void
Ipc_sender<Derived>::send_msg(Receiver *receiver)
{
set_receiver(receiver);
if (!Config::Irq_shortcut)
{
// in profile mode, don't optimize
// in non-profile mode, enqueue _after_ shortcut if still necessary
sender_enqueue(receiver->sender_list(), 255);
receiver->vcpu_set_irq_pending();
}
// if the thread is waiting for this interrupt, make it ready;
// this will cause it to run irq->receiver_ready(), which
// handles the rest
// XXX careful! This code may run in midst of an do_ipc()
// operation (or similar)!
if (Receiver::Rcv_state s = receiver->sender_ok(this))
{
Syscall_frame *dst_regs = derived()->transfer_msg(receiver);
if (derived()->requeue_sender())
{
sender_enqueue(receiver->sender_list(), 255);
receiver->vcpu_set_irq_pending();
}
// ipc completed
receiver->state_change_dirty(~Thread_ipc_mask, 0);
// in case a timeout was set
receiver->reset_timeout();
if (s == Receiver::Rs_ipc_receive)
{
if (handle_shortcut(dst_regs, receiver))
return;
}
// we don't need to manipulate the state in a safe way
// because we are still running with interrupts turned off
receiver->state_add_dirty(Thread_ready);
receiver->sched()->deblock(receiver->cpu());
return;
}
if (Config::Irq_shortcut)
{
// in profile mode, don't optimize
// in non-profile mode, enqueue after shortcut if still necessary
sender_enqueue(receiver->sender_list(), 255);
receiver->vcpu_set_irq_pending();
}
}
void Sender::sender_update_prio(P_LIST list, unsigned short newprio)
{
if(EXPECT_FALSE(sender_prio() == newprio))
return;
Lock_guard<Cpu_lock> guard (&cpu_lock);
if (!in_sender_list())
return;
sender_dequeue(list);
sender_enqueue(list, newprio);
}
