136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
/*
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* \brief Signal service
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* \author Norman Feske
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* \date 2009-08-05
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*/
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/*
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* Copyright (C) 2009-2013 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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#ifndef _CORE__INCLUDE__SIGNAL_SESSION_COMPONENT_H_
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#define _CORE__INCLUDE__SIGNAL_SESSION_COMPONENT_H_
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#include <signal_session/signal_session.h>
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#include <signal_session/source_rpc_object.h>
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#include <base/allocator_guard.h>
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#include <base/tslab.h>
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#include <base/lock.h>
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#include <base/rpc_client.h>
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#include <base/rpc_server.h>
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#include <util/fifo.h>
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#include <base/signal.h>
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namespace Genode {
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class Signal_source_component;
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class Signal_context_component;
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typedef Fifo<Signal_context_component> Signal_queue;
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class Signal_context_component : public Object_pool<Signal_context_component>::Entry
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{
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public:
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/**
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* Constructor
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*/
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Signal_context_component(Signal_context_capability cap)
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: Object_pool<Signal_context_component>::Entry(cap) { }
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};
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class Signal_source_component : public Signal_source_rpc_object
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{
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public:
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/**
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* Constructor
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*/
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Signal_source_component(Rpc_entrypoint *) { }
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/*****************************
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** Signal-source interface **
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*****************************/
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Signal wait_for_signal() { return Signal(0, 0); }
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};
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class Signal_session_component : public Rpc_object<Signal_session>
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{
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private:
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Rpc_entrypoint *_source_ep;
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Object_pool<Signal_context_component> _signal_queue;
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Signal_source_component _source;
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Signal_source_capability _source_cap;
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Allocator_guard _md_alloc;
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Tslab<Signal_context_component,
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960*sizeof(long)> _contexts_slab;
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Ipc_ostream *_ipc_ostream;
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public:
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/**
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* Constructor
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*
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* \param source_ep entrypoint holding signal-source component
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* objects
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* \param context_ep global pool of all signal contexts
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* \param md_alloc backing-store allocator for
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* signal-context component objects
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*
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* To maintain proper synchronization, 'signal_source_ep' must be
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* the same entrypoint as used for the signal-session component.
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* The 'signal_context_ep' is only used for associative array
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* to map signal-context capabilities to 'Signal_context_component'
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* objects and as capability allocator for such objects.
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*/
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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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~Signal_session_component();
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/**
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* Register quota donation at allocator guard
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*/
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void upgrade_ram_quota(size_t ram_quota) { _md_alloc.upgrade(ram_quota); }
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/******************************
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** Signal-session interface **
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******************************/
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Signal_source_capability signal_source();
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Signal_context_capability alloc_context(long imprint);
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void free_context(Signal_context_capability context_cap);
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void submit(Signal_context_capability context_cap, unsigned cnt);
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/**************************
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** Rpc_object interface **
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**************************/
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Rpc_exception_code dispatch(int opcode, Ipc_istream &is, Ipc_ostream &os)
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{
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/*
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* Make IPC output stream available to the submit function. The
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* stream is used to carry signal payload for the out-of-order
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* handling of 'wait_for_signal' replies.
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*/
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_ipc_ostream = &os;
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/* dispatch RPC */
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return Rpc_object<Signal_session>::dispatch(opcode, is, os);
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}
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};
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}
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#endif /* _CORE__INCLUDE__CAP_SESSION_COMPONENT_H_ */
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