69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
/*
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* \brief Signal-source interface
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* \author Norman Feske
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* \date 2010-02-03
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*
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* This file is only included by 'pd_session/pd_session.h' and relies
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* on the headers included there. It is a separate header file to make it
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* easily replaceable by a platform-specific implementation.
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*/
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/*
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* Copyright (C) 2010-2013 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__SIGNAL_SOURCE__SIGNAL_SOURCE_H_
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#define _INCLUDE__SIGNAL_SOURCE__SIGNAL_SOURCE_H_
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namespace Genode { class Signal_source; }
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/**
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* Blocking part of the PD-session interface
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*
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* The blocking 'wait_for_signal()' operation cannot be part of the
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* PD-session interface because otherwise, context allocations or
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* signal submissions would not be possible while blocking for signals.
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* Therefore, the blocking part is implemented as a kernel-specific
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* special case.
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*/
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struct Genode::Signal_source
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{
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class Signal
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{
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private:
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long _imprint;
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int _num;
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public:
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Signal(long imprint, int num) : _imprint(imprint), _num(num) { }
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Signal() : _imprint(0), _num(0) { }
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long imprint() { return _imprint; }
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int num() { return _num; }
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};
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virtual ~Signal_source() { }
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/**
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* Wait for signal
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*/
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virtual Signal wait_for_signal() = 0;
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/*********************
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** RPC declaration **
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*********************/
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GENODE_RPC(Rpc_wait_for_signal, Signal, wait_for_signal);
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GENODE_RPC_INTERFACE(Rpc_wait_for_signal);
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};
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#endif /* _INCLUDE__SIGNAL_SOURCE__SIGNAL_SOURCE_H_ */
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