mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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100 lines
3.5 KiB
C++
100 lines
3.5 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours.hpp>
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#include <stratosphere/ddsf/ddsf_types.hpp>
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#include <stratosphere/ddsf/impl/ddsf_for_each.hpp>
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#include <stratosphere/ddsf/ddsf_i_castable.hpp>
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namespace ams::ddsf {
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class ISession;
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class IDevice;
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Result OpenSession(IDevice *device, ISession *session, AccessMode access_mode);
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void CloseSession(ISession *session);
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class ISession : public ICastable {
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friend Result OpenSession(IDevice *device, ISession *session, AccessMode mode);
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friend void CloseSession(ISession *session);
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public:
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AMS_DDSF_CASTABLE_ROOT_TRAITS(ams::ddsf::IDevice);
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private:
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util::IntrusiveListNode list_node;
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IDevice *device;
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AccessMode access_mode;
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public:
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using ListTraits = util::IntrusiveListMemberTraitsDeferredAssert<&ISession::list_node>;
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using List = typename ListTraits::ListType;
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friend class util::IntrusiveList<ISession, util::IntrusiveListMemberTraitsDeferredAssert<&ISession::list_node>>;
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private:
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void AttachDevice(IDevice *dev, AccessMode mode) {
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AMS_ASSERT(dev != nullptr);
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AMS_ASSERT(!this->IsOpen());
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this->device = dev;
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this->access_mode = mode;
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AMS_ASSERT(this->IsOpen());
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}
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void DetachDevice() {
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AMS_ASSERT(this->IsOpen());
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this->device = nullptr;
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this->access_mode = AccessMode_None;
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AMS_ASSERT(!this->IsOpen());
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}
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public:
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ISession() : list_node(), device(nullptr), access_mode() { /* ... */ }
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protected:
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~ISession() { this->DetachDevice(); AMS_ASSERT(!this->IsOpen()); }
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public:
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void AddTo(List &list) {
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list.push_back(*this);
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}
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void RemoveFrom(List list) {
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list.erase(list.iterator_to(*this));
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}
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bool IsLinkedToList() const {
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return this->list_node.IsLinked();
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}
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IDevice &GetDevice() {
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AMS_ASSERT(this->IsOpen());
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return *this->device;
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}
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const IDevice &GetDevice() const {
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AMS_ASSERT(this->IsOpen());
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return *this->device;
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}
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bool IsOpen() const {
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return this->device != nullptr;
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}
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bool CheckAccess(AccessMode mode) const {
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AMS_ASSERT(this->IsOpen());
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return ((~this->access_mode) & mode) == 0;
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}
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bool CheckExclusiveWrite() const {
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return this->CheckAccess(AccessMode_Write) && !this->CheckAccess(AccessMode_Shared);
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}
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};
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static_assert(ISession::ListTraits::IsValid());
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}
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