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#include <sys/devpoll.h>
#include "mplexer.hh"
#include "sstuff.hh"
#include <iostream>
#include <unistd.h>
#include "misc.hh"
#include <boost/lexical_cast.hpp>
#include "syncres.hh"
#include "namespaces.hh"
using namespace std;
class DevPollFDMultiplexer : public FDMultiplexer
{
public:
DevPollFDMultiplexer();
virtual ~DevPollFDMultiplexer()
{
close(d_devpollfd);
}
virtual int run(struct timeval* tv);
virtual void addFD(callbackmap_t& cbmap, int fd, callbackfunc_t toDo, const funcparam_t& parameter);
virtual void removeFD(callbackmap_t& cbmap, int fd);
string getName()
{
return "/dev/poll";
}
private:
int d_devpollfd;
};
static FDMultiplexer* makeDevPoll()
{
return new DevPollFDMultiplexer();
}
static struct DevPollRegisterOurselves
{
DevPollRegisterOurselves() {
FDMultiplexer::getMultiplexerMap().insert(make_pair(0, &makeDevPoll)); // priority 0!
}
} doItDevPoll;
//int DevPollFDMultiplexer::s_maxevents=1024;
DevPollFDMultiplexer::DevPollFDMultiplexer()
{
d_devpollfd=open("/dev/poll", O_RDWR);
if(d_devpollfd < 0)
throw FDMultiplexerException("Setting up /dev/poll: "+stringerror());
}
void DevPollFDMultiplexer::addFD(callbackmap_t& cbmap, int fd, callbackfunc_t toDo, const funcparam_t& parameter)
{
accountingAddFD(cbmap, fd, toDo, parameter);
struct pollfd devent;
devent.fd=fd;
devent.events= (&cbmap == &d_readCallbacks) ? POLLIN : POLLOUT;
devent.revents = 0;
if(write(d_devpollfd, &devent, sizeof(devent)) != sizeof(devent)) {
cbmap.erase(fd);
throw FDMultiplexerException("Adding fd to /dev/poll/ set: "+stringerror());
}
}
void DevPollFDMultiplexer::removeFD(callbackmap_t& cbmap, int fd)
{
if(!cbmap.erase(fd))
throw FDMultiplexerException("Tried to remove unlisted fd "+lexical_cast<string>(fd)+ " from multiplexer");
struct pollfd devent;
devent.fd=fd;
devent.events= POLLREMOVE;
devent.revents = 0;
if(write(d_devpollfd, &devent, sizeof(devent)) != sizeof(devent)) {
cbmap.erase(fd);
throw FDMultiplexerException("Removing fd from epoll set: "+stringerror());
}
}
int DevPollFDMultiplexer::run(struct timeval* now)
{
if(d_inrun) {
throw FDMultiplexerException("FDMultiplexer::run() is not reentrant!\n");
}
struct dvpoll dvp;
dvp.dp_nfds = d_readCallbacks.size() + d_writeCallbacks.size();
dvp.dp_fds = new pollfd[dvp.dp_nfds];
dvp.dp_timeout = 500;
int ret=ioctl(d_devpollfd, DP_POLL, &dvp);
gettimeofday(now,0); // MANDATORY!
if(ret < 0 && errno!=EINTR)
throw FDMultiplexerException("/dev/poll returned error: "+stringerror());
if(ret < 1) // thanks AB!
return 0;
d_inrun=true;
for(int n=0; n < ret; ++n) {
d_iter=d_readCallbacks.find(dvp.dp_fds[n].fd);
if(d_iter != d_readCallbacks.end()) {
d_iter->second.d_callback(d_iter->first, d_iter->second.d_parameter);
continue; // so we don't refind ourselves as writable!
}
d_iter=d_writeCallbacks.find(dvp.dp_fds[n].fd);
if(d_iter != d_writeCallbacks.end()) {
d_iter->second.d_callback(d_iter->first, d_iter->second.d_parameter);
}
}
delete[] dvp.dp_fds;
d_inrun=false;
return 0;
}
#if 0
void acceptData(int fd, funcparam_t& parameter)
{
cout<<"Have data on fd "<<fd<<endl;
Socket* sock=funcparam_t_cast<Socket*>(parameter);
string packet;
IPEndpoint rem;
sock->recvFrom(packet, rem);
cout<<"Received "<<packet.size()<<" bytes!\n";
}
int main()
{
Socket s(InterNetwork, Datagram);
IPEndpoint loc("0.0.0.0", 2000);
s.bind(loc);
DevPollFDMultiplexer sfm;
sfm.addReadFD(s.getHandle(), &acceptData, &s);
for(int n=0; n < 100 ; ++n) {
sfm.run();
}
sfm.removeReadFD(s.getHandle());
sfm.removeReadFD(s.getHandle());
}
#endif
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