74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
/*
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* \brief Signal-source server 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 'signal_session/server.h' and relies on the
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* headers included there. No include guards are needed. It is a separate
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* header file to make it easily replaceable by a platform-specific
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* 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_SESSION__SOURCE_SERVER_H_
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#define _INCLUDE__SIGNAL_SESSION__SOURCE_SERVER_H_
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#include <base/rpc_server.h>
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#include <signal_session/nova_source.h>
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namespace Genode { struct Signal_source_rpc_object; }
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struct Genode::Signal_source_rpc_object : Rpc_object<Nova_signal_source,
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Signal_source_rpc_object>
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{
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private:
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Native_capability _blocking_semaphore;
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bool _missed_wakeup;
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protected:
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void _wakeup_client()
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{
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if (!_blocking_semaphore.valid()) {
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_missed_wakeup = true;
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return;
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}
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if (_missed_wakeup)
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_missed_wakeup = false;
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/* wake up client */
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uint8_t res = Nova::sm_ctrl(_blocking_semaphore.local_name(),
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Nova::SEMAPHORE_UP);
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if (res != Nova::NOVA_OK) {
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PWRN("%s - signal delivery failed - error %x",
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__func__, res);
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_missed_wakeup = true;
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}
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}
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public:
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void _register_semaphore(Native_capability const &cap)
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{
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if (_blocking_semaphore.valid())
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PWRN("overwritting blocking signal semaphore !!!");
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_blocking_semaphore = cap;
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if (_missed_wakeup)
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_wakeup_client();
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}
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Signal_source_rpc_object() : _missed_wakeup(false) {}
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};
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#endif /* _INCLUDE__SIGNAL_SESSION__SOURCE_SERVER_H_ */
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