An easier solution might be to use a WCF duplex contract with the Windows service hosting the WCF service. The client App would call an operation on the service to register itself, when it starts up. The Ping would then be an operation invoked periodically by the service on the client’s callback contract, to which … Read more
This is cheesy, but it is the only method I have gotten to work. Create a ‘fake’ client and connect to your named pipe to move past the WaitForConnection. Works every time. Also, even Thread.Abort() did not fix this issue for me. _pipeserver.Dispose(); _pipeserver = null; using (NamedPipeClientStream npcs = new NamedPipeClientStream(“pipename”)) { npcs.Connect(100); }
One of the best examples of a practical use of a named pipe… From http://en.wikipedia.org/wiki/Netcat: Another useful behavior is using netcat as a proxy. Both ports and hosts can be redirected. Look at this example: nc -l 12345 | nc www.google.com 80 Port 12345 represents the request. This starts a nc server on port 12345 … Read more
Right now, .NET doesn’t support sections (aka Memory Mapped Files). It will soon, the 4.0 version has the System.IO.MemoryMappedFiles namespace. There is a good reason it took so long and also the reason you are not going to be happy with this addition. Using pointers is mandatory in MMFs, the shared memory is made available … Read more
In order to connect to an existing named pipe you can utilize the CreateFile API provided through the pywin32 package. Since it took me a while to put a working base together here is an example client/server which works fine for me (python 3.6.5, pywin32 223 on Windows 10 Pro x64): import time import sys … Read more
You cannot create a named pipe by calling CreateFile(..). Have a look at the pipe examples of the MSDN. Since these examples are quite complex I’ve quickly written a VERY simple named pipe server and client. int main(void) { HANDLE hPipe; char buffer[1024]; DWORD dwRead; hPipe = CreateNamedPipe(TEXT(“\\\\.\\pipe\\Pipe”), PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT, // … Read more
Both on Windows and POSIX systems, named-pipes provide a way for inter-process communication to occur among processes running on the same machine. What named pipes give you is a way to send your data without having the performance penalty of involving the network stack. Just like you have a server listening to a IP address/port … Read more
Best results you’ll get with Shared Memory solution. Named pipes are only 16% better than TCP sockets. Results are get with IPC benchmarking: System: Linux (Linux ubuntu 4.4.0 x86_64 i7-6700K 4.00GHz) Message: 128 bytes Messages count: 1000000 Pipe benchmark: Message size: 128 Message count: 1000000 Total duration: 27367.454 ms Average duration: 27.319 us Minimum duration: … Read more
Use Named Pipes to Communicate Between Java and .Net Processes Relevant part in the link try { // Connect to the pipe RandomAccessFile pipe = new RandomAccessFile(“\\\\.\\pipe\\testpipe”, “rw”); String echoText = “Hello word\n”; // write to pipe pipe.write ( echoText.getBytes() ); // read response String echoResponse = pipe.readLine(); System.out.println(“Response: ” + echoResponse ); pipe.close(); } … Read more
To emulate the bash process substitution: #!/usr/bin/env python from subprocess import check_call check_call(‘someprogram <(someprocess) <(anotherprocess)’, shell=True, executable=”/bin/bash”) In Python, you could use named pipes: #!/usr/bin/env python from subprocess import Popen with named_pipes(n=2) as paths: someprogram = Popen([‘someprogram’] + paths) processes = [] for path, command in zip(paths, [‘someprocess’, ‘anotherprocess’]): with open(path, ‘wb’, 0) as pipe: … Read more