104 lines
2.1 KiB
C++
104 lines
2.1 KiB
C++
/*
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* \brief Client-side VM session exception handler
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* \author Alexander Boettcher
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* \date 2018-09-29
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*/
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/*
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* Copyright (C) 2018 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 _INCLUDE__VM_SESSION__HANDLER_H_
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#define _INCLUDE__VM_SESSION__HANDLER_H_
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#include <base/signal.h>
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namespace Genode {
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class Vm_state;
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class Vm_handler_base;
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template <typename, typename> class Vm_handler;
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}
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class Genode::Vm_handler_base : public Signal_dispatcher_base
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{
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friend class Vm_session_client;
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protected:
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Rpc_entrypoint &_rpc_ep;
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Signal_context_capability _cap {};
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Genode::Semaphore _done { 0 };
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public:
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virtual bool config_vm_event(Genode::Vm_state &, unsigned) = 0;
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Vm_handler_base(Rpc_entrypoint &rpc)
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: _rpc_ep(rpc) { }
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};
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template <typename T, typename EP = Genode::Entrypoint>
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class Genode::Vm_handler : public Vm_handler_base
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{
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private:
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EP &_ep;
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T &_obj;
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void (T::*_member) ();
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void (T::*_config) (Genode::Vm_state &, unsigned const);
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/*
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* Noncopyable
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*/
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Vm_handler(Vm_handler const &);
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Vm_handler &operator = (Vm_handler const &);
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public:
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/**
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* Constructor
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*
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* \param obj,member object and method to call when
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* the vm exception occurs
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*/
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Vm_handler(EP &ep, T &obj, void (T::*member)(),
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void (T::*config)(Genode::Vm_state&, unsigned) = nullptr)
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:
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Vm_handler_base(ep.rpc_ep()),
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_ep(ep),
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_obj(obj),
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_member(member),
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_config(config)
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{
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_cap = ep.manage(*this);
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}
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~Vm_handler() { _ep.dissolve(*this); }
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/**
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* Interface of Signal_dispatcher_base
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*/
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void dispatch(unsigned) override
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{
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(_obj.*_member)();
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_done.up();
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}
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bool config_vm_event(Genode::Vm_state &state,
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unsigned const vm_event) override
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{
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if (!_config)
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return false;
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(_obj.*_config)(state, vm_event);
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return true;
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}
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operator Capability<Signal_context>() const { return _cap; }
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};
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#endif /* _INCLUDE__VM_SESSION__HANDLER_H_ */
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