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/*
* select
*/
#include <sys/select.h>
#include <vdr/plugin.h>
#include <vdr/timers.h>
#include "sock.h"
#include "select.h"
#include "handler.h"
#include "helpers.h"
struct node
{
cVdrmanagerClientSocket * socket;
node * next;
};
cSelect::cSelect()
{
serversocket = NULL;
clientsockets = NULL;
clientsocketcount = 0;
handler = new cHandler;
pollfds = NULL;
stopped = false;
nexttimer = 0;
shutdown = 0;
}
cSelect::~cSelect()
{
if (serversocket)
delete serversocket;
while(clientsockets)
{
node * next = clientsockets->next;
delete clientsockets->socket;
delete clientsockets;
clientsockets = next;
}
if (handler)
delete handler;
if (pollfds)
delete pollfds;
}
void cSelect::SetServerSocket(cVdrmanagerServerSocket * sock)
{
serversocket = sock;
}
void cSelect::AddClientSocket(cVdrmanagerClientSocket * sock)
{
// remember socket
node * newnode = new node;
newnode->next = clientsockets;
newnode->socket = sock;
clientsockets = newnode;
clientsocketcount++;
}
void cSelect::RemoveClientSocket(cVdrmanagerClientSocket * sock)
{
node * curnode = clientsockets;
node * lastnode = NULL;
while(curnode)
{
if (curnode->socket == sock)
{
// unlink node
if (lastnode)
lastnode->next = curnode->next;
else
clientsockets = curnode->next;
// free socket and node
delete curnode->socket;
delete curnode;
clientsocketcount--;
break;
}
lastnode = curnode;
curnode = curnode->next;
}
if (clientsockets)
{
curnode = clientsockets;
while (curnode)
{
curnode = curnode->next;
}
}
}
cVdrmanagerClientSocket * cSelect::GetClientSocket(int sock)
{
node * curnode = clientsockets;
while (curnode)
{
if (curnode->socket->GetSocket() == sock)
return curnode->socket;
curnode = curnode->next;
}
return NULL;
}
bool cSelect::Action()
{
for(;!stopped;)
{
if (!Poll())
return false;
}
return true;
}
void cSelect::CreatePollfds()
{
// construct pollfd array
// we need one pollfd for the eventpipe,
// the serversocket and each clientsocket
pollfds = new struct pollfd[clientsocketcount+1];
pollfds[0].fd = serversocket->GetSocket();
pollfds[0].events = POLLIN;
node * curnode = clientsockets;
int i = 1;
while (curnode)
{
pollfds[i].fd = curnode->socket->GetSocket();
pollfds[i].events = POLLIN;
if (curnode->socket->WritePending())
pollfds[i].events |= POLLOUT;
pollfds[i++].revents = 0;
curnode = curnode->next;
}
}
bool cSelect::Poll()
{
// poll for events
CreatePollfds();
int rc = poll(pollfds, clientsocketcount+1, -1);
if (rc < 0)
{
LOG_ERROR;
delete pollfds;
return false;
}
// timeout?
if (rc == 0)
return true;
// client requests or outstanding writes
for(int i = 1; i < clientsocketcount+1; i++)
{
cVdrmanagerClientSocket * sock = GetClientSocket(pollfds[i].fd);
if (sock)
{
if (pollfds[i].revents & (POLLIN|POLLHUP))
{
// client request
handler->HandleClientRequest(sock);
// disconnect?
if (sock->Disconnected())
{
RemoveClientSocket(sock);
}
}
else if (pollfds[i].revents & POLLOUT)
{
// possibly outstanding writes
sock->Flush();
}
}
}
// new client?
if (pollfds[0].revents & POLLIN)
{
// get client socket
cVdrmanagerClientSocket * sock = serversocket->Accept();
if (sock)
{
// Add client socket
AddClientSocket(sock);
// Send current data
handler->HandleNewClient(sock);
}
}
delete pollfds;
return true;
}
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