2015-02-19 14:50:27 +01:00
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/*
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* \brief VM session component for 'base-hw'
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* \author Stefan Kalkowski
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* \date 2012-10-08
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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) 2012-2017 Genode Labs GmbH
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2015-02-19 14:50:27 +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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2015-02-19 14:50:27 +01:00
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*/
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#include <vm_session_component.h>
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#include <platform.h>
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#include <core_env.h>
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using namespace Genode;
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addr_t Vm_session_component::_alloc_ds(size_t &ram_quota)
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{
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addr_t addr;
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if (_ds_size() > ram_quota ||
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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().ram_alloc().alloc_aligned(_ds_size(), (void**)&addr,
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get_page_size_log2()).error())
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2017-05-08 14:32:03 +02:00
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throw Insufficient_ram_quota();
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2015-02-19 14:50:27 +01:00
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ram_quota -= _ds_size();
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return addr;
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}
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void Vm_session_component::run(void)
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{
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2015-05-19 14:18:40 +02:00
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if (Kernel_object<Kernel::Vm>::_cap.valid())
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Kernel::run_vm(kernel_object());
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2015-02-19 14:50:27 +01:00
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}
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void Vm_session_component::pause(void)
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{
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2015-05-19 14:18:40 +02:00
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if (Kernel_object<Kernel::Vm>::_cap.valid())
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Kernel::pause_vm(kernel_object());
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2015-02-19 14:50:27 +01:00
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}
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