Window Named Pipes Example

Client and Server that can send some data and command to each other. Common code moved to a library.

To send data between client and server I create simple protocol. Each packet start with byte which set what packet contain and what receiver should do with it. Commands and data types described in SBAPPLib\SBAPPLib.h in enums proto_command_id and proto_value_type

Class sbapp_pipe have methods to prepare packet in char buffer and get command from such buffer.

Protocol supports sending objects of class someTestClass. Server have list of received objects and can return object to Client or call a method of object.

Client simple open pipe, send some data and commands to server, check answers and quit. You can run many clients simultaneously. I add few second sleep between sending packet so it will be easier to run them together.

Server can work in two modes. Overlapped and Multythreaded as described in msdn articles about named pipes usage. In Overlapped mode client send all test packets and after that get answers from pipe and process them.
In Multythreaded mode client check servers answer before sending next packet.

Build

Create some folder

mkdir Build
cd Build

Prepare visual studio compiler environment

call "R:\Program Files\Visual Studio 2015 CE\vc\bin\x86_amd64\vcvarsx86_amd64.bat" 

Use cmake to generate visual studio project

cmake -G "Visual Studio 15 2017"  -DPRINT_POCKET_INFO=ON -DOVERLAPPED_MODE=ON ../   

Option PRINT_POCKET_INFO enables more info about sent packet in logs Option 'VERLAPPED_MODE' enables FILE_FLAG_OVERLAPPED in servers named pipe Build programs

cmake --build . --target ALL_BUILD --config Debug -- /p:CharacterSet=Unicode

Run

You can find programs in Build\Release or Build\Debug Just run SBAPPServer and then run few copies of SBAPPClient. Output will be something like that

Pipe client connected
41: Recieved int :"29600"
41: Recieved str :"SomeString"
41: Recieved : someClass[ cost:12345, count:333, points:116, Name:"TestName", City:"CityNameName" ]
41: Recieved : someClass[ cost:543210, count:111, points:237, Name:"AnotherName", City:"MoreCityName" ]
41: Recieved request for object id:"1"
41: Recieved function call for object id:"1", function generatePoints
41: Recieved function call for object id:"1", function resetCost
41: Recieved request for object id:"1"
Pipe client disconnected

log line started with random id of a connection from which data was received. In case you run few clients. Then some info about incoming packet.