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#include "selector.h"
//SELECTOR
Selector::Selector()
{
FD_ZERO(&d_read);
FD_ZERO(&d_write);
FD_ZERO(&d_except);
noAlarm();
d_max = 0;
}
//=
//WAIT
int Selector::wait()
{
timeval t = d_alarm;
d_ret_read = d_read;
d_ret_write = d_write;
d_ret_except = d_except;
d_readidx = 0;
d_writeidx = 0;
d_exceptidx = 0;
d_ret = select(d_max, &d_ret_read, &d_ret_write, &d_ret_except,
t.tv_sec == -1 && t.tv_usec == -1 ? 0 : &t);
if (d_ret < 0)
throw "Selector::wait()/select() failed";
return d_ret;
}
//=
//ADDFD
void Selector::addFd(fd_set *set, int fd)
{
FD_SET(fd, set);
if (fd >= d_max)
d_max = fd + 1;
}
//=
//CHECKSET
int Selector::checkSet(int *index, fd_set &set)
{
int &idx = *index;
while (idx < d_max && !FD_ISSET(idx, &set))
++idx;
return idx == d_max ? -1 : idx++;
}
//=
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