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## Chapter 10
The IPC unit.

This chapter describes the IPC unit for Free Pascal. It was written for L I N U X by Michaël Van Canneyt. It gives all the functionality of system V Inter-Process Communication: shared memory, semaphores and messages. It works only on the L I N U X operating system.

The chapter is divided in 2 sections:

- The first section lists types, constants and variables from the interface part of the unit.
- The second section describes the functions defined in the unit.

10.1 Types, Constants and variables :
Variables
Constants
Types
10.2 Functions and procedures
ftok
msgget
msgsnd
msgrcv
msgctl
semget
semop
semctl
shmget
shmat
shmdt
shmctl

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