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/*
* This File is part of Davix, The IO library for HTTP based protocols
* Copyright (C) CERN 2019
* Author: Georgios Bitzes <georgios.bitzes@cern.ch>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef DAVIX_TEST_EVENT_FD_HPP
#define DAVIX_TEST_EVENT_FD_HPP
#include <iostream>
#include <unistd.h>
#include <string.h>
#include <cstdlib>
#include <fcntl.h>
class EventFD {
public:
EventFD() {
int status = pipe(fildes);
if(status != 0) {
std::cerr << "davix: CRITICAL: Could not obtain file descriptors for EventFD class, errno = " << errno << std::endl;
std::abort();
}
for(size_t i = 0; i < 2; i++) {
int flags = fcntl(fildes[i], F_GETFL, 0);
int status = fcntl(fildes[i], F_SETFL, flags | O_NONBLOCK);
if(status != 0) {
std::cerr << "davix: CRITICAL: Could not set file descriptor as non-blocking" << std::endl;
std::abort();
}
}
}
~EventFD() {
close();
}
void close() {
::close(fildes[0]);
::close(fildes[1]);
}
void notify() {
char val = 1;
int rc = write(fildes[1], &val, sizeof(val));
if (rc != sizeof(val)) {
std::cerr << "davix: CRITICAL: could not write to EventFD pipe, return code "
<< rc << ": " << strerror(errno) << std::endl;
}
}
inline int getFD() const {
return fildes[0];
}
void clear() {
while(true) {
char buffer[128];
int rc = ::read(fildes[0], buffer, 64);
if(rc <= 0) {
break;
}
}
}
private:
int fildes[2];
};
#endif
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