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/*
* FdManager.cpp
*
* Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "FdManager.h"
#include "ThreadManager.h"
#include <signal.h>
#include <unistd.h>
#include <sys/fcntl.h>
namespace Mad {
namespace Net {
FdManager FdManager::fdManager;
FdManager::FdManager() : running(false) {
pipe(interruptPipe);
int flags = fcntl(interruptPipe[0], F_GETFL, 0);
fcntl(interruptPipe[0], F_SETFL, flags | O_NONBLOCK);
flags = fcntl(interruptPipe[1], F_GETFL, 0);
fcntl(interruptPipe[1], F_SETFL, flags | O_NONBLOCK);
registerFd(interruptPipe[0], boost::bind(&FdManager::readInterrupt, this), POLLIN);
}
FdManager::~FdManager() {
unregisterFd(interruptPipe[0]);
close(interruptPipe[0]);
close(interruptPipe[1]);
}
bool FdManager::registerFd(int fd, const boost::function1<void, short> &handler, short events) {
struct pollfd pollfd = {fd, events, 0};
boost::lock(handlerLock, eventLock);
pollfds.insert(std::make_pair(fd, pollfd));
bool ret = handlers.insert(std::make_pair(fd, handler)).second;
eventLock.unlock();
handlerLock.unlock();
interrupt();
return ret;
}
bool FdManager::unregisterFd(int fd) {
boost::lock(handlerLock, eventLock);
pollfds.erase(fd);
bool ret = handlers.erase(fd);
eventLock.unlock();
handlerLock.unlock();
interrupt();
return ret;
}
bool FdManager::setFdEvents(int fd, short events) {
boost::unique_lock<boost::shared_mutex> lock(eventLock);
std::map<int, struct pollfd>::iterator pollfd = pollfds.find(fd);
if(pollfd == pollfds.end())
return false;
if(pollfd->second.events != events) {
pollfd->second.events = events;
interrupt();
}
return true;
}
short FdManager::getFdEvents(int fd) {
boost::shared_lock<boost::shared_mutex> lock(eventLock);
std::map<int, struct pollfd>::const_iterator pollfd = pollfds.find(fd);
if(pollfd == pollfds.end())
return -1;
return pollfd->second.events;
}
void FdManager::readInterrupt() {
char buf[20];
while(read(interruptPipe[0], buf, sizeof(buf)) > 0) {}
}
void FdManager::interrupt() {
char buf = 0;
write(interruptPipe[1], &buf, sizeof(buf));
}
void FdManager::ioThread() {
runLock.lock();
running = true;
runLock.unlock_and_lock_shared();
while(running) {
runLock.unlock_shared();
handlerLock.lock_shared();
eventLock.lock_shared();
readInterrupt();
size_t count = pollfds.size();
struct pollfd *fdarray = new struct pollfd[count];
std::map<int, struct pollfd>::iterator pollfd = pollfds.begin();
for(size_t n = 0; n < count; ++n) {
fdarray[n] = pollfd->second;
++pollfd;
}
eventLock.unlock_shared();
handlerLock.unlock_shared();
if(poll(fdarray, count, -1) > 0) {
handlerLock.lock_shared();
std::queue<boost::function0<void> > calls;
for(size_t n = 0; n < count; ++n) {
if(fdarray[n].revents)
calls.push(boost::bind(handlers[fdarray[n].fd], fdarray[n].revents));
}
handlerLock.unlock_shared();
while(!calls.empty()) {
calls.front()();
calls.pop();
}
}
delete [] fdarray;
runLock.lock_shared();
}
runLock.unlock_shared();
}
}
}
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