ipc_server

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// vi:set ft=cpp: -*- Mode: C++ -*-
/*
 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
 *               Alexander Warg <warg@os.inf.tu-dresden.de>,
 *               Torsten Frenzel <frenzel@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */
#pragma once
 
#include <l4/sys/capability>
#include <l4/sys/typeinfo_svr>
#include <l4/sys/err.h>
#include <l4/cxx/ipc_stream>
#include <l4/sys/cxx/ipc_epiface>
#include <l4/sys/cxx/ipc_server_loop>
#include <l4/cxx/type_traits>
#include <l4/cxx/exceptions>
 
namespace L4 {
 
class Server_object : public Epiface
{
public:
  virtual int dispatch(unsigned long rights, Ipc::Iostream &ios) = 0;
 
  l4_msgtag_t dispatch(l4_msgtag_t tag, unsigned rights, l4_utcb_t *utcb) override
  {
    L4::Ipc::Iostream ios(utcb);
    ios.tag() = tag;
    int r = dispatch(rights, ios);
    return ios.prepare_ipc(r);
  }
 
  Cap<Kobject> obj_cap() const
  { return cap_cast<Kobject>(Epiface::obj_cap()); }
};
 
template<typename IFACE, typename BASE = L4::Server_object>
struct Server_object_t : BASE
{
  typedef IFACE Interface;
 
  typename BASE::Demand get_buffer_demand() const override
  { return typename L4::Kobject_typeid<IFACE>::Demand(); }
 
  int dispatch_meta_request(L4::Ipc::Iostream &ios)
  { return L4::Util::handle_meta_request<IFACE>(ios); }
 
  template<typename THIS>
  static int proto_dispatch(THIS *self, l4_umword_t rights, L4::Ipc::Iostream &ios)
  {
    l4_msgtag_t t;
    ios >> t;
    return Kobject_typeid<IFACE>::proto_dispatch(self, t.label(), rights, ios);
  }
};
 
template<typename Derived, typename IFACE, typename BASE = L4::Server_object>
struct Server_object_x : Server_object_t<IFACE, BASE>
{
  int dispatch(l4_umword_t r, L4::Ipc::Iostream &ios)
  {
    return Server_object_t<IFACE, BASE>::proto_dispatch(static_cast<Derived *>(this),
                                                        r, ios);
  }
};
 
struct Irq_handler_object : Server_object_t<Kobject> {};
 
}