mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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141 lines
4.8 KiB
C++
141 lines
4.8 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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#pragma once
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#include <vapours/common.hpp>
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#include <vapours/assert.hpp>
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namespace ams::util {
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template<typename _Mutex>
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class unique_lock {
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NON_COPYABLE(unique_lock);
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public:
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using mutex_type = _Mutex;
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private:
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mutex_type *m_mutex;
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bool m_owns;
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public:
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unique_lock() noexcept : m_mutex(nullptr), m_owns(false) { /* ... */ }
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explicit unique_lock(mutex_type &m) noexcept : m_mutex(std::addressof(m)), m_owns(false) {
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this->lock();
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m_owns = true;
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}
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unique_lock(mutex_type &m, std::defer_lock_t) noexcept : m_mutex(std::addressof(m)), m_owns(false) { /* ... */ }
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unique_lock(mutex_type &m, std::try_to_lock_t) noexcept : m_mutex(std::addressof(m)), m_owns(m_mutex->try_lock()) { /* ... */ }
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unique_lock(mutex_type &m, std::adopt_lock_t) noexcept : m_mutex(std::addressof(m)), m_owns(true) { /* ... */ }
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template<typename _Clock, typename _Duration>
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unique_lock(mutex_type &m, const std::chrono::time_point<_Clock, _Duration> &time) noexcept : m_mutex(std::addressof(m)), m_owns(m_mutex->try_lock_until(time)) { /* ... */ }
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template<typename _Rep, typename _Period>
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unique_lock(mutex_type &m, const std::chrono::duration<_Rep, _Period> &time) noexcept : m_mutex(std::addressof(m)), m_owns(m_mutex->try_lock_for(time)) { /* ... */ }
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~unique_lock() noexcept {
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if (m_owns) {
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this->unlock();
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}
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}
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unique_lock(unique_lock &&rhs) noexcept : m_mutex(rhs.m_mutex), m_owns(rhs.m_owns) {
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rhs.m_mutex = nullptr;
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rhs.m_owns = false;
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}
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unique_lock &operator=(unique_lock &&rhs) noexcept {
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if (m_owns) {
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this->unlock();
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}
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unique_lock(std::move(rhs)).swap(*this);
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rhs.m_mutex = nullptr;
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rhs.m_owns = false;
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return *this;
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}
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void lock() noexcept {
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AMS_ABORT_UNLESS(m_mutex);
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AMS_ABORT_UNLESS(!m_owns);
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m_mutex->lock();
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m_owns = true;
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}
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bool try_lock() noexcept {
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AMS_ABORT_UNLESS(m_mutex);
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AMS_ABORT_UNLESS(!m_owns);
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m_owns = m_mutex->try_lock();
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return m_owns;
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}
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template<typename _Clock, typename _Duration>
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bool try_lock_until(const std::chrono::time_point<_Clock, _Duration> &time) noexcept {
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AMS_ABORT_UNLESS(m_mutex);
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AMS_ABORT_UNLESS(!m_owns);
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m_owns = m_mutex->try_lock_until(time);
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return m_owns;
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}
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template<typename _Rep, typename _Period>
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bool try_lock_for(const std::chrono::duration<_Rep, _Period> &time) noexcept {
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AMS_ABORT_UNLESS(m_mutex);
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AMS_ABORT_UNLESS(!m_owns);
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m_owns = m_mutex->try_lock_for(time);
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return m_owns;
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}
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void unlock() noexcept {
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AMS_ABORT_UNLESS(m_owns);
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if (m_mutex) {
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m_mutex->unlock();
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m_owns = false;
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}
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}
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void swap(unique_lock &rhs) noexcept {
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std::swap(m_mutex, rhs.m_mutex);
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std::swap(m_owns, rhs.m_owns);
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}
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mutex_type *release() noexcept {
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mutex_type *ret = m_mutex;
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m_mutex = nullptr;
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m_owns = false;
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return ret;
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}
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bool owns_lock() const noexcept {
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return m_owns;
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}
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explicit operator bool() const noexcept {
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return this->owns_lock();
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}
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mutex_type *mutex() const noexcept {
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return m_mutex;
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}
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};
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template<typename _Mutex>
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inline void swap(unique_lock<_Mutex> &lhs, unique_lock<_Mutex> &rhs) noexcept { return lhs.swap(rhs); }
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}
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