4. Facilities for User Data

This chapter explains the following:

Facilities for using the OpenTP1 file services (TP1/FS/Direct Access, TP1/FS/Table Access)

IST service (TP1/Shared Table Access)

Facilities for using ISAM files

Accessing database management systems

Facility for locking files and other resources

The facilities are explained using C-language function names. For each function, the name of the equivalent COBOL-language API function is indicated in brackets [ ] when the function appears first in this chapter. After that, only the C-language function name is written. If the C-language function has no COBOL counterpart API function, brackets are not written.

This chapter contains the following sections:

Organization of this chapter

4.1 DAM file service (TP1/FS/Direct Access)

4.2 TAM file service (TP1/FS/Table Access)

4.3 IST service (TP1/Shared Table Access)

4.4 ISAM file service (ISAM, ISAM/B)

4.5 Accessing database management systems

4.6 Lock for resources

4.7 Responses to the occurrence of deadlocks