mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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120 lines
No EOL
4.3 KiB
C++
120 lines
No EOL
4.3 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 <mesosphere/kern_common.hpp>
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#include <mesosphere/kern_k_typed_address.hpp>
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#include <mesosphere/kern_slab_helpers.hpp>
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namespace ams::kern {
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class KBlockInfoManager;
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class KBlockInfo : public util::IntrusiveListBaseNode<KBlockInfo> {
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private:
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KVirtualAddress address;
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size_t num_pages;
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public:
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constexpr KBlockInfo() : util::IntrusiveListBaseNode<KBlockInfo>(), address(), num_pages() { /* ... */ }
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constexpr void Initialize(KVirtualAddress addr, size_t np) {
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this->address = addr;
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this->num_pages = np;
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}
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constexpr KVirtualAddress GetAddress() const { return this->address; }
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constexpr size_t GetNumPages() const { return this->num_pages; }
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constexpr size_t GetSize() const { return this->GetNumPages() * PageSize; }
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constexpr KVirtualAddress GetEndAddress() const { return this->GetAddress() + this->GetSize(); }
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constexpr bool IsEquivalentTo(const KBlockInfo &rhs) const {
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return this->address == rhs.address && this->num_pages == rhs.num_pages;
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}
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constexpr bool operator==(const KBlockInfo &rhs) const {
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return this->IsEquivalentTo(rhs);
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}
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constexpr bool operator!=(const KBlockInfo &rhs) const {
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return !(*this == rhs);
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}
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constexpr bool IsStrictlyBefore(KVirtualAddress addr) const {
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const KVirtualAddress end = this->GetEndAddress();
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if (this->address != Null<KVirtualAddress> && end == Null<KVirtualAddress>) {
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return false;
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}
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return end < addr;
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}
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constexpr bool operator<(KVirtualAddress addr) const {
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return this->IsStrictlyBefore(addr);
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}
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constexpr bool TryConcatenate(KVirtualAddress addr, size_t np) {
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if (addr != Null<KVirtualAddress> && addr == this->GetEndAddress()) {
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this->num_pages += np;
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return true;
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}
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return false;
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}
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};
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class KPageGroup {
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public:
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using BlockInfoList = util::IntrusiveListBaseTraits<KBlockInfo>::ListType;
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using iterator = BlockInfoList::const_iterator;
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private:
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BlockInfoList block_list;
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KBlockInfoManager *manager;
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public:
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explicit KPageGroup(KBlockInfoManager *m) : block_list(), manager(m) { /* ... */ }
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~KPageGroup() { this->Finalize(); }
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void Finalize();
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iterator begin() const { return this->block_list.begin(); }
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iterator end() const { return this->block_list.end(); }
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Result AddBlock(KVirtualAddress addr, size_t num_pages);
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void Open() const;
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void Close() const;
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size_t GetNumPages() const;
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bool IsEquivalentTo(const KPageGroup &rhs) const;
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bool operator==(const KPageGroup &rhs) const {
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return this->IsEquivalentTo(rhs);
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}
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bool operator!=(const KPageGroup &rhs) const {
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return !(*this == rhs);
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}
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};
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class KScopedPageGroup {
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private:
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KPageGroup *group;
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public:
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explicit ALWAYS_INLINE KScopedPageGroup(KPageGroup *gp) : group(gp) { group->Open(); }
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explicit ALWAYS_INLINE KScopedPageGroup(KPageGroup &gp) : KScopedPageGroup(std::addressof(gp)) { /* ... */ }
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ALWAYS_INLINE ~KScopedPageGroup() { group->Close(); }
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};
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} |