Explain the communications of request or response interface, Operating System

Assignment Help:

Explain the Communications of Request or Response Interface

The inter-application communication must provide four specific interface to the CSInterface() components. A client must be able to send and receive from the server and the server must be able to receive from the client and return results. The communications interface must provide these generic services to the application layer while remaining transport independent at the bottom layer. Communications interface components may be required to perform more advanced functions than simple send and receive. First, it is their responsibility to mask the underlying protocols from the developer.

Second the communications interface must manage the modes of operation for CSInterface(). Our previous example of CSInterface() used CallServer() to communicate with the server computer. The client uses the CallServer() procedure to send request to the server in either synchronous or asynchronous mode:

  • In synchronous mode, client request will be returned upon receipt of results from the server.
  • In asynchronous mode, the CallServer() function will need to send the request to the server and immediately return.

 

Third, with the inclusion of callback procedures, the communications interface component must initiate the callback to the application- level code. Callbacks are most easily managed by including a pointer to the procedure in the REQHEADER for each CSInterface() call as documented in the previous section.

When the server returns the result of executed procedure, the communications interface can scan the REQHEADER for configured callbacks. If they exist, the communications interface should dispatch CSInterfaceSetupCallback() for setup and execution of the callback.


Related Discussions:- Explain the communications of request or response interface

What is an effector process, What is an effector process? The effector ...

What is an effector process? The effector process is a method that verifies itself.The effector process exists in particular criteria.

Explain multi-user based operating system, Multi-user - A multi-user Opera...

Multi-user - A multi-user Operating System permits for multiple users to use the same computer at the same time and/or different times. Below are some instances of multi-user Op

Explain the reasons why an organisation fail to plan, Problem 1: (a) Wh...

Problem 1: (a) What are the likely benefits which an organisation may derive from the planning process? (b) Explain the main reasons why an organisation may fail to plan.

Process Management, In a table format, discuss the differences between th...

In a table format, discuss the differences between the fixed partition and the variable partition memory organization in terms of the basic idea, memory structure, advantages

NETWORK OPERATING SYSTEM, explain about design issues of network operating ...

explain about design issues of network operating system

#title. operation research, What are the features of Operation Research app...

What are the features of Operation Research approach?

Define an imperative statement, Determine an imperative statement Imper...

Determine an imperative statement Imperative statement points out an action to be carried out during execution of assembled program

Explain the concept of reentrancy, Concept of Reentrancy   It is a ...

Concept of Reentrancy   It is a useful, memory-saving method for multiprogrammed timesharing machines. A Reentrant method is one in which multiple clients can share a singl

Write a program to synchronize the agent, The Cigarette-Smokers difficulty ...

The Cigarette-Smokers difficulty Consider a system with three smoker processes and one agent process. Every smoker continuously rolls a cigarette and then smokes it. But to roll as

Naming scheme for servers in an enterprise, Problem: Within a corporate...

Problem: Within a corporate environment, there are usually many servers located across various departments. Naming of servers is often a tedious task. In many circumstances, w

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd