2011-12-22 16:19:25 +01:00
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/*
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* \brief Paging-server framework
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* \author Norman Feske
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* \author Christian Helmuth
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* \date 2006-04-28
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*
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* Linux dummies
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*/
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/*
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2017-02-20 13:23:52 +01:00
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* Copyright (C) 2006-2017 Genode Labs GmbH
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2011-12-22 16:19:25 +01:00
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*
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* This file is part of the Genode OS framework, which is distributed
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2017-02-20 13:23:52 +01:00
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* under the terms of the GNU Affero General Public License version 3.
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2011-12-22 16:19:25 +01:00
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*/
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2015-06-19 14:58:18 +02:00
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#ifndef _CORE__INCLUDE__PAGER_H_
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#define _CORE__INCLUDE__PAGER_H_
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2011-12-22 16:19:25 +01:00
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2016-01-19 20:24:22 +01:00
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/* Genode includes */
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2011-12-22 16:19:25 +01:00
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#include <base/signal.h>
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2019-01-30 17:53:16 +01:00
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#include <cpu_session/cpu_session.h> /* for 'Thread_capability' type */
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2011-12-22 16:19:25 +01:00
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#include <pager/capability.h>
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2016-01-19 20:24:22 +01:00
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/* core-local includes */
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#include <rpc_cap_factory.h>
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2011-12-22 16:19:25 +01:00
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namespace Genode {
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2019-09-06 11:04:11 +02:00
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class Platform_thread;
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class Pager_object
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2011-12-22 16:19:25 +01:00
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{
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2019-09-06 11:04:11 +02:00
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friend class Platform_thread;
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protected:
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Thread_capability _thread_cap { };
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Signal_context_capability _sigh { };
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public:
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2011-12-22 16:19:25 +01:00
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2019-09-06 11:04:11 +02:00
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virtual ~Pager_object() { }
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2012-11-29 13:37:30 +01:00
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2019-09-06 11:04:11 +02:00
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void exception_handler(Signal_context_capability sigh) { _sigh = sigh; }
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2012-11-29 13:37:30 +01:00
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2019-09-06 11:04:11 +02:00
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/**
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* Remember thread cap so that rm_session can tell thread that
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* rm_client is gone.
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*/
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Thread_capability thread_cap() const { return _thread_cap; }
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void thread_cap(Thread_capability cap) { _thread_cap = cap; }
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2011-12-22 16:19:25 +01:00
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};
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struct Pager_entrypoint
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{
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2016-01-19 20:24:22 +01:00
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Pager_entrypoint(Rpc_cap_factory &) { }
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2011-12-22 16:19:25 +01:00
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2015-08-10 13:34:16 +02:00
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template <typename FUNC>
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auto apply(Pager_capability, FUNC f) -> decltype(f(nullptr)) {
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return f(nullptr); }
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2016-04-20 21:12:57 +02:00
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base/core: use references instead of pointers
This patch replaces the former prominent use of pointers by references
wherever feasible. This has the following benefits:
* The contract between caller and callee becomes more obvious. When
passing a reference, the contract says that the argument cannot be
a null pointer. The caller is responsible to ensure that. Therefore,
the use of reference eliminates the need to add defensive null-pointer
checks at the callee site, which sometimes merely exist to be on the
safe side. The bottom line is that the code becomes easier to follow.
* Reference members must be initialized via an object initializer,
which promotes a programming style that avoids intermediate object-
construction states. Within core, there are still a few pointers
as member variables left though. E.g., caused by the late association
of 'Platform_thread' objects with their 'Platform_pd' objects.
* If no pointers are present as member variables, we don't need to
manually provide declarations of a private copy constructor and
an assignment operator to avoid -Weffc++ errors "class ... has
pointer data members [-Werror=effc++]".
This patch also changes a few system bindings on NOVA and Fiasco.OC,
e.g., the return value of the global 'cap_map' accessor has become a
reference. Hence, the patch touches a few places outside of core.
Fixes #3135
2019-01-24 22:00:01 +01:00
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Pager_capability manage(Pager_object &) { return Pager_capability(); }
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2016-04-20 21:12:57 +02:00
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base/core: use references instead of pointers
This patch replaces the former prominent use of pointers by references
wherever feasible. This has the following benefits:
* The contract between caller and callee becomes more obvious. When
passing a reference, the contract says that the argument cannot be
a null pointer. The caller is responsible to ensure that. Therefore,
the use of reference eliminates the need to add defensive null-pointer
checks at the callee site, which sometimes merely exist to be on the
safe side. The bottom line is that the code becomes easier to follow.
* Reference members must be initialized via an object initializer,
which promotes a programming style that avoids intermediate object-
construction states. Within core, there are still a few pointers
as member variables left though. E.g., caused by the late association
of 'Platform_thread' objects with their 'Platform_pd' objects.
* If no pointers are present as member variables, we don't need to
manually provide declarations of a private copy constructor and
an assignment operator to avoid -Weffc++ errors "class ... has
pointer data members [-Werror=effc++]".
This patch also changes a few system bindings on NOVA and Fiasco.OC,
e.g., the return value of the global 'cap_map' accessor has become a
reference. Hence, the patch touches a few places outside of core.
Fixes #3135
2019-01-24 22:00:01 +01:00
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void dissolve(Pager_object &) { }
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2011-12-22 16:19:25 +01:00
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};
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}
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2015-06-19 14:58:18 +02:00
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#endif /* _CORE__INCLUDE__PAGER_H_ */
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