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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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76 lines
2.4 KiB
C++
76 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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#if defined(ATMOSPHERE_OS_LINUX)
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#include <sys/syscall.h>
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#include <unistd.h>
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#endif
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#if defined(AMS_OS_IMPL_USE_PTHREADS)
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namespace ams::os::impl {
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#if defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
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namespace {
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#if defined(ATMOSPHERE_OS_LINUX)
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template<typename T>
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concept IsGlibcPthreadMutexImplementationWithOwnerField = requires (T &t) {
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{ t.__data.__owner } -> std::convertible_to<int>;
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};
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static_assert(IsGlibcPthreadMutexImplementationWithOwnerField<pthread_mutex_t>);
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#endif
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}
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#endif
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void InternalCriticalSectionImpl::Initialize() {
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/* TODO: What should be done here? */
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}
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void InternalCriticalSectionImpl::Finalize() {
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/* TODO: What should be done here? */
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}
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void InternalCriticalSectionImpl::Enter() {
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AMS_ABORT_UNLESS(pthread_mutex_lock(std::addressof(m_pthread_mutex)) == 0);
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}
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bool InternalCriticalSectionImpl::TryEnter() {
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return pthread_mutex_trylock(std::addressof(m_pthread_mutex)) == 0;
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}
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void InternalCriticalSectionImpl::Leave() {
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AMS_ABORT_UNLESS(pthread_mutex_unlock(std::addressof(m_pthread_mutex)) == 0);
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}
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#if defined(AMS_OS_INTERNAL_CRITICAL_SECTION_IMPL_CAN_CHECK_LOCKED_BY_CURRENT_THREAD)
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bool InternalCriticalSectionImpl::IsLockedByCurrentThread() const {
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/* TODO: This should be less of a terrible hack. */
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#if defined(ATMOSPHERE_OS_LINUX)
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return m_pthread_mutex.__data.__owner == ::syscall(SYS_gettid);
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#else
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#error "Unknown OS/underlying implementation for pthread InternalCriticalSectionImpl::IsLockedByCurrentThread()"
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#endif
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}
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#endif
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}
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#endif
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