C++ Channel & WaitGroup

An implementation of Channel & WaitGroup inspired by Go.

WARNING: Don't use it in production (see: #1)

Example (Channel & WaitGroup in action)

Examples can be found in the directory "./example":

#include<chrono>
#include<iostream>
#include<string>
#include<thread>
#include"../waitgroup.h"
#include"../channel.h"intmain() {
Channel<std::string> chan;
WaitGroup wg;
wg.Add(2);
std::thread first([&]() {
for (int i = 0; i < 8; i++) {
// Sending the message to the channel:
chan << "from thread first: hello";
std::this_thread::sleep_for(std::chrono::seconds(1));
chan.Send("from thread first: world");
}
wg.Done();
});
std::thread second([&]() {
for (int i = 0; i < 5; i++) {
chan.Send("from thread second: hello");
std::this_thread::sleep_for(std::chrono::seconds(1));
chan.Send("from thread second: world");
}
wg.Done();
});
// checker waits for all threads to finish their// work and closes the channel.
std::thread checker([&]() {
wg.Wait();
chan.Close();
});
while (1) {
auto item = chan.TryRecv();
if (!item) {
break;
}
std::cout << *item << "\n";
}
std::cout << "All work has been done\n";
first.join();
second.join();
checker.join();
return0;
}

Output:

$ ./main2
from thread first: hello
from thread second: hello
from thread first: world
from thread first: hello
from thread second: world
from thread second: hello
from thread first: world
from thread second: world
from thread first: hello
from thread second: hello
from thread first: world
from thread second: world
from thread first: hello
from thread second: hello
from thread second: world
from thread first: world
from thread second: hello
from thread first: hello
from thread second: world
from thread first: world
from thread first: hello
from thread first: world
from thread first: hello
from thread first: world
from thread first: hello
from thread first: world
All work has been done

In order to compile the examples simply go to the './example' directory and enter make.

Links

• Go Channels
• Go WaitGroup

Motivation

This is one of my first C++ library and I wrote it mainly to learn more about C++.