kunigami

if (!fork()) {
  printf("I'm the child!\n");
} else {
  printf("I'm the parent!\n");
}

kunigami

getaddrinfo("www.example.com", "3490", &hints, &res);
sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
connect(sockfd, res->ai_addr, res->ai_addrlen);

kunigami

hints.ai_family = AF_INET6; 
hints.ai_socktype = SOCK_STREAM;
// Important! Fill in my IP for me
hints.ai_flags = AI_PASSIVE;

// Use the address from localhost
getaddrinfo(NULL, "3490", &hints, &res);
sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
bind(sockfd, res->ai_addr, res->ai_addrlen);

kunigami

getaddrinfo("www.example.com", "http", &hints, &res);
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);

kunigami

int status;
struct addrinfo hints;
struct addrinfo *servinfo;  // will point to the results

memset(&hints, 0, sizeof hints); // make sure the struct is empty
hints.ai_family = AF_INET6;      // IPv6
hints.ai_socktype = SOCK_STREAM; // TCP stream sockets
hints.ai_flags = AI_PASSIVE;     // fill in my IP for me

getaddrinfo("www.google.com", "https", &hints, &servinfo);

kunigami

void sigint_handler(int sig) {
    write(0, "Ahhh! SIGINT!\n", 14);
}

int main(void) {
    void sigint_handler(int sig); /* prototype */
    struct sigaction sa;

    sa.sa_handler = sigint_handler;
    sa.sa_flags = 0;

kunigami

# Python 3.7+
import asyncio

async def sleep(id):
    print("will sleep", id)
    await asyncio.sleep(4)
    print("slept", id)
    
async def main():
    await sleep(1)

kunigami

# Python 3.7+
import asyncio

async def sleep(id):
    print("will sleep", id)
    await asyncio.sleep(4)
    print("slept", id)

async def main():
    await asyncio.gather(sleep(1), sleep(2))

kunigami

async def generator_async():
    await generator2()
    await generator3()

kunigami

async def g_async():
    return 10

# <class 'coroutine'>
print(type(g_async()))

def g_coro():
    yield 10
    
# <class 'generator'>