From 7ec97f8f19318d6535c0b1b0e32258ce371a6a1f Mon Sep 17 00:00:00 2001
From: Andrey Astafyev <dev@246060.ru>
Date: Thu, 9 Apr 2020 09:38:28 +0300
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
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---
 src/myx/filesystem/paths_mt.cpp | 34 ++++++++++++++++++++++
 src/myx/filesystem/paths_mt.hpp | 50 +++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 src/myx/filesystem/paths_mt.cpp
 create mode 100644 src/myx/filesystem/paths_mt.hpp

diff --git a/src/myx/filesystem/paths_mt.cpp b/src/myx/filesystem/paths_mt.cpp
new file mode 100644
index 0000000..cffebf0
--- /dev/null
+++ b/src/myx/filesystem/paths_mt.cpp
@@ -0,0 +1,34 @@
+#include <myx/base/config.hpp>
+#include <myx/filesystem/current_executable.hpp>
+#include <myx/filesystem/paths_mt.hpp>
+
+#include <paths.h>
+
+#include <QCoreApplication>
+#include <QString>
+
+namespace myx {
+
+namespace filesystem {
+
+PathsMT::PathsMT() = default;
+
+PathsMT* PathsMT::instance()
+{
+	volatile PathsMT* localInstance = mInstance.load( std::memory_order_acquire );
+	if ( localInstance == nullptr )
+	{
+		std::lock_guard< std::mutex > myLock( mMutex );
+		localInstance = mInstance.load( std::memory_order_relaxed );
+		if ( localInstance == nullptr ) // -V1036
+		{
+			localInstance = new PathsMT();
+			mInstance.store( const_cast< PathsMT* >( localInstance ), std::memory_order_release ); // NOLINT
+		}
+	}
+	return( const_cast< PathsMT* >( localInstance ) ); // NOLINT
+}
+
+} // namespace filesystem
+
+} // namespace myx
diff --git a/src/myx/filesystem/paths_mt.hpp b/src/myx/filesystem/paths_mt.hpp
new file mode 100644
index 0000000..1e5a5bc
--- /dev/null
+++ b/src/myx/filesystem/paths_mt.hpp
@@ -0,0 +1,50 @@
+/**
+  * @file paths.hpp
+  * @brief Стандартные пути к каталогам и файлам
+  */
+
+#ifndef MYX_FILESYSTEM_PATHS_MT_HPP_
+#define MYX_FILESYSTEM_PATHS_MT_HPP_
+
+#pragma once
+
+#include <myx/filesystem/paths.hpp>
+#include <myx/filesystem/current_executable.hpp>
+
+#include <QString>
+#include <QDir>
+#include <QFileInfo>
+
+#include <atomic>
+#include <future>
+#include <mutex>
+#include <thread>
+
+namespace myx {
+
+namespace filesystem {
+
+/// @brief Потокобезопасная версия класса myx::filesystem::Paths
+class PathsMT : public Paths
+{
+	PathsMT();
+	~PathsMT() = default;
+	PathsMT( const PathsMT& ) = delete;
+	PathsMT& operator=( const PathsMT& ) = delete;
+
+	static std::atomic< PathsMT* > mInstance;
+	static std::mutex              mMutex;
+
+public:
+	/**
+	 * @brief getInstance
+	 * @return Уникальный экземпляр класса PathsMT
+	 */
+	static PathsMT* instance();
+}; // class PathsMT
+
+} // namespace filesystem
+
+} // namespace myx
+
+#endif // MYX_FILESYSTEM_PATHS_MT_HPP_