This document discusses inter-process communication (IPC), which allows processes to exchange data and synchronize actions. IPC involves two parts: unicast from one process to another, and multicast from one process to a group. There are two types of IPC - independent processes that are not affected by others, and cooperating processes that can impact one another. IPC enables information sharing, resource sharing, modularity, and helps operating systems communicate via shared memory or message passing.

1. ADVANCE
OPERATING SYSTEM
Darakhshan Nayab
MSC(IT)
MS(Computer Science)
Dept.of Computer Science

2. Contents
■ Inter-Process Communication
■ IPC Parts
■ Type
■ Why IPC
■ Machanism
■ Operations
■ Basic Diagram

3. Inter-process Commination
■ Inter process communication (IPC) is used for exchanging
data between multiple threads in one or more processes or
programs.
■ IPC is a machanism that allows processes to communicate
with each other and synchronize their actions.

4. IPC Parts
There are two parts of IPC.
■ Unicast
■ Multicast
UniCast
Unicast communication is from one process to another single
process.(i.e. Socket Communication)
MultiCast
Multicast Commination is from process to the group of
processes(i.e. Publish/subscriber message modules)

5. Types
There are two types of Inter-Process Communication.
■ Independent Pocesses
■ Co-operating Process
Independent Process
An independent process is not affected by the execution of
other processes.
Co-operating Process
Co-operating process can be affected by other executing
processes.

6. Why IPC?
■ Information Sharing
■ Recourse Sharing
■ It helps to speedup modularity
■ Computational Speedup Increase
■ Convenience
■ Helps operating system to communicate with each other and synchronize their
actions.

7. IPC Mechanism
Communicate with each other by two ways.
■ Shared Memory
■ Message Passing
Shared Memory.
Shared memory is a memory shared between two or more processes
that are established using shared memory between all the processes.
This type of memory requires to protected from each other by
synchronizing access across all the processes.
Message Passing.
It is a mechanism for a process to communicate and synchronize. Using
message passing, the process communicates with each other without
resorting to shared variable.

9. Message Passing Operations
IPC mechanism operations:
■ Send(message, Destination)
■ Receive (Message,Host)