mirror of
https://github.com/Atmosphere-NX/Atmosphere-libs.git
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114 lines
4.3 KiB
C++
114 lines
4.3 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 <stratosphere.hpp>
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namespace ams::sf {
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namespace cmif {
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namespace {
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#if !defined(ATMOSPHERE_COMPILER_CLANG)
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ALWAYS_INLINE util::AtomicRef<uintptr_t> GetAtomicSfInlineContext(os::ThreadType *thread = os::GetCurrentThread()) {
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uintptr_t * const p = std::addressof(os::GetSdkInternalTlsArray(thread)->sf_inline_context);
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return util::AtomicRef<uintptr_t>(*p);
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}
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#else
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ALWAYS_INLINE util::Atomic<uintptr_t> &GetAtomicSfInlineContext(os::ThreadType *thread = os::GetCurrentThread()) {
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uintptr_t * const p = std::addressof(os::GetSdkInternalTlsArray(thread)->sf_inline_context);
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static_assert(sizeof(std::atomic<uintptr_t>) == sizeof(uintptr_t));
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static_assert(sizeof(util::Atomic<uintptr_t>) == sizeof(std::atomic<uintptr_t>));
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return *reinterpret_cast<util::Atomic<uintptr_t> *>(p);
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}
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#endif
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ALWAYS_INLINE void OnSetInlineContext(os::ThreadType *thread) {
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#if defined(ATMOSPHERE_OS_HORIZON)
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/* Ensure that libnx receives the priority value. */
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::fsSetPriority(static_cast<::FsPriority>(::ams::sf::GetFsInlineContext(thread)));
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#else
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AMS_UNUSED(thread);
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#endif
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}
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}
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InlineContext GetInlineContext() {
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/* Get the context. */
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uintptr_t thread_context = GetAtomicSfInlineContext().Load();
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/* Copy it out. */
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InlineContext ctx;
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static_assert(sizeof(ctx) <= sizeof(thread_context));
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std::memcpy(std::addressof(ctx), std::addressof(thread_context), sizeof(ctx));
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return ctx;
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}
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InlineContext SetInlineContext(InlineContext ctx) {
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/* Get current thread. */
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os::ThreadType * const cur_thread = os::GetCurrentThread();
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ON_SCOPE_EXIT { OnSetInlineContext(cur_thread); };
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/* Create the new context. */
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static_assert(sizeof(ctx) <= sizeof(uintptr_t));
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uintptr_t new_context_value = 0;
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std::memcpy(std::addressof(new_context_value), std::addressof(ctx), sizeof(ctx));
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/* Get the old context. */
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uintptr_t old_context_value = GetAtomicSfInlineContext(cur_thread).Exchange(new_context_value);
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/* Convert and copy it out. */
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InlineContext old_ctx;
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std::memcpy(std::addressof(old_ctx), std::addressof(old_context_value), sizeof(old_ctx));
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return old_ctx;
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}
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}
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namespace {
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#if !defined(ATMOSPHERE_COMPILER_CLANG)
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ALWAYS_INLINE util::AtomicRef<u8> GetAtomicFsInlineContext(os::ThreadType *thread) {
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uintptr_t * const p = std::addressof(os::GetSdkInternalTlsArray(thread)->sf_inline_context);
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return util::AtomicRef<u8>(*reinterpret_cast<u8 *>(p));
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}
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#else
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ALWAYS_INLINE util::Atomic<u8> &GetAtomicFsInlineContext(os::ThreadType *thread) {
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uintptr_t * const p = std::addressof(os::GetSdkInternalTlsArray(thread)->sf_inline_context);
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static_assert(sizeof(std::atomic<u8>) == sizeof(u8));
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static_assert(sizeof(util::Atomic<u8>) == sizeof(std::atomic<u8>));
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return *reinterpret_cast<util::Atomic<u8> *>(reinterpret_cast<u8 *>(p));
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}
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#endif
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}
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u8 GetFsInlineContext(os::ThreadType *thread) {
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return GetAtomicFsInlineContext(thread).Load();
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}
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u8 SetFsInlineContext(os::ThreadType *thread, u8 ctx) {
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ON_SCOPE_EXIT { cmif::OnSetInlineContext(thread); };
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return GetAtomicFsInlineContext(thread).Exchange(ctx);
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}
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}
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