54 lines
1005 B
C++
54 lines
1005 B
C++
/*
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* \brief Input-interrupt handler
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* \author Josef Soentgen
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* \date 2015-04-08
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*/
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/*
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* Copyright (C) 2015-2017 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 _IRQ_HANDLER_H_
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#define _IRQ_HANDLER_H_
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/* Genode includes */
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#include <irq_session/connection.h>
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class Irq_handler
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{
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private:
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Genode::Env &_env;
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Genode::Irq_connection _irq;
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Genode::Signal_handler<Irq_handler> _handler;
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unsigned _sem_cnt = 1;
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void _handle() { _sem_cnt = 0; }
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public:
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Irq_handler(Genode::Env &env, int irq_number)
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:
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_env(env), _irq(env, irq_number),
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_handler(env.ep(), *this, &Irq_handler::_handle)
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{
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_irq.sigh(_handler);
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_irq.ack_irq();
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}
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void wait()
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{
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_sem_cnt++;
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while (_sem_cnt > 0)
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_env.ep().wait_and_dispatch_one_io_signal();
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}
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void ack() { _irq.ack_irq(); }
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};
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#endif /* _IRQ_HANDLER_H_ */
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