101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
/*
|
|
* \brief Implementation of the SIGNAL interface
|
|
* \author Norman Feske
|
|
* \author Stefan Kalkowski
|
|
* \date 2009-08-11
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2009-2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <base/printf.h>
|
|
#include <base/native_types.h>
|
|
|
|
/* core includes */
|
|
#include <platform.h>
|
|
#include <signal_source_component.h>
|
|
|
|
namespace Fiasco {
|
|
#include <l4/sys/factory.h>
|
|
#include <l4/sys/irq.h>
|
|
}
|
|
|
|
using namespace Genode;
|
|
|
|
|
|
/*****************************
|
|
** Signal-source component **
|
|
*****************************/
|
|
|
|
void Signal_source_component::release(Signal_context_component *context)
|
|
{
|
|
if (context && context->is_enqueued())
|
|
_signal_queue.remove(context);
|
|
}
|
|
|
|
void Signal_source_component::submit(Signal_context_component *context,
|
|
unsigned long cnt)
|
|
{
|
|
/* enqueue signal to context */
|
|
context->increment_signal_cnt(cnt);
|
|
|
|
if (!context->is_enqueued()) {
|
|
_signal_queue.enqueue(context);
|
|
|
|
/* wake up client */
|
|
Fiasco::l4_irq_trigger(_blocking_semaphore.dst());
|
|
}
|
|
}
|
|
|
|
|
|
Signal_source::Signal Signal_source_component::wait_for_signal()
|
|
{
|
|
if (_signal_queue.empty()) {
|
|
PWRN("unexpected call of wait_for_signal");
|
|
return Signal(0, 0);
|
|
}
|
|
|
|
/* dequeue and return pending signal */
|
|
Signal_context_component *context = _signal_queue.dequeue();
|
|
Signal result(context->imprint(), context->cnt());
|
|
context->reset_signal_cnt();
|
|
return result;
|
|
}
|
|
|
|
|
|
Signal_source_component::Signal_source_component(Rpc_entrypoint *ep)
|
|
:
|
|
Signal_source_rpc_object(cap_map()->insert(platform_specific()->cap_id_alloc()->alloc())),
|
|
_entrypoint(ep), _finalizer(*this),
|
|
_finalizer_cap(_entrypoint->manage(&_finalizer))
|
|
{
|
|
using namespace Fiasco;
|
|
|
|
l4_msgtag_t res = l4_factory_create_irq(L4_BASE_FACTORY_CAP,
|
|
_blocking_semaphore.dst());
|
|
if (l4_error(res))
|
|
PERR("Allocation of irq object failed!");
|
|
}
|
|
|
|
|
|
Signal_source_component::~Signal_source_component()
|
|
{
|
|
_finalizer_cap.call<Finalizer::Rpc_exit>();
|
|
_entrypoint->dissolve(&_finalizer);
|
|
}
|
|
|
|
|
|
void Signal_source_component::Finalizer_component::exit()
|
|
{
|
|
/*
|
|
* On Fiasco.OC, the signal-source client does not use a blocking call
|
|
* to wait for signals. Hence, we do not need to take care of
|
|
* releasing the reply capability of such a call.
|
|
*/
|
|
}
|