114 lines
2.5 KiB
C++
114 lines
2.5 KiB
C++
/*
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* \brief Pseudo launcher for the Genode version of Scout
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* \author Norman Feske
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* \date 2006-08-28
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*/
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/*
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* Copyright (C) 2006-2017 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 Affero General Public License version 3.
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*/
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#include <base/env.h>
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#include <base/attached_rom_dataspace.h>
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#include <launchpad/launchpad.h>
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#include "elements.h"
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using namespace Genode;
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using namespace Scout;
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/* initialized by 'Launcher::init' */
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static Launchpad *_launchpad_ptr;
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static Allocator *_alloc_ptr;
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static Env *_env_ptr;
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/**********************************************
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** Registry containing child configurations **
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**********************************************/
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/**
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* The registry contains config dataspaces for given program names. It is
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* filled lazily as a side effect of 'Launcher::launch()'.
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*/
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class Config_registry
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{
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private:
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struct Entry;
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List<Entry> _configs { };
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public:
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/**
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* Obtain configuration for specified program name from ROM module
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* named '<prg_name>.config'
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*/
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Dataspace_capability config(char const *name);
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};
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struct Config_registry::Entry : List<Config_registry::Entry>::Element
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{
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String<128> const name;
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Constructible<Attached_rom_dataspace> dataspace { };
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Dataspace_capability ds_cap { };
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Entry(char const *prg_name) : name(prg_name)
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{
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try {
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dataspace.construct(*_env_ptr, String<256>(name, ".config").string());
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ds_cap = dataspace->cap();
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}
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catch (...) { }
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}
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};
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Dataspace_capability Config_registry::config(char const *name)
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{
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/* lookup existing configuration */
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for (Entry *e = _configs.first(); e; e = e->next())
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if (e->name == name)
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return e->ds_cap;
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/* if lookup failed, create and register new config */
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Entry *entry = new (*_alloc_ptr) Entry(name);
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_configs.insert(entry);
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return entry->ds_cap;
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}
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/************************
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** Launcher interface **
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************************/
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void Launcher::init(Genode::Env &env, Allocator &alloc)
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{
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static Launchpad launchpad(env, env.pd().avail_ram().value);
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_launchpad_ptr = &launchpad;
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_alloc_ptr = &alloc;
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_env_ptr = &env;
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}
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void Launcher::launch()
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{
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static Config_registry config_registry;
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if (!_launchpad_ptr) {
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class Missing_launchpad_init_call { };
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throw Missing_launchpad_init_call();
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}
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_launchpad_ptr->start_child(prg_name(),
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Launchpad::Cap_quota{caps()},
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Launchpad::Ram_quota{quota()},
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config_registry.config(prg_name().string()));
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}
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