Method of using shared memory to realize inter-process communication
Inter-process communication (IPC) is one of the important concepts in the operating system for data exchange and coordination between different processes. Shared memory is an efficient inter-process communication mechanism, which can share the same physical memory area among multiple processes to achieve the purpose of data sharing. This article will introduce how to use shared memory to implement inter-process communication, and give corresponding code examples.
The basic principle of shared memory is to map a physical memory to the virtual address space of multiple processes, so that each process can realize data transfer and synchronization by reading and writing this memory. In AutoSAR, we can use the relevant API provided by the operating system to create and manage shared memory areas.
The following is a sample code in C language that shows how to use shared memory to communicate between two processes:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>