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#include <Eris/Types.h>
#include <Eris/PollDefault.h>
#include <Eris/Exceptions.h>
#include <Eris/DeleteLater.h>
#include <Eris/Log.h>
#include <Eris/TimedEventService.h>
#include <skstream/skstream.h>
bool Eris::Poll::new_timeout_ = false;
Eris::Poll& Eris::Poll::instance()
{
if(!_inst)
_inst = new PollDefault();
return *_inst;
}
void Eris::Poll::setInstance(Poll* p)
{
if(_inst)
throw InvalidOperation("Can't set poll instance, already have one");
_inst = p;
}
Eris::Poll* Eris::Poll::_inst = 0;
namespace Eris {
class PollDataDefault : public PollData
{
public:
PollDataDefault(const PollDefault::MapType&, bool&, unsigned long);
virtual bool isReady(const basic_socket_stream*);
private:
typedef PollDefault::MapType::const_iterator _iter;
fd_set reading, writing;
SOCKET_TYPE maxfd;
};
} // namespace Eris
using namespace Eris;
PollDataDefault::PollDataDefault(const PollDefault::MapType& str,
bool &got_data, unsigned long msec_timeout) : maxfd(0)
{
FD_ZERO(&reading);
FD_ZERO(&writing);
got_data = false;
#ifndef _MSC_VER
for(_iter I = str.begin(); I != str.end(); ++I) {
#else
//MSVC stupidity fix
std::map<const basic_socket_stream*, Check> *str2 = const_cast<std::map<const basic_socket_stream*, Check>* >(&str);
for(_iter I = str2->begin(); I != str2->end(); ++I) {
#endif
SOCKET_TYPE fd = I->first->getSocket();
if(fd == INVALID_SOCKET) continue;
got_data = true;
if(I->second & Poll::READ)
FD_SET(fd, &reading);
if(I->second & Poll::WRITE)
FD_SET(fd, &writing);
if(fd > maxfd)
maxfd = fd;
}
if (!got_data) return;
struct timeval timeout = {msec_timeout / 1000, (msec_timeout % 1000) * 1000};
int retval = select(maxfd+1, &reading, &writing, NULL, &timeout);
if (retval < 0) {
warning() << "select() returned error: " << retval;
got_data = false;
}
got_data = (retval != 0);
}
bool PollDataDefault::isReady(const basic_socket_stream* str)
{
SOCKET_TYPE fd = str->getSocket();
return (fd != INVALID_SOCKET) && (fd <= maxfd)
&& (FD_ISSET(fd, &reading) || FD_ISSET(fd, &writing));
}
void PollDefault::doPoll(unsigned long timeout)
{
if(_streams.size() == 0)
return;
bool got_data;
PollDataDefault data(_streams, got_data, timeout);
if(got_data)
Ready.emit(data);
}
void PollDefault::poll(unsigned long timeout)
{
// This will throw if someone is using another kind
// of poll, and that's a good thing.
PollDefault &inst = dynamic_cast<PollDefault&>(Poll::instance());
// Prevent reentrancy
static bool already_polling = false;
assert(!already_polling);
already_polling = true;
try {
unsigned long wait_time = 0;
inst.new_timeout_ = false;
// This will only happen for timeout != 0
while(wait_time < timeout) {
inst.doPoll(wait_time);
timeout -= wait_time;
wait_time = TimedEventService::instance()->tick();
if(inst.new_timeout_) {
// Added a timeout, the time until it must be called
// may be shorter than wait_time
wait_time = 0;
inst.new_timeout_ = false;
}
}
inst.doPoll(timeout);
TimedEventService::instance()->tick();
execDeleteLaters();
// We're done, turn off the reentrancy prevention flag
assert(already_polling);
already_polling = false;
}
catch(...) {
already_polling = false;
throw;
}
}
void PollDefault::addStream(const basic_socket_stream* str, Check c)
{
assert(c && Poll::MASK);
if(!_streams.insert(std::make_pair(str, c)).second)
throw Eris::InvalidOperation("Duplicate streams in PollDefault");
}
void PollDefault::changeStream(const basic_socket_stream* str, Check c)
{
assert(c && Poll::MASK);
_iter i = _streams.find(str);
if(i == _streams.end())
throw Eris::InvalidOperation("Can't find stream in PollDefault");
i->second = c;
}
void PollDefault::removeStream(const basic_socket_stream* str)
{
if(_streams.erase(str) == 0)
throw Eris::InvalidOperation("Can't find stream in PollDefault");
}
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