In computer science, inter-process communication (IPC), also spelled interprocess communication, are the mechanisms provided by an operating system for processes to manage shared data. Typically, applications can use IPC, categorized as clients and servers, where the client requests data and the server responds to client requests. Many applications are both clients and servers, as commonly seen in distributed computing.
IPC is very important to the design process for microkernels and nanokernels, which reduce the number of functionalities provided by the kernel. Those functionalities are then obtained by communicating with servers via IPC, leading to a large increase in communication when compared to a regular monolithic kernel. IPC interfaces generally encompass variable analytic framework structures. These processes ensure compatibility between the multi-vector protocols upon which IPC models rely.
An IPC mechanism is either synchronous or asynchronous. Synchronization primitives may be used to have synchronous behavior with an asynchronous IPC mechanism.
Different approaches to IPC have been tailored to different software requirements, such as performance, modularity, and system circumstances such as network bandwidth and latency.
remote procedure call
Java's Remote Method Invocation (RMI)
ONC RPC
XML-RPC or SOAP
JSON-RPC
Message Bus (Mbus) (specified in RFC 3259) (not to be confused with M-Bus)
NET Remoting
gRPC
The following are messaging, and information systems that utilize IPC mechanisms but don't implement IPC themselves:
KDE's Desktop Communications Protocol (DCOP) - deprecated by D-Bus
D-Bus
OpenWrt uses ubus micro bus architecture
MCAPI Multicore Communications API
SIMPL The Synchronous Interprocess Messaging Project for Linux (SIMPL)
9P (Plan 9 Filesystem Protocol)
Distributed Computing Environment (DCE)
Thrift
ZeroC's Internet Communications Engine (ICE)
ØMQ
Enduro/X Middleware
YAMI4
Enlightenment_(software) E16 uses eesh as an IPC
The following are platform or programming language-specific APIs:
Apple Computer's Apple events, previously known as Interapplication Communications (IAC)
ARexx ports
Enea's LINX for Linux (open source) and various DSP and general-purpose processors under OSE
The Mach kernel's Mach Ports
Microsoft's ActiveX, Component Object Model (COM), Microsoft Transaction Server (COM+), Distributed Component Object Model (DCOM), Dynamic Data Exchange (DDE), Object Linking and Embedding (OLE), anonymous pipes, named pipes, Local Procedure Call, MailSlots, Message loop, MSRPC, .