z/OS Communications Server: CSM Guide
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Functions provided by the CSM API

z/OS Communications Server: CSM Guide
SC27-3647-00

This section describes the functions that a CSM user needs in order to create and use storage pools. The IVTCSM macroinstruction provides the interface for applications issuing requests to CSM.

Use the IVTCSM macroinstruction to issue the following types of requests:

See CSM macroinstructions for the complete description and syntax of each request.

Table 1 contains a cross reference of IVTCSM requests and their valid input and output parameters.

Table 1. Valid operands for IVTCSM macroinstruction
REQUEST

C
R
E
A
T
E

P
O
O
L

D
E
L
E
T
E

P
O
O
L

G
E
T

B
U
F
F
E
R

F
R
E
E

B
U
F
F
E
R

A
S
S
I
G
N

B
U
F
F
E
R

C
H
A
N
G
E

O
W
N
E
R

F
I
X

B
U
F
F
E
R

P
A
G
E

B
U
F
F
E
R

C
O
P
Y

D
A
T
A

D
U
M
P

I
N
F
O

R
E
S
O
U
R
C
E

S
T
A
T
S
PLISTVER Oi Oi Oi Oi Oi Oi Oi Oi Oi Oi Oi
BACK Oi                    
BUFLIST     Ri Ri Ri Ri Ri Ri      
BUFNUM     Ri Ri Ri Ri Ri Ri      
BUFSIZE Ri                    
BUFSOURC Ri                    
BUFTYPE     Ri   Oi     Ri      
CLEAR     Oi Oi              
DS_INFO Oo                 Oo  
ERRBFLST     Oo Oo Oo Oo Oo Oo      
EXPBUF Ri                    
FREERTN     Oi                
FREETO       Oi              
GAP     Oi Oi Oi Oi Oi Oi      
INITBUF Ri                    
MF Ri Ri Ri Ri Ri Ri Ri Ri Ri Ri Ri
MINFREE Ri                    
OWNERID     Oi   Oi Oi          
PAD                 Oi    
POOLTOKN   Ri Ri                
PADCHAR                 Oi    
RETCODE Oo Oo Oo Oo Oo Oo Oo Oo Oo Oo Oo
RETPTOKN Oo                    
RSNCODE Oo Oo Oo Oo Oo Oo Oo Oo Oo Oo Oo
SKIPBUF       Oi   Oi          
SRCERRL                 Oo    
SRCGAP                 Oi    
SRCLIST                 Ri    
SRCNUM                 Ri    
STATAREA Oo                   Oo
TARGERRL                 Oo    
TARGGAP                 Oi    
TARGLIST                 Ri    
TARGNUM                 Ri    
TASKID     Oi   Oi Oi          
THREAD     Oi Oi Oi Oi Oi Oi Oi    
UTILRTN     Oi Oi Oi Oi Oi Oi Oi    
WAIT     Oi       Oi        
Key: R=Required O=Optional i=input o=output
Parent topic: Communications storage manager (CSM) overview

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