Step 1: Create A Communication Endpoint - HP A4500A - VMEbus Single Board Computer 744 Motherboard Programmer's Manual

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Step 1: Create a Communication Endpoint

Step 1: Create a Communication
Endpoint
Process A and Process B must both create communication endpoints as
shown in Figure 3-1, using the call ap_open(). A communication endpoint
is a file descriptor (fd) which is returned on successful completion of the
ap_open() call. The process uses the file descriptor in all subsequent A/P
calls.
Each process must create a communication endpoint, and only one
association can be associated with each endpoint. To create multiple
associations, you must create additional communication endpoints for
each one.
Figure 3-1 Create a Communication Endpoint
Process A Process B
ap_open()
ap_open()
Communication Communication
Endpoint B
Endpoint A
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