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'Root::Unavailable', 'Service::Invalid_args', 'Service::Unavailable', and 'Local_service::Factory::Denied' types have been replaced by the single 'Service_denied' exception type defined in 'session/session.h'.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).
80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
/*
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* \brief Utility to parse IRQ session arguments
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* \author Alexander Boettcher
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* \date 2016-07-20
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*/
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/*
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* Copyright (C) 2016-2017 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 _CORE__INCLUDE__IRQ_ARGS_H_
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#define _CORE__INCLUDE__IRQ_ARGS_H_
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#include <base/log.h>
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#include <util/arg_string.h>
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#include <irq_session/irq_session.h>
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namespace Genode { class Irq_args; }
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class Genode::Irq_args
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{
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private:
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Irq_session::Trigger _irq_trigger;
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Irq_session::Polarity _irq_polarity;
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long _irq_number;
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public:
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Irq_args(const char * args)
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{
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_irq_number = Arg_string::find_arg(args, "irq_number").long_value(-1);
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long irq_trg = Arg_string::find_arg(args, "irq_trigger").long_value(-1);
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long irq_pol = Arg_string::find_arg(args, "irq_polarity").long_value(-1);
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switch (irq_trg) {
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case -1:
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case Irq_session::TRIGGER_UNCHANGED:
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_irq_trigger = Irq_session::TRIGGER_UNCHANGED;
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break;
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case Irq_session::TRIGGER_EDGE:
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_irq_trigger = Irq_session::TRIGGER_EDGE;
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break;
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case Irq_session::TRIGGER_LEVEL:
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_irq_trigger = Irq_session::TRIGGER_LEVEL;
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break;
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default:
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error("invalid trigger mode ", irq_trg, " specified for IRQ ",
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_irq_number);
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throw Service_denied();
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}
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switch (irq_pol) {
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case -1:
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case Irq_session::POLARITY_UNCHANGED:
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_irq_polarity = Irq_session::POLARITY_UNCHANGED;
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break;
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case Irq_session::POLARITY_HIGH:
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_irq_polarity = Irq_session::POLARITY_HIGH;
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break;
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case Irq_session::POLARITY_LOW:
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_irq_polarity = Irq_session::POLARITY_LOW;
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break;
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default:
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error("invalid polarity ", irq_pol, " specified for IRQ ",
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_irq_number);
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throw Service_denied();
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}
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}
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long irq_number() const { return _irq_number; }
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Irq_session::Trigger trigger() const { return _irq_trigger; }
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Irq_session::Polarity polarity() const { return _irq_polarity; }
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};
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#endif /* _CORE__INCLUDE__IRQ_ARGS_H_ */
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