REALLOC or No macro - is type 4, gets LOCAL lock.
Calls module IGGDAC01.
APF protected. The REALLOC macro always loads the parameter list
address in register 1 and complements it. Other combinations have
no macro. GTF data is:
- R15
- No applicable data.
- R0
- If positive, contains address of associated JFCB. If negative
(not complemented — high-order bit is set on), contains the address
of the associated partial DSCB.
- R1
- If positive, contains the address of a fullword containing: device
code. If call made for a VIO data set (JFCVRDS is set on) UCB address.
If negative (complement address), contains the address of a REALLOC
parameter list and R0 contains no applicable data. The parameter list
is 32 bytes long as described below:
To pass
a dummy REALLOC parameter list on the JFCB or partial DSCB interface,
where R0 contains applicable data, specify byte 9 bit 0 in the REALLOC
parameter list. The UCB address must also be set. The Minimum Allocation
Unit can optionally be set. All other fields in the REALLOC parameter
list are ignored. - Bytes
- Description
- 0-3
- C'REAL', ID of parameter list.
- 4-5
- Length of parameter list.
- 6-7
- Return code.
- 8
- Parameter flag byte.
- 9
- Processing flag byte.
| Bits |
Description |
|---|
| 1... |
.... |
Dummy REALLOC parameter list is passed. Only the processing flag byte (byte 9), Minimum Allocation Unit
(bytes 16-19), and UCB address (bytes 24-27) are used. Ignore all
other bytes and use the values in the JFCB or Partial DSCB interface
as passed in register 0.
|
| .1.. |
.... |
Space must be allocated from track-managed
space. |
| ..1. |
.... |
Reserved set to zeros. Applicable
to EAV. The request is to be allocated using a combination of the
track-managed or the cylinder-managed spaces. If the exact space
is not available, then the request is failed.
|
| .... |
.x.. |
Unused. |
| .... |
..11 |
The extended attribute (EATTR=) value to be
used. Valid when byte 9, bit 0 is set and when the JFCB is passed
in register 0.Description for each value: - b‘00’
- EATTR has not been specified. The defaults for EAS eligibility
apply. VSAM data sets default is EAS-eligible. This is equivalent
to EATTR=OPT being specified. Non-VSAM data sets default is not EAS
eligible. This is equivalent to EATTR=NO being specified.
- b‘01’
- EATTR=NO has been specified. The data set cannot have extended
attributes (format 8 and 9 DSCBs) or optionally reside in EAS.
- b‘10’
- EATTR=OPT has been specified. The data set can have extended attributes
and optionally reside in EAS. This is the default for VSAM data sets.
- b‘11’
- Reserved for future use.
|
- 10
- Number of contiguous partial format 9 DSCBs that are located at
the address in bytes 32-35. The default is 1.
- 11
- Reserved.
- 12-15
- Data set size in tracks.
- 16-19
- Minimum allocation unit in tracks.
- 20-23
- Address of partial DSCB or format 1 DSCB.
- 24-27
- UCB Address.
- 28-31
- Partitioned data set directory quantity in tracks.
- 32-35
- Address of format 2 DSCB or contiguous partial format
9 DSCBs. Byte 10 defines the number of partial format 9 DSCBs. Format
9 DSCBs with a subtype field with a value other than 1 is ignored.
Only format 9 DSCB attribute data in this model is used.
- 36-39
- Address of format 3 DSCB.
| CUU |
cccc |
Device number from the UCB pointed to by R1. |
| DSN |
cccc... |
Data set name from the DSN field of either the JFCB or DSCB
pointed to by R0. |