how to declare the Size of message in PROMELA?

Question

Is there any method to specify the size of message?. For example if i want to send message data through channel AB then how can I specify the size of data in PROMELA language?

Answer 1

The syntax for declaring a channel is, for example:

chan ab = [16] of { short }

ab is the identifier bound to the channel. 16 is the number of messages in the channel. short is the data type of each message.

When you specify the message type you have a number of additional options:

char ab = [16] of { byte, short, bit }

which creates a channel with each message being: byte, short, and bit. In such a case it is often better to create a new type with:

typedef message {
  byte operator;
  short data;
  bit what;
};

and then

chan ab = [16] of { message }