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92 lines
2.0 KiB
C++
92 lines
2.0 KiB
C++
/*
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* \brief Client-side VM session vCPU exception handler
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* \author Alexander Boettcher
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* \author Christian Helmuth
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* \date 2018-09-29
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*/
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/*
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* Copyright (C) 2018-2021 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 Vcpu_state;
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class Vcpu_handler_base;
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template <typename, typename> class Vcpu_handler;
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}
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class Genode::Vcpu_handler_base : public Signal_dispatcher_base
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{
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protected:
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Rpc_entrypoint &_rpc_ep;
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Signal_context_capability _signal_cap { };
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Genode::Semaphore _ready_semaphore { 0 };
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public:
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Vcpu_handler_base(Rpc_entrypoint &rpc)
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: _rpc_ep(rpc) { }
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Rpc_entrypoint & rpc_ep() { return _rpc_ep; }
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Signal_context_capability signal_cap() { return _signal_cap; }
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Genode::Semaphore & ready_semaphore() { return _ready_semaphore; }
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};
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template <typename T, typename EP = Genode::Entrypoint>
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class Genode::Vcpu_handler : public Vcpu_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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/*
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* Noncopyable
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*/
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Vcpu_handler(Vcpu_handler const &);
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Vcpu_handler &operator = (Vcpu_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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Vcpu_handler(EP &ep, T &obj, void (T::*member)())
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:
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Vcpu_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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{
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_signal_cap = _ep.manage(*this);
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}
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~Vcpu_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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_ready_semaphore.up();
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}
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operator Capability<Signal_context>() const { return _signal_cap; }
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};
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#endif /* _INCLUDE__VM_SESSION__HANDLER_H_ */
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