ipc          nodejs <-> C interprocess communication library
------------------------------------------------------------
Source Code (Github)

This library enables your nodejs programs to exchange
messages with C programs by using unix sockets.

In order to use this library, you should first compile your
C program and create an executable. Then by using the file
path of executable, nodejs program can spawn that process
and connect to it like this

IPC = require("ipc.js")
IPC.connect("path-of-your-c-executable")

messages can be sent from nodejs to C

IPC.send("sample message")
	
messages that sent from C can be consumed in nodejs

IPC.onmessage = function(msg){ console.log(msg) }

main function of your C program should call ipc_start
to start a blocking event loop that listens the messages 
coming across the unix socket, you must also pass the 
argc and argv parameters of main function to ipc_start
alongside with a function pointer onmsg that handles 
the messages sent from nodejs

int32_t main(int32_t argc, int8_t* argv[])
{
	ipc_start(argc, argv, onmsg);
	return 0;
}


message handler takes 2 self-explanatory parameters msg
and size you can also use the function ipc_send to
send messages from C to nodejs

void onmsg(uint8_t* msg, uint32_t size)
{
	printf("received msg with size %d\n", size);
	ipc_send({65, 66, 67, 68}, 4);
}


To sum up,
this library has 3 library files and 1 example folder

1. ipc.c	C ipc library implementation 
2. ipc.h	C ipc library header file
3. ipc.js	nodejs module for ipc library

In order to see a sample usage check the example folder

1. Run the compile.sh to generate executable
2. Run node test.js