mirror of
https://github.com/Atmosphere-NX/Atmosphere
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114 lines
4.3 KiB
C++
114 lines
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_select_cpu.hpp>
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#include <mesosphere/kern_slab_helpers.hpp>
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#include <mesosphere/kern_k_page_buffer.hpp>
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namespace ams::kern {
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class KThread;
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class KProcess;
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class KThreadLocalPage : public util::IntrusiveRedBlackTreeBaseNode<KThreadLocalPage>, public KSlabAllocated<KThreadLocalPage> {
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public:
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static constexpr size_t RegionsPerPage = PageSize / ams::svc::ThreadLocalRegionSize;
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static_assert(RegionsPerPage > 0);
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private:
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KProcessAddress m_virt_addr;
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KProcess *m_owner;
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bool m_is_region_free[RegionsPerPage];
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public:
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constexpr explicit KThreadLocalPage(KProcessAddress addr) : m_virt_addr(addr), m_owner(nullptr), m_is_region_free() {
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for (size_t i = 0; i < RegionsPerPage; i++) {
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m_is_region_free[i] = true;
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}
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}
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constexpr explicit KThreadLocalPage() : KThreadLocalPage(Null<KProcessAddress>) { /* ... */ }
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constexpr ALWAYS_INLINE KProcessAddress GetAddress() const { return m_virt_addr; }
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static constexpr ALWAYS_INLINE int Compare(const KThreadLocalPage &lhs, const KThreadLocalPage &rhs) {
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const KProcessAddress lval = lhs.GetAddress();
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const KProcessAddress rval = rhs.GetAddress();
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if (lval < rval) {
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return -1;
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} else if (lval == rval) {
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return 0;
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} else {
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return 1;
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}
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}
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private:
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constexpr ALWAYS_INLINE KProcessAddress GetRegionAddress(size_t i) {
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return this->GetAddress() + i * ams::svc::ThreadLocalRegionSize;
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}
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constexpr ALWAYS_INLINE bool Contains(KProcessAddress addr) {
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return this->GetAddress() <= addr && addr < this->GetAddress() + PageSize;
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}
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constexpr ALWAYS_INLINE size_t GetRegionIndex(KProcessAddress addr) {
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MESOSPHERE_ASSERT(util::IsAligned(GetInteger(addr), ams::svc::ThreadLocalRegionSize));
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MESOSPHERE_ASSERT(this->Contains(addr));
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return (addr - this->GetAddress()) / ams::svc::ThreadLocalRegionSize;
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}
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public:
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Result Initialize(KProcess *process);
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Result Finalize();
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KProcessAddress Reserve();
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void Release(KProcessAddress addr);
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void *GetPointer() const;
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bool IsAllUsed() const {
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for (size_t i = 0; i < RegionsPerPage; i++) {
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if (m_is_region_free[i]) {
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return false;
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}
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}
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return true;
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}
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bool IsAllFree() const {
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for (size_t i = 0; i < RegionsPerPage; i++) {
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if (!m_is_region_free[i]) {
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return false;
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}
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}
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return true;
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}
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bool IsAnyUsed() const {
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return !this->IsAllFree();
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}
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bool IsAnyFree() const {
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return !this->IsAllUsed();
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}
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};
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/* Miscellaneous sanity checking. */
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static_assert(ams::svc::ThreadLocalRegionSize == THREAD_LOCAL_REGION_SIZE);
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static_assert(__builtin_offsetof(ams::svc::ThreadLocalRegion, message_buffer) == THREAD_LOCAL_REGION_MESSAGE_BUFFER);
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static_assert(__builtin_offsetof(ams::svc::ThreadLocalRegion, disable_count) == THREAD_LOCAL_REGION_DISABLE_COUNT);
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static_assert(__builtin_offsetof(ams::svc::ThreadLocalRegion, interrupt_flag) == THREAD_LOCAL_REGION_INTERRUPT_FLAG);
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}
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