Multi-process communication system and establishment and communication method thereof

Abstract

The invention discloses a multi-process communication system and an establishment and communication method thereof. The multi-process communication system comprises a central process and multiple processes. The processes are connected to the central process in an IPC (internet process connection) manner. The central process writes communication connecting identifiers and process identifiers of the processes into a correspondence table. When one optional process of the processes serves as a sending process, sends data to another process, serving as a receiving process, and is different with the sending process, of the processes; the central process receives the data, finds out the communication connecting identifier of the receiving process from the correspondence table according to the process identifier of the receiving process and sends the data to the receiving process according to the communication connecting identifier of the receiving process. An emanative communication connecting structure is established among the multiple processes, so that data communication among the processes can be implemented without establishing a large amount of IPC instances among the processes.

Description

technical field [0001] The invention relates to a multi-process communication system and its establishment and communication method, in particular to a multi-process communication system for an embedded system and its establishment and communication method. Background technique [0002] In existing operating systems, especially in embedded systems, each process has its own address space, and one process cannot access the memory data of another process. Although two processes can be addressed by a pointer with the same value, the two processes will still be mapped to different physical addresses. What is read and written is only their respective data, thus avoiding mutual interference between processes. For example, if a pointer P is declared in process A, this pointer can only be used by this process A, and using P in other process B will cause fatal problems, so this operation is prohibited in the existing operating system. In this way, the execution environment of each p...

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Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a multi-process communication system and its establishment in order to overcome the complex structure of the communication connection in the prior art and too many IPC instances leading to the occupation of a large amount of system resources. and communication method, by using the existing IPC method, a star-shaped communication connection structure is constructed to overcome the disadvantages brought by the existing mesh communication connection structure

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