Program Activation
Activation is the process used to prepare a program to run. Both ILE programs and service programs must be activated by the system before they can be run.
Program activation includes two major steps:
- Allocate and initialize static storage for the program.
- Complete the binding of programs to service programs.
This topic concentrates on step 1. Step 2 is explained in Service Program Activation.
Figure 1 shows a program object that is stored in permanent disk storage. As with all IBM® i objects, program objects can be shared by multiple concurrent users running in different jobs and only one copy of the program's instructions exists. However, when a program is activated, storage for program variables must be allocated and initialized.
As shown in Figure 1, each program activation has its own copy of these variables.
