Title here
Summary here
Channel Directions in Cilk
Cilk allows you to specify the direction of data flow in function parameters, enhancing type safety in parallel programming. This example demonstrates how to use send-only and receive-only channels in Cilk.
#include <cilk/cilk.h>
#include <cilk/cilk_api.h>
#include <iostream>
#include <string>
#include <deque>
// This ping function only accepts a channel for sending values.
// It would be a compile-time error to try to receive on this channel.
void ping(std::deque<std::string>* pings, const std::string& msg) {
pings->push_back(msg);
}
// The pong function accepts one channel for receives (pings) and a second for sends (pongs).
void pong(std::deque<std::string>* pings, std::deque<std::string>* pongs) {
std::string msg = pings->front();
pings->pop_front();
pongs->push_back(msg);
}
int main() {
std::deque<std::string> pings;
std::deque<std::string> pongs;
ping(&pings, "passed message");
pong(&pings, &pongs);
std::cout << pongs.front() << std::endl;
return 0;
}In this Cilk version, we use std::deque as a simple channel-like structure. The ping function only pushes to the pings deque, while the pong function takes from pings and pushes to pongs.
To compile and run this Cilk program:
$ cilk++ channel_directions.cpp -o channel_directions
$ ./channel_directions
passed messageWhile Cilk doesn’t have built-in channels like some other languages, we can simulate similar behavior using data structures and Cilk’s parallel programming constructs. This example demonstrates the concept of directional data flow in a parallel programming context.