int32_t Process(socket_t s)
{
_recv(s);
_send(s);
int32_t read_active = s->readable && !LINK_LIST_IS_EMPTY(s->pending_recv);
int32_t write_active = s->writeable && !LINK_LIST_IS_EMPTY(s->pending_send);
return (read_active || write_active) && s->isactived == 0;
}
void on_write_active(socket_t s)
{
s->writeable = 1;
if(!s->isactived && !LINK_LIST_IS_EMPTY(s->pending_send))
{
s->isactived = 1;
double_link_push(s->engine->actived,(struct double_link_node*)s);
}
}
int32_t epoll_loop(engine_t n,int32_t timeout)
{
assert(n);
uint32_t ms;
uint32_t tick = GetSystemMs();
uint32_t _timeout = tick + timeout;
do{
while(!LINK_LIST_IS_EMPTY(n->actived))
{
socket_t s = LINK_LIST_POP(socket_t,n->actived);
s->isactived = 0;
if(Process(s) && s->isactived == 0)
{
s->isactived = 1;
LINK_LIST_PUSH_BACK(n->actived,s);
}
}
ms = _timeout - tick;
int32_t nfds = TEMP_FAILURE_RETRY(epoll_wait(n->poller_fd,n->events,MAX_SOCKET,ms));
if(nfds < 0)
return -1;
int32_t i;
for(i = 0 ; i < nfds ; ++i)
{
socket_t sock = (socket_t)n->events[i].data.ptr;
if(sock)
{
//套接口可读
if(n->events[i].events & EPOLLIN)
{
on_read_active(sock);
}
//套接口可写
if(n->events[i].events & EPOLLOUT)
on_write_active(sock);
if(n->events[i].events & EPOLLERR)
{
//套接口异常
}
}
}
tick = GetSystemMs();
}while(tick < _timeout);
return 0;
}