Interprocess communication in os

Most modern computer systems use the notion of a process that lets us execute multiple tasks at any time. And, as multiple processes execute at the same time, often they need to communicate with each other for various reasons. In this tutorial, we’ll discuss the operating system process, its types, inter-process communication (IPC), and various modes. 2. Process Overview We write computer programs that perform a designated task. A program when in execution is a process. However, a program is more than the program source code. A process is an active entity that contains various additional components other than the program source code. A process contains a process stack to store the temporary data such as function parameters, local variables, etc, a data section to store global variables, a heap memory allocated dynamically at runtime. 2.2. Process Control Block Once a process is in execution, it changes its The above diagram demonstrates the state transition diagram of a process. • New: Initially, when the process is created it is in a new state • Ready: Process moves to the ready state once it is ready to execute in a processor • Running: Once the process is in execution in a processor, it is in a running state. Only one process can be in running status in a processor at any time. A process moves to the ready state if there is an interrupt • Waiting: While executing if the process needs to perform some additional event such as input/output access, it is moved to waiting fo...

Tips To return expected results, you can: • Reduce the number of search terms. Each term you use focuses the search further. • Check your spelling. A single misspelled or incorrectly typed term can change your result. • Try substituting synonyms for your original terms. For example, instead of searching for "java classes", try "java training" • Did you search for an IBM acquired or sold product ? If so, follow the appropriate link below to find the content you need. Answer This document defines the interprocess communication (IPC) and is applicable to AIX versions 4 and 5. Official definition: Interprocess communication (IPC) is used for programs to communicate data to each other and to synchronize their activities. Semaphores, shared memory, and internal message queues are common methods of interprocess communication. What it means: IPC is a method for two or more separate programs or processes to communicate with each other. This avoids using real disk-based files and the associated I/O overhead to pass information. Like a file, you must first create or open the resource, use it and close it. Like real files, the resources have an owner, a group, and permissions. Until you remove the resource it continues to exist. Unlike real disk-based files, semaphores, message queues and shared memory do not persist across reboots. Use IPCs when you need to talk between programs, you want the talking to be fast, and you do not want to write the code to manage the low-level details of...

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In this tutorial, we will go through an overview of inter process of communication in operating system. We will see different types of processes, advantages of inter process communication, different techniques in inter process communication – (a) shared memory and (b) message passing. We will go through shared memory and message passing in detail. At last, we will see different scenarios where inter process communication is used. Inter Process Communication is a mechanism which allows processes to communicate with each other and synchronize their actions. Whatever process is present in the system, they can communicate with each other. It is a method of cooperation. There are two types of processes – • Independent Process: An Independent process is not affected by other executing processes. • Cooperating Process: A Cooperating process can be affected by other executing processeses. For inter process communication, it is compulsory that all the processes are cooperating processes. Why do we use inter process communication ? Some of the benefits of using inter process communication are – • Information Sharing: Multiple processes can share same information to perform some tasks. In such scenarios, inter process communication helps. There may be a scenario when a process needs to access remote process. In such case, this method of communication helps. • Resource Sharing: We can do with the help of inter process communication. • Communication speed: Computational speed will also...