mirror of
https://github.com/Atmosphere-NX/Atmosphere-libs.git
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66 lines
2.4 KiB
C++
66 lines
2.4 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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#include <stratosphere/windows.hpp>
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#include "os_internal_critical_section_impl.os.windows.hpp"
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namespace ams::os::impl {
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void InternalCriticalSectionImpl::Initialize() {
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::InitializeCriticalSection(std::addressof(util::GetReference(m_windows_critical_section_storage).cs));
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}
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void InternalCriticalSectionImpl::Finalize() {
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::DeleteCriticalSection(std::addressof(util::GetReference(m_windows_critical_section_storage).cs));
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}
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void InternalCriticalSectionImpl::Enter() {
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::EnterCriticalSection(std::addressof(util::GetReference(m_windows_critical_section_storage).cs));
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}
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bool InternalCriticalSectionImpl::TryEnter() {
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return ::TryEnterCriticalSection(std::addressof(util::GetReference(m_windows_critical_section_storage).cs)) != 0;
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}
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void InternalCriticalSectionImpl::Leave() {
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return ::LeaveCriticalSection(std::addressof(util::GetReference(m_windows_critical_section_storage).cs));
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}
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bool InternalCriticalSectionImpl::IsLockedByCurrentThread() const {
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/* Get the cs. */
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CRITICAL_SECTION * const cs = std::addressof(util::GetReference(m_windows_critical_section_storage).cs);
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/* If the critical section has no owning thread, it's not locked. */
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if (cs->OwningThread == nullptr) {
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return false;
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}
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/* If it has an owner, TryLock() will succeed if and only if we own the critical section. */
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if (::TryEnterCriticalSection(cs) == 0) {
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return false;
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}
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/* We now hold the critical section. To avoid a race, check that we didn't just acquire it by chance. */
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const auto holds_lock = cs->RecursionCount > 1;
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/* Leave, since we just successfully entered. */
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::LeaveCriticalSection(cs);
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return holds_lock;
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}
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}
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