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hw: faster Kernel::Signal_receiver::_listen() 

ref #1096
This commit is contained in:
Martin Stein 2014-03-14 12:12:59 +01:00 committed by Norman Feske
parent 00708b6696
commit f0ac145471
1 changed files with 14 additions and 15 deletions
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29
base-hw/src/core/kernel/signal_receiver.h
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@ -386,22 +386,21 @@ class Kernel::Signal_receiver
{
while (1)
{
/* check if there are deliverable signal */
if (_deliver.empty()) return;
Signal_context * const c = _deliver.dequeue()->object();
/* check for deliverable signals and waiting handlers */
if (_deliver.empty() || _handlers.empty()) { return; }
/* if there is no handler re-enqueue context and exit */
if (_handlers.empty()) {
_deliver.enqueue(&c->_deliver_fe);
return;
}
/* delivery from context to handler */
Signal_handler * const h = _handlers.dequeue()->object();
Signal::Data data((Genode::Signal_context *)c->_imprint,
c->_submits);
h->_receiver = 0;
h->_receive_signal(&data, sizeof(data));
c->_delivered();
/* create a signal data-object */
typedef Genode::Signal_context * Signal_imprint;
auto const context = _deliver.dequeue()->object();
auto const imprint =
reinterpret_cast<Signal_imprint>(context->_imprint);
Signal::Data data(imprint, context->_submits);
/* communicate signal data to handler */
auto const handler = _handlers.dequeue()->object();
handler->_receiver = 0;
handler->_receive_signal(&data, sizeof(data));
context->_delivered();
}
}