56 lines
1.0 KiB
C
56 lines
1.0 KiB
C
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/*
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* \brief File-system listener
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* \author Norman Feske
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* \date 2012-04-11
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*/
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#ifndef _FILE_SYSTEM__LISTENER_H_
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#define _FILE_SYSTEM__LISTENER_H_
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/* Genode includes */
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#include <file_system_session/file_system_session.h>
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#include <util/list.h>
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#include <base/lock.h>
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#include <base/signal.h>
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namespace File_system {
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class Listener : public Genode::List<Listener>::Element
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{
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private:
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Genode::Lock _lock;
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Genode::Signal_context_capability _sigh;
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bool _marked_as_updated;
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public:
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Listener() : _marked_as_updated(false) { }
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Listener(Signal_context_capability sigh)
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: _sigh(sigh), _marked_as_updated(false) { }
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void notify()
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{
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Genode::Lock::Guard guard(_lock);
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if (_marked_as_updated && _sigh.valid())
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Signal_transmitter(_sigh).submit();
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_marked_as_updated = false;
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}
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void mark_as_updated()
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{
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Genode::Lock::Guard guard(_lock);
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_marked_as_updated = true;
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}
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bool valid() const { return _sigh.valid(); }
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};
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}
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#endif /* _FILE_SYSTEM__LISTENER_H_ */
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