212B ReentrantSegment¶

Stub MON 212B (138 decimal) · Mnemonic SREEN · Group: Segment Administration (manual section 2.12)

Available from: All programs (manual compatibility box)

Emulation source: src/handlers/mon_212B_ReentrantSegment.c

Description¶

Connects a reentrant segment to your two current segments. All modified pages of your current segments are written to the segment file before the reentrant segment is fetched. This is almost equivalent to SaveSegment followed by AttachSegment. However, ReentrantSegment is more efficient. Only the modified pages overlapping the reentrant segment are written back.

Parameters¶

Name	Type	Direction	Description
`SegmentNumber`	INTEGER	In	Segment number to attach.

Direction: In = the program supplies the value, Out = the call returns it, In/Out = both.

Compatibility¶

Machines	Users	Programs
ND-100	All users	All programs

The manual's compatibility box for this call, word for word.

Yes/no fields from the YAML extraction (not in the manual's words):

ND-100	ND-500	User programs	RT programs	System programs
Yes	Yes	Yes	Yes	No

Disagreement

The manual box says ND-100, but the yes/no fields say ND-100 = Yes, ND-500 = Yes. The manual box is the source.

Examples¶

From the manual (OCR text, not corrected).

PLANCFORTRANPascalCOBOLMAC

INTEGER : SegmentNumber
...
Monitor_Call('ReentrantSegment', SegmentNumber)

INTEGER SegmentNumber
...
Monitor_Call('ReentrantSegment', SegmentNumber)

SegmentNumber : INTEGER2;
...
ReentrantSegment(SegmentNumber);

01 SegmentNumber COMP.
...
MONITOR-CALL "ReentrantSegment" USING SegmentNumber.

| Instruction | Parameter | Description                             |
|-------------|-----------|-----------------------------------------|
| LDA         | (PAR      | %Load register A with address of parameter list. |
| MON         | 212       | %Monitor call ReentrantSegment.         |
| PAR,        | SEGNO     | %Segment number.                        |
| ...         | SEGNO,    | ...                                     |

ndmonlib implementation¶

Stub Registered MON_STATUS_NOT_IMPLEMENTED: the handler is a stub. mon_dispatch() in src/core/mon_dispatch.c reports the call as unimplemented without calling it.


Handler	`mon_212B_ReentrantSegment`
Code lines	6 (non-blank, non-comment lines in the file)

Source¶

SINTRAN III Monitor Calls (ND-860228.2 EN), page 407.