mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-25 14:11:15 +00:00
94 lines
3.4 KiB
C++
94 lines
3.4 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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#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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ALWAYS_INLINE std::atomic<uintptr_t> *GetAtomicSfInlineContext(os::ThreadType *thread) {
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static_assert(sizeof(thread->atomic_sf_inline_context) >= sizeof(std::atomic<uintptr_t>));
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return reinterpret_cast<std::atomic<uintptr_t> *>(std::addressof(thread->atomic_sf_inline_context));
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}
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ALWAYS_INLINE std::atomic<uintptr_t> *GetAtomicSfInlineContext() {
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return GetAtomicSfInlineContext(os::GetCurrentThread());
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}
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ALWAYS_INLINE void OnSetInlineContext(os::ThreadType *thread) {
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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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}
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}
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InlineContext GetInlineContext() {
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/* Get current thread. */
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os::ThreadType * const cur_thread = os::GetCurrentThread();
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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()->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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ALWAYS_INLINE std::atomic<u8> *GetAtomicFsInlineContext(os::ThreadType *thread) {
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static_assert(sizeof(thread->atomic_sf_inline_context) >= sizeof(std::atomic<u8>));
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return reinterpret_cast<std::atomic<u8> *>(std::addressof(thread->atomic_sf_inline_context));
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}
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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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