Guide to the latch manager callable services
This information introduces the latch manager services, describes the information you must provide when calling each service, and offers suggestions about when to use each service.
The latch manager provides the following callable services for all SAA high level languages:
| Service | Call Name | Description |
|---|---|---|
| Latch_Create | ISGLCRT | Create a set of latches. |
| Latch_Create | ISGLCR64 | Create a set latches in 64-bit mode. |
| Latch_Identify | ISGLID | Identify a latch. |
| Latch_Identify | ISGLID64 | Identify a latch in 64-bit mode. |
| Latch_Obtain | ISGLOBT | Obtain exclusive or shared control of a latch. |
| Latch_Obtain | ISGLOB64 | Obtain exclusive or shared control of a latch in 64-bit mode. |
| Latch_Release | ISGLREL | Release ownership of an owned latch or a pending request to obtain a latch. |
| Latch_Release | ISGLRE64 | Release ownership of an owned latch or a pending request to obtain a latch in 64-bit mode. |
| Latch_Purge | ISGLPRG | Purge all granted and pending requests for a particular requestor within a specific latch set. |
| Latch_Purge | ISGLPR64 | Purge all granted and pending requests for a particular requestor within a specific latch set while in 64-bit mode. |
The syntax for calling the latch manager callable services in assembler
language is:
CALL routine_name,(parm1,parm2,...return_code)Note: This information references equate symbols and associated numeric
values that are defined in the latch manager interface definition
files (IDFs). (IDFs define variables and values for the parameters
used with latch manager services.) Each equate symbol is followed
by its numeric equivalent; for example, "ISGLREL_COND (value of
1)" indicates the equate symbol ISGLREL_COND and its associated
value, 1. You may specify either the equate symbol or its associated
value when coding the latch manager callable services. For more information
about latch manager IDFs, see Including a latch manager interface definition file (IDF).