102 lines
2.5 KiB
C++
102 lines
2.5 KiB
C++
/*
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* \brief Implementation of the SIGNAL interface
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* \author Norman Feske
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* \date 2009-08-11
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*/
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/*
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* Copyright (C) 2009-2011 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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/* core includes */
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#include <signal_session_component.h>
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using namespace Genode;
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/******************************
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** Signal-session component **
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******************************/
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Signal_session_component::Signal_session_component(Rpc_entrypoint *source_ep,
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Rpc_entrypoint *context_ep,
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Allocator *context_md_alloc,
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size_t ram_quota)
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:
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_source_ep(source_ep),
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_context_ep(context_ep),
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_source(source_ep),
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_source_cap(_source_ep->manage(&_source)),
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_md_alloc(context_md_alloc, ram_quota),
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_contexts_slab(&_md_alloc)
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{ }
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Signal_session_component::~Signal_session_component()
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{
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/* free all signal contexts */
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while (Signal_context_component *r = _contexts_slab.first_object())
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free_context(r->cap());
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/* remove _signal_source from entrypoint */
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_source_ep->dissolve(&_source);
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}
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Signal_source_capability Signal_session_component::signal_source()
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{
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return _source_cap;
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}
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Signal_context_capability Signal_session_component::alloc_context(long imprint)
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{
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Signal_context_component *context;
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try { context = new (&_contexts_slab)
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Signal_context_component(imprint, &_source); }
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catch (Allocator::Out_of_memory) { throw Out_of_metadata(); }
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/* return unique capability for the signal context */
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return _context_ep->manage(context);
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}
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void Signal_session_component::free_context(Signal_context_capability context_cap)
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{
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Signal_context_component *context;
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context = dynamic_cast<Signal_context_component *>
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(_context_ep->obj_by_cap(context_cap));
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if (!context) {
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PWRN("specified signal-context capability has wrong type");
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return;
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}
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_context_ep->dissolve(context);
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destroy(&_contexts_slab, context);
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}
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void Signal_session_component::submit(Signal_context_capability context_cap,
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unsigned cnt)
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{
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Signal_context_component *context;
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context = dynamic_cast<Signal_context_component *>
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(_context_ep->obj_by_cap(context_cap));
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if (!context) {
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PWRN("invalid signal-context capability");
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return;
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}
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context->source()->submit(context, _ipc_ostream, cnt);
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}
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