utils.h

#pragma once
#include<string>
using std::string;

/*
void error_handling(const char *message) {
    fputs(message, stderr);
    fputc('\n', stderr);
    exit(1);
}

int setnonblocking(int fd) {
    int old_option = fcntl(fd, F_GETFL);
    fcntl(fd, F_SETFL, old_option | O_NONBLOCK);
    return old_option;
}

void addfd(int epollfd, int fd, bool oneshot = true) {
    epoll_event event;
    event.data.fd = fd;
    event.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
    if (oneshot) {
        event.events |= EPOLLONESHOT;
    }
    epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &event);
    setnonblocking(fd);
}

void removefd(int epollfd, int fd) {
    epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, NULL);
    close(fd);
}

void modfd(int epollfd, int fd, int ev) {
    epoll_event event;
    event.data.fd = fd;
    event.events = EPOLLRDHUP | EPOLLET | EPOLLONESHOT | ev;
    epoll_ctl(epollfd, EPOLL_CTL_MOD, fd, &event);
}

void addSig(int sig, void(handler)(int), bool restart = true) {
    struct sigaction sa;
    memset(&sa, '\0', sizeof(sa));
    sa.sa_handler = handler;
    if (restart) {
        sa.sa_flags |= SA_RESTART;
    }
    sigfillset(&sa.sa_mask);
    assert(sigaction(sig, &sa, NULL) != -1);
}
*/