2016-05-10 18:05:38 +02:00
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/*
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* \brief Core implementation of the CPU thread interface
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* \author Norman Feske
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* \date 2016-05-10
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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) 2016-2017 Genode Labs GmbH
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2016-05-10 18:05:38 +02:00
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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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2016-05-10 18:05:38 +02:00
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*/
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/* core includes */
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#include <cpu_thread_component.h>
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using namespace Genode;
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void Cpu_thread_component::_update_exception_sigh()
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{
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Signal_context_capability sigh = _thread_sigh.valid()
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? _thread_sigh : _session_sigh;
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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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_platform_thread.pager().exception_handler(sigh);
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2016-05-10 18:05:38 +02:00
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}
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void Cpu_thread_component::quota(size_t quota)
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{
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_platform_thread.quota(quota);
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}
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void Cpu_thread_component::session_exception_sigh(Signal_context_capability sigh)
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{
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_session_sigh = sigh;
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_update_exception_sigh();
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}
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void Cpu_thread_component::start(addr_t ip, addr_t sp)
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{
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_platform_thread.start((void *)ip, (void *)sp);
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}
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void Cpu_thread_component::pause()
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{
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_platform_thread.pause();
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}
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void Cpu_thread_component::single_step(bool enabled)
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{
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_platform_thread.single_step(enabled);
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}
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void Cpu_thread_component::resume()
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{
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_platform_thread.resume();
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}
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void Cpu_thread_component::cancel_blocking()
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{
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_platform_thread.cancel_blocking();
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}
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Thread_state Cpu_thread_component::state()
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{
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return _platform_thread.state();
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}
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void Cpu_thread_component::state(Thread_state const &state)
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{
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_platform_thread.state(state);
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}
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void Cpu_thread_component::exception_sigh(Signal_context_capability sigh)
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{
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_thread_sigh = sigh;
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_update_exception_sigh();
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}
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void Cpu_thread_component::affinity(Affinity::Location location)
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{
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_platform_thread.affinity(location);
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}
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unsigned Cpu_thread_component::trace_control_index()
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{
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return _trace_control_slot.index;
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}
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Dataspace_capability Cpu_thread_component::trace_buffer()
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{
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return _trace_source.buffer();
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}
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Dataspace_capability Cpu_thread_component::trace_policy()
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{
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return _trace_source.policy();
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}
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