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'Root::Unavailable', 'Service::Invalid_args', 'Service::Unavailable', and 'Local_service::Factory::Denied' types have been replaced by the single 'Service_denied' exception type defined in 'session/session.h'.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).
103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
/*
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* \brief Connection to ROM file service
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* \author Norman Feske
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* \date 2008-08-22
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*/
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/*
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* Copyright (C) 2008-2017 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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#ifndef _INCLUDE__ROM_SESSION__CONNECTION_H_
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#define _INCLUDE__ROM_SESSION__CONNECTION_H_
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#include <rom_session/client.h>
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#include <base/connection.h>
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#include <base/log.h>
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namespace Genode { class Rom_connection; }
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class Genode::Rom_connection : public Connection<Rom_session>,
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public Rom_session_client
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{
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public:
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class Rom_connection_failed : public Service_denied { };
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enum { RAM_QUOTA = 6*1024UL };
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private:
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Rom_session_capability _session(Parent &parent, char const *label)
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{
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return session("ram_quota=%ld, cap_quota=%ld, label=\"%s\"",
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RAM_QUOTA, CAP_QUOTA, label);
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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 label request label and name of ROM module
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*
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* \throw Rom_connection_failed
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*/
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Rom_connection(Env &env, const char *label)
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try :
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Connection<Rom_session>(env, _session(env.parent(), label)),
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Rom_session_client(cap())
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{ }
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catch (...) {
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error("Could not open ROM session for \"", label, "\"");
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throw Rom_connection_failed();
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}
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/**
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* Constructor
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*
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* \noapi
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* \deprecated Use the constructor with 'Env &' as first
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* argument instead
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*/
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Rom_connection(const char *label) __attribute__((deprecated))
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try :
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Connection<Rom_session>(_session(*env_deprecated()->parent(), label)),
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Rom_session_client(cap())
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{ }
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catch (...) {
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error("Could not open ROM session for \"", label, "\"");
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throw Rom_connection_failed();
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}
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/**
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* Constructor
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*
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* \noapi
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* \deprecated Use the constructor with 'Env &' as first
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* argument instead
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*
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* This version is deliberately used by functions that are marked as
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* deprecated. If such a function called directly the
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* __attribute__((deprecate)) version, we would always get a warning,
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* even if the outer deprecated function is not called.
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*
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* It will be removed as soon as they are gone.
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*/
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Rom_connection(bool, const char *label)
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try :
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Connection<Rom_session>(_session(*env_deprecated()->parent(), label)),
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Rom_session_client(cap())
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{ }
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catch (...) {
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error("Could not open ROM session for \"", label, "\"");
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throw Rom_connection_failed();
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}
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};
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#endif /* _INCLUDE__ROM_SESSION__CONNECTION_H_ */
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