HP 800 ACSE/Presentation and ROSE Interface Programmer's Guide - Page 34

Step 2: Establish an Association

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Using ACSE/Presentation Step 2: Establish an Association Figure 3-2 Step 2: Establish an Association The steps to establish an association are described below. Initialize the A/P Environment To use the A/P services, each process must initialize the ACSE/Presentation environment by calling ap_init_env(). (See Figure 3-2.) The ap_init_env() call allocates memory for the environment attributes, and sets the attributes to default values. (See the AP_ENV Table of Attributes in Appendix A for more information.) Since this implementation does not support the environment file, the env_file parameter is ignored. To modify defaulted attribute values, the ap_set_env() call is used as shown in the following steps. Initialize Environment Process A Process B AP Environment A ap_init_env() AP Environment B ap_init_env() Communication Endpoint A 34 Communication Endpoint B Chapter 3

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34
Chapter 3
Using ACSE/Presentation
Step 2: Establish an Association
Step 2: Establish an Association
The steps to establish an association are described below.
Initialize the A/P Environment
To use the A/P services, each process must initialize the
ACSE/Presentation environment by calling ap_init_env(). (See Figure
3-2.)
The ap_init_env() call allocates memory for the environment attributes,
and sets the attributes to default values. (See the AP_ENV Table of
Attributes in Appendix A for more information.)
Since this implementation does not support the environment file, the
env_file parameter is ignored.
To modify defaulted attribute values, the ap_set_env() call is used as
shown in the following steps.
Figure 3-2
Initialize Environment
Communication
Communication
Endpoint A
Endpoint B
Process A
Process B
AP Environment A
AP Environment B
ap_init_env()
ap_init_env()