80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/*
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* \brief Implementation of the SIGNAL interface
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* \author Norman Feske
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* \author Stefan Kalkowski
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* \date 2009-08-11
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*/
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/*
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* Copyright (C) 2009-2012 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/printf.h>
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#include <base/cap_sel_alloc.h>
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#include <base/native_types.h>
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/* core includes */
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#include <signal_session_component.h>
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#include <cap_session_component.h>
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namespace Fiasco {
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#include <l4/sys/factory.h>
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#include <l4/sys/irq.h>
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}
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using namespace Genode;
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/*****************************
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** Signal-source component **
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*****************************/
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void Signal_source_component::submit(Signal_context_component *context,
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Ipc_ostream *ostream,
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int cnt)
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{
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/* enqueue signal to context */
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context->increment_signal_cnt(cnt);
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if (!context->is_enqueued()) {
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_signal_queue.enqueue(context);
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/* wake up client */
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Fiasco::l4_irq_trigger(_blocking_semaphore.dst());
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}
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}
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Signal_source::Signal Signal_source_component::wait_for_signal()
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{
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if (_signal_queue.empty()) {
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PWRN("unexpected call of wait_for_signal");
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return Signal(0, 0);
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}
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/* dequeue and return pending signal */
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Signal_context_component *context = _signal_queue.dequeue();
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Signal result(context->imprint(), context->cnt());
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context->reset_signal_cnt();
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return result;
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}
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Signal_source_component::Signal_source_component(Rpc_entrypoint *ep)
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: _entrypoint(ep)
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{
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using namespace Fiasco;
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unsigned long badge = Badge_allocator::allocator()->alloc();
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Native_thread_id irq = cap_alloc()->alloc_id(badge);
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l4_msgtag_t res = l4_factory_create_irq(L4_BASE_FACTORY_CAP, irq);
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if (l4_error(res))
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PERR("Allocation of irq object failed!");
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_blocking_semaphore = Native_capability(irq, badge);
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}
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