List five ways to communicate between processes in Windows 40

Inter-process communication (IPC) refers to the dissemination and exchange of information between different processes.

There are seven common ways to communicate between processes:

Divided by communication type:

1. Shared storage system.

2. Pipeline communication system.

3. Messaging system.

4. Client-server system.

A stream of data that connects one process to another process is called a pipeline, usually with the output of one process as the input of another process. Essentially, it's a piece of cache for the kernel. There are two main types of Linux pipelines: nameless pipelines and named pipelines.

Basic features: Message queue usage examples are described in detail.

Features: 1. The semaphore is used for synchronization between processes, and to pass between processes, it needs to be combined with shared memory.

2. The semaphore is based on the PV operation of the operating system, and the operation of the program on the semaphore is an atomic operation.

3. Each PV operation on the semaphore is not limited to adding 1 or subtracting 1 from the value of the semaphore, but can also add or subtract any positive integer.

4. Support semaphore groups.

An introduction to semaphore functions and examples of them in practice.

An introduction to shared storage and its practices.

Introduction to sockets and their practice.

Introduction to Signals Introduction to Signals and their practice.

Interprocess Communication (IPC) is a set of programming interfaces that allow programmers to coordinate different processes so that they can run simultaneously in an operating system and pass and exchange information with each other. This allows a program to handle the requests of many users at the same time. This is because even if only one user makes a request, it can lead to the running of multiple processes in an operating system, and the processes must talk to each other.

The IPC interface offers this possibility. Each IPC method has its own advantages and limitations, and in general, it is not common to use all IPC methods for a single program.

1. Nameless channel communication.

Pipe: A pipe is a half-duplex communication method in which data can only flow in one direction and can only be used between processes that are related, usually parent-child relationships.

2. Advanced pipeline communication.

High-level pipeline (popen): If another program is started as a new process in the current program, it is considered a child of the current program, which is called high-level pipeline.

3. Famous pipeline communication.

Named Pipe: A named pipe is also a half-duplex communication method, but it allows communication between unrelated processes.

4. Message queue communication.

Message queue (message

Queue): A message queue is a linked list of messages, stored in the kernel and identified by a message queue identifier, which overcomes the shortcomings of few signaling messages, pipes that can only carry unformatted byte streams, and limited buffer sizes.

5. Semaphore communication.

Semophore: A semaphore is a counter that can be used to control access to a shared resource by multiple processes, and is often used as a locking mechanism to prevent other processes from accessing a shared resource while one process is accessing the resource. Therefore, it is mainly used as a means of synchronization between processes and between different threads within the same process.

6. Signal. Sinal: Signaling is a complex communication method used to notify the receiving process that an event has occurred.

7. Shared memory communication.

Shared memory (shared

memory: Shared memory is a map of a piece of memory that can be accessed by other processes, created by one process, but accessible by multiple processes. Shared memory is the fastest IPC method, and it is designed to deal with the inefficiency of other inter-process communication methods.

It is often used in conjunction with other communication mechanisms, such as semaphores, to enable synchronization and communication between processes.

8. Socket communication.

Socket: A socket is also an inter-process communication mechanism, and unlike other communication mechanisms, it can be used to communicate between processes between different machines.

There are shared memory, pipes, semaphores, and message queues...

There are shared memory, pipes, semaphores, sockets, etc.