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#include <mutex>
#include <systemd/sd-event.h>
#include "application.hpp"
#include "../utils/signals.hpp"
#include "low-can-hat.hpp"
#include "../can/message/message.hpp"
#include "../can/can-bus.hpp"
///******************************************************************************
///
/// SystemD event loop Callbacks
///
///*******************************************************************************/
static void push_n_notify(std::shared_ptr<message_t> m)
{
can_bus_t& cbm = application_t::instance().get_can_bus_manager();
{
std::lock_guard<std::mutex> can_message_lock(cbm.get_can_message_mutex());
cbm.push_new_can_message(m);
}
cbm.get_new_can_message_cv().notify_one();
}
void on_no_clients(std::shared_ptr<low_can_subscription_t> can_subscription, uint32_t pid, std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
{
bool is_permanent_recurring_request = false;
if( ! can_subscription->get_diagnostic_message().empty() && can_subscription->get_diagnostic_message(pid) != nullptr)
{
DiagnosticRequest diag_req = can_subscription->get_diagnostic_message(pid)->build_diagnostic_request();
active_diagnostic_request_t* adr = application_t::instance().get_diagnostic_manager().find_recurring_request(diag_req);
if( adr != nullptr)
{
is_permanent_recurring_request = adr->get_permanent();
if(! is_permanent_recurring_request)
application_t::instance().get_diagnostic_manager().cleanup_request(adr, true);
}
}
if(! is_permanent_recurring_request)
on_no_clients(can_subscription, s);
}
void on_no_clients(std::shared_ptr<low_can_subscription_t> can_subscription, std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
{
auto it = s.find(can_subscription->get_index());
s.erase(it);
}
int read_message(sd_event_source *event_source, int fd, uint32_t revents, void *userdata)
{
low_can_subscription_t* can_subscription = (low_can_subscription_t*)userdata;
if ((revents & EPOLLIN) != 0)
{
utils::signals_manager_t& sm = utils::signals_manager_t::instance();
std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
if(can_subscription->get_index() != -1)
{
std::shared_ptr<utils::socketcan_t> s = can_subscription->get_socket();
if(s->socket() && s->socket() != -1)
{
std::shared_ptr<message_t> message = s->read_message();
// Sure we got a valid CAN message ?
if (! message->get_id() == 0 && ! message->get_length() == 0 && message->get_flags() & INVALID_FLAG)
push_n_notify(message);
}
}
}
// check if error or hangup
if ((revents & (EPOLLERR|EPOLLRDHUP|EPOLLHUP)) != 0)
{
sd_event_source_unref(event_source);
can_subscription->get_socket()->close();
}
return 0;
}
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