
	MOVEM	S2,MTLBLK+.IPCS2	;STORE PID TO SET
	MOVE	S1,[XWD 3,.IPCWP]	;FUNCTION IS SET SYSTEM PID
	PUSHJ	P,SNDIPC		;ASK IPCC TO DO IT
	$RETIT				;RETURN ALL OK IF WE ARE IN GOOD SHAPE
	 $FATAL	<Can't write System PID table>

SUBTTL	RSPIDS	Routine to read System Pid tables

;RSPIDS is called from initialization to set up our internal System
;pid table.  It requests all system pids from the monitor or from
;INFO if the pid has a name.  If a Pid exists, it's entry in PIDTAB
;will be non-zero.
;RSPIDS is usually called only during intialization.  It gets a PID for us,
;reads all the PIDS, then destroys the PID
;For hacking around, the ALTNAM table can be twiddled, and
;a debugger can do PUSHJ P,RSPIDS to set up some different PIDs

;CALL		No Arguments

;TRUE RETURN	PIDTAB Contains all valid system pids

RSPIDS:	$SAVE	<P1>			;PRESERVE P1
	MOVE	S1,[XWD PIDTAB,PIDTAB+1] ;Make BLT pointer
	SETZM	PIDTAB			;To clear all the PIDs
	BLT	S1,PIDTAB+MX.PID	;Clear it
IFN FTFLBK,<
	MOVX	S2,SP.INF		;GET SYSINF INDEX
	SKIPE	OLDMON			;OLD MONITOR?
	PUSHJ	P,RSPI.1		;YES, FIND AND SAVE INFO'S PID
>
	PJOB	S1,			;-10, just use job # as PID
	PUSH	P,MYPID			;Save whatever is there now
	MOVEM	S1,MYPID		;Save as ours, for now
	MOVSI	P1,-SZ.PID		;DO ALL ENTRIES

RSPD.1:	HRRZ	S1,P1			;LOAD THE INDEX
	PUSHJ	P,RSPID			;GET THE PID
	JUMPF	[CAIE S1,ERARG$		;INVALID INDEX?
		 TDZA S1,S1		;NO -- MUST BE NO SUCH PID
		 SETO S1,		;YES -- MARK INVALID ENTRY
		 JRST .+1]		;RETURN IN LINE
	MOVEM	S1,PIDTAB(P1)		;STORE THE ENTRY
RSPD.2:	AOBJN	P1,RSPD.1		;LOOP THRU ALL ENTRIES

	POP	P,MYPID			;Put back the old one
	$RETT				;AND RETURN

	SUBTTL	RSPID Routine to return a system pid

;RSPID is called to return system PID when sending by special index.
;If the Pid is not found in our internal table, we request the Pid
;from the monitor (or from INFO if we are debugging and the System
;index has a name.)
;The PID is obtained from the system table unless
; 1) - the DEBUGW is set
;   and ALTNAM(index) contains an address of a string
;or
; 2) - the DEBUGW is set
;   and ALTNAM(index) = 0 (no fooling around), and SPDNAM has a SIXBIT
;		library convention debug name.
;Under normal debug, ALTNAM is 0.
;To fool around, put a -1 in an entry to talk to system component, or
;  put the address of a string which is the name of the PID you want to talk to.

;CALL IS:	S1/ Index into System PID table
;
;TRUE RETURN:	S1/ PID for that index

;FALSE RETURN:	ERARG$		Invalid index
;		ERNSP$		No Such Pid
;		ERPWA$		PID went away

RSPID:	MOVE	S2,S1			;GET THE INDEX
	SKIPN	DEBUGW			;Are we debugging?
	JRST	RSPI.1			;No, never use names
RSPI.0:	CAIL	S2,0			;INDEX VALID?
	CAIL	S2,SZ.PID
	 $RETE(ARG)			;NO -- FAIL
	SKIPE	S1,PIDTAB(S2)		;DO WE KNOW THIS PID?
	$RETT				;YES, RETURN IT

	SKIPGE	S1,ALTNAM(S2)		;Force use of system for this component?
	JRST	RSPI.1			;Yes, go thru system table
	JUMPN	S1,RSPI.3		;If an addr was in there, use that name
	SKIPE	S1,SPDNAM(S2)		;0 in ALTNAM, is there a library entry?
	JRST	RSPI.3			;Yes, use library convention
IFN FTFLBK,<
	SKIPN	DEBUGW			;ARE WE HERE FOR FALLBACK REASONS?
	 JRST	RSPI.2			;YES, ASSUME NO SUCH PID
>
	;Here to get PID from system table
RSPI.1:	MOVEI	S1,.GTSID		;NO -- ASK THE MONITOR
	HRL	S1,S2			;LOAD THE INDEX
	GETTAB	S1,			;GET THE ENTRY
	  JRST	RSPI.8			;INVALID INDEX
	JUMPE	S1,RSPI.2		;IS IT THERE?
	SKIPL	S2			;RANGE CHECK
	CAILE	S2,MX.PID		;AGAINST OUR TABLE
	$RETT				;DON'T STORE OUTSIDE OF TABLE
	MOVEM	S1,PIDTAB(S2)		;YES, REMEMBER THAT IT EXISTED ONCE
	$RETT				;RETURN GOODNESS

	;Here to see if it went away after we had known it once
RSPI.2:	SKIPN	PIDTAB(S2)		;DID WE EVER KNOW IT?
	 $RETE(NSP)			;NO -- RETURN NO SUCH PID
	$RETE(PWA)			;YES -- RETURN PID WENT AWAY

	;Here to check invalid index
RSPI.8:
IFN FTFLBK,<
	CAILE	S2,SP.GFR		;IN 7.02 RANGE?
	SKIPN	OLDMON			;OR NOT 7.02?
>
	$RETE(ARG)			;YES, GIVE INVALID ARGUMENT ERROR
IFN FTFLBK,<
	JRST	RSPI.0			;NO, CHECK WITH INFO
>
	
	;RSPIDS is continued on the next page

	;RSPIDS continued from previous page

	;Here to find a system component thru INFO
	;Enter with S1/addr of ASCIZ name (LH of S1 = 0)
	;	or S1/SIXBIT debug name (LH of S1 .NE. 0)
	;	S2/ special system index

RSPI.3:	$SAVE	<P1>			;PRESERVE P1
	MOVE	P1,S2			;SAVE THE INDEX
	MOVEI	S2,NAMTXT		;Assume library convention
IFN FTFLBK,<
	SKIPN	DEBUGW			;ARE WE HERE FOR FALLBACK REASONS?
	MOVEI	S2,SYSTXT		;YES, ASSUME SYSTEM CONVENTION
>
	TLNN	S1,-1			;Is S1 SIXBIT?
	MOVEI	S2,[ITEXT (<^T/(S1)/>)]	;No, use different arg
	PUSHJ	P,FNDNAM		;ASK INFO FOR THE PID
	MOVE	S2,P1			;RESTORE THE INDEX
	JUMPF	.POPJ			;RETURN ERROR FROM FNDNAM
RSPI.4:	MOVEM	S1,PIDTAB(S2)		;STORE THE PID
	$RETT

	SUBTTL C%MAXP  - Read maximum short packet size

;CALL IS:	No arguments
;
;TRUE RETURN:	S1/ Largest size of short IPCF message

C%MAXP:	MOVX	S1,%IPCML		;ASK MONITOR FOR IT
	GETTAB	S1,			;
	  MOVEI	S1,-1			;WILL TAKE "TOO LARGE" FAILURE
	$RETT				;RETURN

SUBTTL CPIDI  - Connect PID to specified interrupt channel

;This routine connects the PID acquired
;to the specified interrupt channel.

;CALL IS:	S1/ Channel to connect PID to
;		S2 / PID to connect
;		TOPS10, IIB is used to setup internal intrpt connection
;TRUE RETURN:	Always

CPIDI:	HRLZM	S1,MTLBLK+1		;STORE OFFSET,,0
	PUSH	P,S1			;Save offset
	MOVX	S1,.PCIPC		;REASON IS IPCF RECEPTION
	MOVEM	S1,MTLBLK+0		;STORE IT
	SETZM	MTLBLK+2		;CLEAR PRIORITY LEVEL
	MOVE	S1,[PS.FAC+MTLBLK]	;ADD THE CONDITION
	PISYS.	S1,			;ADD IT
	  $STOP(IIF,IPCF to interrupt system connect failed)
	LOAD	S1,IIB##+IB.INT		;ADDRESS OF INTERRUPT VECTOR
	POP	P,S2			;GET VECTOR OFFSET FOR IPCF
	ADDI	S1,.PSVIS(S2)		;GET ADDRESS OF ASSOCIATED VARIABLE
	MOVEM	S1,IPCINT		;SAVE ADDRESS FOR C%INTR
	$RETT				;RETURN

SUBTTL	IPRM Read/Write IPCF parameters



;CALL IS:	S1 / -1 TO WRITE,   0 TO READ PARAMETERS
;		S2 / PARAMETERS TO WRITE (IF S1=-1)
;
;TRUE RETURN:	S1 / <MAX PIDS>B17+<SND QUOTA>B26+<RCV QUOTA>B35 ;IF S1=0

IPRM:	PUSHJ	P,.SAVE1		;GET ONE AC
	MOVE	P1,S2			;REMEMBER 2ND ARG
	JUMPE	S1,IPRM.2		;IF READING, SKIP THIS
	HLRZ	S1,S2			;GET THE PID MAX WANTED
	JUMPE	S1,IPRM.1		;IF DEFAULTED, SKIP THIS
	PUSHJ	P,MNPRED		;GET THE CURRENT MAXIMUM
	HLRZ	S2,P1			;GET THE REQUESTED NUMBER
	ADD	S1,S2			;ADD TO CURRENT AMOUNT
	CAIL	S1,1000			;MAXIMUM IN RANGE
	MOVEI	S1,777			;NO..SET TO MAXIMUM
	PUSHJ	P,MNPWRT		;WRITE MAXIMUM NUMBER OF PIDS
	SKIPT				;OK?
	 $FATAL <IPCF privileges required to set maximum number of pids>

IPRM.1:	HRRZ	S1,P1			;GET THE QUOTAS
	JUMPE	S1,.RETT		;IF DEFAULTING, LEAVE IT ALONE

	LOAD	S1,P1,IP.SQT		;GET THE QUOTAS

	CAIL	S1,1000			;MAXIMUM IN RANGE
	MOVEI	S1,777			;NO..SET TO MAXIMUM
	STORE	S1,P1,IP.SQT		;SAVE THE VALUES
	HRRZ	S1,P1			;GET THE QUOTAS AGAIN
	PUSHJ	P,QTAWRT		;WRITE QUOTAS OUT
	JUMPT	.RETT			;IF ALL OK, RETURN NOW
	 $FATAL <IPCF privileges required to set IPCF quotas>

IPRM.2:	PUSHJ	P,MNPRED		;READ MAXIMUM NUMBER OF PIDS
	MOVE	P1,S1			;REMEMBER THE ANSWER
	PUSHJ	P,QTARED		;AND THE QUOTA'S
	SKIPT				;DID WE GET IT?
	$FATAL	<Can't read IPCF quotas>
	HRLM	P1,S1			;MAKE UP THE TWO HALVES
	$RETT				;AND RETURN

SUBTTL MNPRED/MNPWRT - Read/Write maximum number of PIDS

;THESE ROUTINES DO THE SYSTEM DEPENDENT WORK FOR SETTING THE MAXIMUM
;NUMBER OF PIDS FOR A JOB. 
;
; CALL IS:	READ/NO ARGUMENTS  WRITE/S1 MAXIMUM NUMBER OF PIDS
;TRUE RETURN:	READ/S1 MAX NR. OF PIDS	WRITE/NO RETURNED VALUE
;FALSE RETURN:	FAILURE OF SOME SORT


MNPRED:	SKIPA	S2,[3,,.IPCQR]		;READ QUOTA
MNPWRT:	MOVE	S2,[3,,.IPCQS]		;WRITE QUOTA
IFN FTFLBK,<
	SKIPN	OLDMON			;DOES THIS MONITOR HAVE PID QUOTAS?
>
	PJRST	QTARWT			;JOIN COMMON QUOTA READ/WRITE CODE
IFN FTFLBK,<
	MOVEI	S1,777			;NO, RETURN A LARGE NUMBER FOR READS
	$RETT				;PRETEND IT WORKS
>

SUBTTL QTARED/QTAWRT - Read/Write the Send and Receive Quotas

;CALL IS:	S1/ 0,,<SND QUOTA>B26+<RCV QUOTA>B35 IF WRITING
;TRUE RETURN:	S1/ 0,,<SND QUOTA>B26+<RCV QUOTA>B35 IF READING
;FALSE RETURN:	ON ANY FAILURE OF TASK


QTARED:	SKIPA	S2,[3,,.IPCSR]		;READ QUOTAS
QTAWRT:	MOVE	S2,[3,,.IPCSQ]		;WRITE QUOTAS

;JOIN HERE FROM MNPRED/MNPWRT, ABOVE

QTARWT:	MOVEM	S1,MTLBLK+.IPCS2	;STORE QUOTA FOR WRITE
	MOVE	S1,MYJOB##		;GET OUR JOB NUMBER
	MOVEM	S1,MTLBLK+.IPCS1	;STORE IT AWAY 
	MOVE	S1,S2			;GET XWD CODE,FUNCTION IN RIGHT AC
	PUSHJ	P,SNDIPC		;ASK IPCC TO DO IT
	MOVE	S1,MTLBLK+.IPCS2	;GET RESPONSE
	POPJ	P,			;PROPAGATE TF VALUE

SUBTTL SETNAM - Routine to declare our name to INFO

;SETNAM is used to setup the name in the packet about to go to INFO or IPCC
;This allows programs to communicate
; by other means than the system PID table.  This is useful for debugging
; purposes when multiple components are going to be used.
;SETNAM should always be called just before calling GETPID

;CALL:		S2/ Addr of ITEXT of name to write
;		 or 0, to set up no name
;
;TRUE RETURN:	Always, name has been established
;		2 nd  word of PACKET has 0 or name,
;		  STACP has incremented pointer


SETNAM:	SETZM	MTLBLK+.IPCI2		;CLEAR NAME FROM MESSAGE
	SETZM	MTLBLK+MTLSIZ-1		;MAKE SURE IS ALWAYS ASCIZ
	PUSH	P,S2			;SAVE NAME POINTER A MOMENT
	MOVE	S2,[POINT 7,MTLBLK+.IPCI2] ;GET POINTER TO MESSAGE AREA
	MOVEM	S2,STACP		;STORE THAT POINTER
	MOVEI	S2,SZ.INF		;GET MAXIMUM NAME LENGTH
	MOVEM	S2,STACL		;STORE IN LIMIT WORD
	POP	P,S2			;RESTORE NAME POINTER
	JUMPE	S2,.RETT		;IF NO NAME DESIRED, WE'RE DONE
	$TEXT(STAC,<^I/(S2)/^0>)	;CREATE THE NAME
	$RETT				;RETURN SUCCESS


;FNDNAM is used to ask INFO for the pid of a specified name
;  It is called by GETPID to look for our name and by RSPIDX
;  to check for Private Quasar and Private Orion

;CALL:		S2/ addr of ITEXT to build name

;TRUE RETURN:	S1/ Pid of Specified Name

FNDNAM:	PUSHJ	P,SETNAM		;Set up name in message
	MOVE	S1,[XWD FNDNAM,.IPCIW]	;FUNCTION IS FIND PID FOR NAME
	PUSHJ	P,SNDINF		;ASK INFO
	 JUMPF	[$RETE(NSP)]		;RETURN NO SUCH PID
	MOVE	S1,MTLBLK+.IPCI1	;GET THE PID
	SKIPE	DEBUGW			;DEBUGGING ?
	$WARN	<Alternate ^T20/MTLBLK+.IPCI2/ (PID = ^O/S1/)> ;SHOW THE NAME
	$RETT				;RETURN SUCCESS

SUBTTL	SNDINF/SNDIPC - Routines to converse with [SYSTEM]INFO & IPCC

;SNDINF is used to carry on an IPCFM. dialog with [SYSTEM]INFO

;CALL IS:	S1/ CODE WORD TO USER, I.E., ID,,FUNCTION CODE
;
;TRUE RETURN:	If UUO succeeds
;
;FALSE RETURN:	If it fails
;
;SNDSYS will be used instead if IPCFM. UUO support is missing

SNDINF:	SKIPGE	STACL				;DID THE NAME FIT?
	$RETF					;NO, GIVE UP NOW
	MOVEM	S1,MTLBLK+.IPCI0		;SAVE FUNCTION WORD IN ARG BLOCK
	SETZM	MTLBLK+.IPCI1			;NO ONE IS TO BE COPIED
IFN FTFLBK,<
	SKIPE	OLDMON				;IS THE IPCFM. UUO PRESENT?
	JRST	[MOVEI	S2,SP.INF		;NO, TELL SNDSYS TO USE INFO
		 PJRST	SNDSYS]			;AND LET IT DO THE WORK
>
	HRRZ	S1,STACP			;LAST WORD USED BY SETNAM
	SUBI	S1,MTLBLK-1			;FORM LENGTH OF BLOCK
	HRLM	S1,MTLBLK			;SAVE FOR UUO
	$SAVE	<P1>				;SAVE A REG
	MOVEI	P1,RT.SCL			;LOAD RETRY LIMIT
SINF.1:	XMOVEI	S1,[IP.CMP!<0,,2>		;INVOKING PRIVS, TALK TO INFO
		    IFIW MTLBLK]		;POINT TO UUO ARG BLOCK
	IPCFM.	S1,				;TALK TO [SYSTEM]INFO
	  JRST	SINF.2				;ANALYZE FAILURE
	$RETT					;PROPAGATE SUCCESS

SINF.2:	CAIE	S1,IPCDU%			;UNKNOWN DESTINATION?
	 $RETF					;NO, JUST FAIL
	SKIPE	DEBUGW				;IF DEBUGGING,
	CAIE	P1,RT.SCL			;AND FIRST TIME TO WAIT,
	 JRST	SINF.3				; (NO, SKIP IT)
	MOVE	S1,SPDNAM+SP.INF		;GET POINTER WHERE REQUIRED
	$WARN	<Waiting for ^I/SYSTXT/ to start> ;SAY WHY WE PAUSED
SINF.3:	SOJL	P1,.RETF			;FAIL IF RETRIES DONE
	$SLEEP	RT.SLP				;ELSE WAIT A LITTLE FOR IT
	JRST	SINF.1				;AND TRY AGAIN


;SNDIPC is used to carry on an IPCFM. dialog with [SYSTEM]IPCC

;CALL IS:	S1/ CODE WORD TO USE, I.E., LEN,,FUNCTION CODE
;
;TRUE RETURN:	If UUO succeeds
;
;FALSE RETURN:	If it fails
;
;SNDSYS will be used instead if IPCFM. UUO support is missing

SNDIPC:
IFN FTFLBK,<
	SKIPN	OLDMON				;IS THE IPCFM. UUO PRESENT?
	JRST	SNDI.1				;YES, USE IT
	HLRZ	S2,S1				;NO, GET THE LENGTH
	ADDI	S2,MTLBLK-1			;POINT TO LAST WORD OF PACKET
	MOVEM	S2,STACP			;SAVE FOR SNDSYS
	HRL	S1,(P)				;MAKE RETURN ADDRESS BE ACK CODE
	MOVEM	S1,MTLBLK+.IPCS0		;SAVE FUNCTION WORD FOR SNDSYS
	MOVEI	S2,SP.IPC			;TELL SNDSYS TO USE IPCC
	PJRST	SNDSYS				;HAVE IT DO THE WORK
SNDI.1: > ;END OF IFN FTFLBK
	MOVEM	S1,MTLBLK+.IPCS0		;SAVE LEN,,FUNCTION FOR UUO
	XMOVEI	S1,[IP.CMP!<.IPCCC,,2>		;INVOKING PRIVS, TALK TO IPCC
		    IFIW MTLBLK]		;POINT TO UUO ARG BLOCK
	IPCFM.	S1,				;TALK TO [SYSTEM]IPCC
	  $RETF					;PROPAGATE FAILURE
	$RETT					;AND SUCCESS

SUBTTL SNDSYS - Routine to converse with [SYSTEM]INFO & IPCC


;SNDSYS is used to carry on a SEND-RECEIVE dialog with the system
; IPCF facilities

;CALL IS:	S1/ CODE WORD TO USE, I.E. ID,,FUNCTION CODE
;		S2/ CANONICAL SYSTEM INDEX TO SEND TO, EITHER SP.IPC OR SP.INF
;
;TRUE RETURN:	If acknowledgement comes back successfully
;
;FALSE RETURN:	If for any reason we cannot sent, or the
;		response contains an error.
;
;THIS ROUTINE IS USED ONLY WHEN THE MONITOR DOES NOT SUPPORT THE IPCFM. UUO

IFN FTFLBK,<
SNDSYS:	$SAVE	<P1,P2,SNDFLG,RCVMDB+MDB.MS,RCVMDB+MDB.FG,RCVMDB+MDB.SD,RCVMDB+MDB.CD,RCVMDB+MDB.SP,RCVMDB+MDB.RP,RCVMDB+MDB.PV,RCVMDB+MDB.SI,RSEFLG>
					;PRESERVE WHAT WE TOUCH
	DMOVE	P1,S1			;SAVE INPUT ARGUMENTS
	SETZM	RSEFLG			;ALWAYS WAIT FOR SYSINF TO START UP
	SETOM	QUELOK			;LOCK THE INTERNAL IPCF QUEUE
	MOVEI	S1,MTLBLK		;GET LOCATION OF PACKET
	MOVEM	S1,SNDSAB+SAB.MS	;STORE MESSAGE LOCATION
	HRRZ	S1,STACP		;LAST WORD USED BY SETNAM
	SUBI	S1,MTLBLK-1		;COMPUTE SIZE
	MOVEM	S1,SNDSAB+SAB.LN	;STORE AS MESSAGE LENGTH
	ZERO	SNDSAB+SAB.PD		;SEND IS BY INDEX, NOT PID
	ZERO	SNDSAB+SAB.SI		;CLEAR OUT INDEX WORD
	STORE	P2,SNDSAB+SAB.SI,SI.IDX	;SET INDEX
	MOVEI	S1,1			;GET A BIT
	STORE	S1,SNDSAB+SAB.SI,SI.FLG	;LIGHT BY-INDEX FLAG

	;SNDSYS CONTINUED ON NEXT PAGE

	;SNDSYS CONTINUED FROM PREVIOUS PAGE (STILL IN FTFLBK CONDITIONAL)

	MOVEI	S1,SAB.SZ		;SIZE OF SAB
	MOVEI	S2,SNDSAB		;AND ITS LOCATION
	PUSHJ	P,C%SEND		;SEND IT OFF
	SKIPF				;SKIP IF FAILED !!!
SNDS.2:	PUSHJ	P,C%BRCV		;DO A WAITING RECEIVE NOW
	JUMPF	[SETZM QUELOK		;FAILED,,CLEAR IPCF QUEUE LOCK
		 $RETF ]		;AND RETURN
	MOVE	S1,RCVMDB+MDB.SI	;GET SPECIAL INDEX WORD
	TXNN	S1,SI.FLG		;FROM A 'SPECIAL' PID ???
	JRST	SNDS.3			;NO,,TRY ANOTHER MESSAGE
	LOAD	S1,S1,SI.IDX		;GET THE SPECIAL PID INDEX
	CAME	S1,P2			;REPLY FROM DESTINATION?
	JRST	SNDS.3			;NO, TRY AGAIN
	MOVE	S1,MTLBLK+.IPCI0	;GET CODE WORD
	CAME	S1,P1			;DOES IT MATCH WHAT WE SENT?
	JRST	SNDS.3			;NO
	SETZM	QUELOK			;CLEAR THE IPCF QUEUE LOCK
	LOAD	S1,RCVMDB+MDB.FG,IP.CFE	;DID WE GET ANY ERRORS?
	JUMPN	S1,.RETF		;IF WE DID, GIVE UP NOW
	$RETT				;OTHERWISE, RETURN A GOOD RETURN

SNDS.3:	SKIPN	S1,IPCQUE		;GET THE IPCF QUEUE ID
	PUSHJ	P,[PUSHJ P,L%CLST	;NONE,,CREATE A LIST FOR IT
		   MOVEM S1,IPCQUE	;SAVE THE ID
		   POPJ  P,  ]		;AND CONTINUE
	PUSHJ	P,L%LAST		;POSITION TO THE LAST ENTRY
	MOVE	S1,IPCQUE		;GET THE ID AGAIN,,LIST MAY BE NULL
	MOVX	S2,MDB.SZ		;GET THE MDB LENGTH
	PUSHJ	P,L%CENT		;CREATE AN ENTRY AT THE END
	MOVE	S1,S2			;GET THE ENTRY ADDRESS
	HRLI	S1,RCVMDB		;GET THE SOURCE ADDRESS
	BLT	S1,MDB.SZ-1(S2)		;COPY THE MDB TO THE IPCF QUEUE
	LOAD	S1,RCVMDB+MDB.MS,MD.CNT	;GET THE MESSAGE LENGTH
	CAXN	S1,PAGSIZ		;IS IT A PAGE ???
	JRST	SNDS.2			;YES,,LETS TRY AGAIN (PAGE IS SAVED)
	PUSH	P,S2			;SAVE THE MDB ADDRESS
	PUSHJ	P,M%GMEM		;NO,,GET A CHUNK TO SAVE IT IN
	EXCH	S1,0(P)			;GET MDB ADDRESS,,SAVE PACKET LENGTH
	STORE	S2,MDB.MS(S1),MD.ADR	;SAVE THE NEW PACKET ADDRESS
	POP	P,S1			;RESTORE THE PACKET LENGTH
	ADD	S1,S2			;CALC CHUNK END ADDRESS
	HRLI	S2,MTLBLK		;GET THE PACKET ADDRESS
	BLT	S2,-1(S1)		;SAVE THE PACKET AS WELL
	SETOM	MSGFLG			;INDICATE ANOTHER MSG POSSIBLE !!
	JRST SNDS.2			;AND GET THE NEXT MESSAGE
> ;END OF IFN FTFLBK FROM START OF SNDSYS

	SUBTTL STAC   - Routine to build INFO messages

; STAC IS USED IN THE $TEXT INSTRUCTION TO DEPOSIT CHARACTERS INTO
; THE MESSAGE THAT IS SENT TO SYSTEM-INFO

STAC:	SOSL	STACL			;IF THERE'S STILL ROOM,
	IDPB	S1,STACP		;STORE A BYTE
	$RETT				;RETURN GOODLY

SUBTTL	SIXASC	Store sixbit word in S2 as an asciz string

;Accepts	S1/ Pointer to destination
;		S2/ Sixbit value

SIXASC:	$SAVE	<P1,P2>
	TLC	S1,777777		;FIX DESTINATION POINTER
	TLCN	S1,777777
	 HRLI	S1,(POINT 7)
	MOVE	P1,[POINT 6,S2]		;GET POINTER TO THE WORD
	MOVEI	P2,6			;STORE SIX CHARACTERS
SIXAS1:	ILDB	TF,P1			;STORE THE TEXT
	ADDI	TF," "
	IDPB	TF,S1
	SOJG	P2,SIXAS1
	MOVE	TF,S1
	IDPB	P2,TF			;TERMINATE WITH A NULL
	$RETT

SUBTTL	C%PIDJ	Return PID owners job number


;CALL IS:	S1/ PID
;
;TRUE RETURN	S1/ Job number of PID's owner


C%PIDJ:	PUSHJ	P,C%PIDH		;GET PID OWNER'S JCH
	$RETIF				;PROPAGATE ERRORS
	ANDI	S1,IP.SJN		;KEEP ONLY JOB NUMBER
	$RETT				;RETURN GOODNESS

SUBTTL	C%PIDH	Return PID owner's JCH


;CALL IS:	S1/ PID
;
;TRUE RETURN	S1/ JCH of PID's owner

C%PIDH:
IFN FTFLBK,<
	SKIPN	OLDMON			;IS THE IPCFM. UUO PRESENT?
	JRST	PIDH.1			;YES, DO THIS THE RIGHT WAY
	$SAVE	<P1>			;RESERVE AN AC
	MOVX	P1,%IPCPM		;PID INDEX MASK
	GETTAB	P1,			;FIND IT
	 MOVX	P1,IP.SJN		;ASSUME JOB NUMBER MASK
	MOVE	S2,P1			;COPY MASK
	AND	S2,S1			;GET JUST INDEX INTO PIDTAB
	HRLZS	S2			;PUT IN APPROPRIATE HALFWORD
	HRRI	S2,.GTPID		;PIDTAB'S GETTAB NUMBER
	GETTAB	S2,			;GET THE MONITOR INTERNAL PID
	 $RETF				;INVALID PID
	EXCH	S1,S2			;SWAP FOR RETURNING JOB NUMBER
	XOR	S2,S1			;CHECK SEQUENCE NUMBERING
	AND	S1,P1			;KEEP ONLY JOB NUMBER HERE
	ANDCM	S2,P1			;AND ONLY THE SEQUENCE BITS HERE
	JUMPN	S2,.RETF		;INVALID IF SEQUENCE NUMBERS DON'T MATCH
	$RETT				;RETURN GOODNESS IF THEY DO

PIDH.1: > ;END OF IFN FTFLBK
	MOVEM	S1,MTLBLK+.IPCS1	;SAVE IN MTLBLK FOR ASKING IPCC
	MOVE	S1,[3,,.IPCSJ]		;LENGTH,,IPCC FUNCTION FOR PID OWNER
	PUSHJ	P,SNDIPC		;ASK IPCC WHO OWNS THIS PID
	$RETIF				;PROPAGATE SNDSYS'S ERRORS
	MOVE	S1,MTLBLK+.IPCS2	;PICK UP THE ANSWER
	$RETT				;AND RETURN GOODNESS

IPC%L:				;LABEL THE LITERAL POOL
	END