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https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
/*
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* Copyright (c) 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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#include <mesosphere.hpp>
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namespace ams::kern {
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void KPageGroup::Finalize() {
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KBlockInfo *cur = m_first_block;
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while (cur != nullptr) {
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KBlockInfo *next = cur->GetNext();
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m_manager->Free(cur);
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cur = next;
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}
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m_first_block = nullptr;
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m_last_block = nullptr;
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}
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void KPageGroup::CloseAndReset() {
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auto &mm = Kernel::GetMemoryManager();
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KBlockInfo *cur = m_first_block;
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while (cur != nullptr) {
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KBlockInfo *next = cur->GetNext();
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mm.Close(cur->GetAddress(), cur->GetNumPages());
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m_manager->Free(cur);
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cur = next;
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}
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m_first_block = nullptr;
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m_last_block = nullptr;
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}
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size_t KPageGroup::GetNumPages() const {
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size_t num_pages = 0;
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for (const auto &it : *this) {
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num_pages += it.GetNumPages();
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}
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return num_pages;
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}
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Result KPageGroup::AddBlock(KPhysicalAddress addr, size_t num_pages) {
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/* Succeed immediately if we're adding no pages. */
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R_SUCCEED_IF(num_pages == 0);
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/* Check for overflow. */
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MESOSPHERE_ASSERT(addr < addr + num_pages * PageSize);
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/* Try to just append to the last block. */
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if (m_last_block != nullptr) {
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R_SUCCEED_IF(m_last_block->TryConcatenate(addr, num_pages));
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}
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/* Allocate a new block. */
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KBlockInfo *new_block = m_manager->Allocate();
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R_UNLESS(new_block != nullptr, svc::ResultOutOfResource());
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/* Initialize the block. */
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new_block->Initialize(addr, num_pages);
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/* Add the block to our list. */
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if (m_last_block != nullptr) {
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m_last_block->SetNext(new_block);
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} else {
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m_first_block = new_block;
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}
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m_last_block = new_block;
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R_SUCCEED();
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}
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void KPageGroup::Open() const {
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auto &mm = Kernel::GetMemoryManager();
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for (const auto &it : *this) {
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mm.Open(it.GetAddress(), it.GetNumPages());
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}
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}
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void KPageGroup::Close() const {
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auto &mm = Kernel::GetMemoryManager();
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for (const auto &it : *this) {
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mm.Close(it.GetAddress(), it.GetNumPages());
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}
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}
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bool KPageGroup::IsEquivalentTo(const KPageGroup &rhs) const {
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auto lit = this->begin();
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auto rit = rhs.begin();
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auto lend = this->end();
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auto rend = rhs.end();
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while (lit != lend && rit != rend) {
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if (*lit != *rit) {
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return false;
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}
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++lit;
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++rit;
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}
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return lit == lend && rit == rend;
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}
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}
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