511acad507
This patch integrates three region maps into each PD session to reduce the session overhead and to simplify the PD creation procedure. Please refer to the issue cited below for an elaborative discussion. Note the API change: With this patch, the semantics of core's RM service have changed. Now, the service is merely a tool for creating and destroying managed dataspaces, which are rarely needed. Regular components no longer need a RM session. For this reason, the corresponding argument for the 'Process' and 'Child' constructors has been removed. The former interface of the 'Rm_session' is not named 'Region_map'. As a minor refinement, the 'Fault_type' enum values are now part of the 'Region_map::State' struct. Issue #1938
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
/*
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* \brief PD root interface
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* \author Christian Helmuth
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* \date 2006-07-17
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*/
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/*
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* Copyright (C) 2006-2013 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__PD_ROOT_H_
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#define _CORE__INCLUDE__PD_ROOT_H_
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/* Genode */
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#include <root/component.h>
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/* Core */
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#include <pd_session_component.h>
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namespace Genode {
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class Pd_root;
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}
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class Genode::Pd_root : public Genode::Root_component<Genode::Pd_session_component>
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{
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private:
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Rpc_entrypoint &_thread_ep;
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Pager_entrypoint &_pager_ep;
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Allocator &_md_alloc;
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protected:
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Pd_session_component *_create_session(const char *args)
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{
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/* XXX use separate entrypoint for PD sessions */
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return new (md_alloc()) Pd_session_component(_thread_ep,
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_thread_ep,
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_thread_ep,
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_md_alloc,
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_pager_ep, args);
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}
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void _upgrade_session(Pd_session_component *p, const char *args)
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{
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size_t ram_quota =
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Arg_string::find_arg(args, "ram_quota").ulong_value(0);
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p->upgrade_ram_quota(ram_quota);
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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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* \param session_ep entry point for managing pd session objects
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* \param thread_ep entry point for managing threads
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* \param md_alloc meta-data allocator to be used by root component
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*/
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Pd_root(Rpc_entrypoint *session_ep,
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Rpc_entrypoint *thread_ep,
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Pager_entrypoint &pager_ep,
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Allocator *md_alloc)
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: Root_component<Pd_session_component>(session_ep, md_alloc),
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_thread_ep(*thread_ep), _pager_ep(pager_ep), _md_alloc(*md_alloc) { }
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};
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#endif /* _CORE__INCLUDE__PD_ROOT_H_ */
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