120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
/*
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* \brief Implementation of the SIGNAL service on the HW-core
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* \author Martin Stein
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* \date 2012-05-05
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*/
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/*
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* Copyright (C) 2012-2013 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 <unmanaged_singleton.h>
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/* base-hw includes */
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#include <kernel/core_interface.h>
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/* core includes */
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#include <signal_session_component.h>
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using namespace Genode;
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Signal_session_component::Receiver::Receiver()
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: Kernel_object<Kernel::Signal_receiver>(true),
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Signal_session_component::Receiver::Pool::Entry(Kernel_object<Kernel::Signal_receiver>::_cap) { }
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Signal_session_component::Context::Context(Signal_session_component::Receiver &r,
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unsigned const imprint)
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: Kernel_object<Kernel::Signal_context>(true, r.kernel_object(), imprint),
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Signal_session_component::Context::Pool::Entry(Kernel_object<Kernel::Signal_context>::_cap) { }
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Signal_receiver_capability Signal_session_component::alloc_receiver()
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{
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try {
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Receiver * r = new (_receivers_slab) Receiver();
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_receivers.insert(r);
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return reinterpret_cap_cast<Signal_receiver>(r->cap());
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} catch (Allocator::Out_of_memory&) {
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PERR("failed to allocate signal-receiver resources");
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throw Out_of_metadata();
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}
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return reinterpret_cap_cast<Signal_receiver>(Untyped_capability());
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}
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void Signal_session_component::free_receiver(Signal_receiver_capability cap)
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{
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/* look up ressource info */
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Receiver::Pool::Guard r(_receivers.lookup_and_lock(cap));
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if (!r) {
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PERR("unknown signal receiver");
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throw Kill_receiver_failed();
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}
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/* release resources */
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_receivers.remove_locked(r);
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destroy(&_receivers_slab, r.object());
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}
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Signal_context_capability
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Signal_session_component::alloc_context(Signal_receiver_capability src,
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unsigned const imprint)
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{
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/* look up ressource info */
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Receiver::Pool::Guard r(_receivers.lookup_and_lock(src));
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if (!r) {
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PERR("unknown signal receiver");
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throw Create_context_failed();
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}
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try {
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Context * c = new (_contexts_slab) Context(*r.object(), imprint);
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_contexts.insert(c);
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return reinterpret_cap_cast<Signal_context>(c->cap());
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} catch (Allocator::Out_of_memory&) {
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PERR("failed to allocate signal-context resources");
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throw Out_of_metadata();
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}
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return reinterpret_cap_cast<Signal_context>(Untyped_capability());
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}
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void Signal_session_component::free_context(Signal_context_capability cap)
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{
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/* look up ressource info */
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Context::Pool::Guard c(_contexts.lookup_and_lock(cap));
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if (!c) {
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PERR("unknown signal context");
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throw Kill_context_failed();
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}
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/* release resources */
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_contexts.remove_locked(c);
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destroy(&_contexts_slab, c.object());
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}
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Signal_session_component::Signal_session_component(Allocator * const allocator,
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size_t const quota)
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: _allocator(allocator, quota), _receivers_slab(&_allocator),
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_contexts_slab(&_allocator) { }
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Signal_session_component::~Signal_session_component()
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{
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while (Context * const c = _contexts.first_locked()) {
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_contexts.remove_locked(c);
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destroy(&_contexts_slab, c);
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}
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while (Receiver * const r = _receivers.first_locked()) {
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_receivers.remove_locked(r);
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destroy(&_receivers_slab, r);
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}
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}
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