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Encyclopedia > Interprocess communication

Inter-process communication (IPC) is the exchange of data between one process and another, either within the same computer or over a network. It implies a protocol that guarantees a response to a request. Examples are Unix sockets, RISC OS's messages, Mach ports, OS/2's named pipes, Microsoft Windows' DDE, Novell's SPX, Apple Macintosh's IAC (particularly AppleEvents) and different forms of software componentry (CORBA, Component Object Model ...).


Although IPC is performed automatically by programs, an analogous function can be performed interactively when users cut and paste data from one process to another using a clipboard.


Table of IPC Methods:

Method Operating Systems
File All operating systems
Signal All operating systems
Pipe All POSIX systems
Named pipe All POSIX systems
Shared memory All POSIX systems
Memory map All POSIX systems; may carry race condition risk if a temporary file is used

References

  • System V IPC (http://www.wlug.org.nz/ipc(5)) under Linux (man page)

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