4d442bca30
This patch reduces the number of exception types by facilitating globally defined exceptions for common usage patterns shared by most services. In particular, RPC functions that demand a session-resource upgrade not longer reflect this condition via a session-specific exception but via the 'Out_of_ram' or 'Out_of_caps' types. Furthermore, the 'Parent::Service_denied', 'Parent::Unavailable', 'Root::Invalid_args', 'Root::Unavailable', 'Service::Invalid_args', 'Service::Unavailable', and 'Local_service::Factory::Denied' types have been replaced by the single 'Service_denied' exception type defined in 'session/session.h'. This consolidation eases the error handling (there are fewer exceptions to handle), alleviates the need to convert exceptions along the session-creation call chain, and avoids possible aliasing problems (catching the wrong type with the same name but living in a different scope).
42 lines
1009 B
C++
42 lines
1009 B
C++
/*
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* \brief Core implementation of the ROM session interface
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* \author Norman Feske
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* \date 2006-07-06
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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 <util/arg_string.h>
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#include <rom_session_component.h>
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#include <root/root.h>
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using namespace Genode;
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Rom_session_component::Rom_session_component(Rom_fs *rom_fs,
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Rpc_entrypoint *ds_ep,
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const char *args)
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:
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_rom_module(_find_rom(rom_fs, args)),
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_ds(_rom_module ? _rom_module->size : 0,
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_rom_module ? _rom_module->addr : 0, CACHED, false, 0),
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_ds_ep(ds_ep)
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{
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/* ROM module not found */
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if (!_rom_module)
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throw Service_denied();
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_ds_cap = static_cap_cast<Rom_dataspace>(_ds_ep->manage(&_ds));
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}
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Rom_session_component::~Rom_session_component()
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{
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_ds_ep->dissolve(&_ds);
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}
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