Preparation for #1.4.0 (#30)

- Fixed CPU affinity on Windows for NUMA and CPUs with lot of cores
- Implemented per thread configurable Multihash mode (double, triple, quadruple, quintuple)
- Rebased from XMRig 2.4.4

src/CpuImpl.h

@@ -0,0 +1,67 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2016-2017 XMRig       <support@xmrig.com>
+ * Copyright 2018      Sebastian Stolzenberg <https://github.com/sebastianstolzenberg>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __CPU_IMPL_H__
+#define __CPU_IMPL_H__
+
+
+#include <cstdint>
+#include <vector>
+
+#include "Options.h"
+
+class CpuImpl
+{
+public:
+    static CpuImpl& instance();
+    CpuImpl();
+    void init();
+
+    void optimizeParameters(size_t& threadsCount, size_t& hashFactor, Options::Algo algo,
+                            size_t maxCpuUsage, bool safeMode);
+    void setAffinity(int id, uint64_t mask);
+
+    bool hasAES();
+    bool isX64();
+    const char *brand() { return m_brand; }
+    size_t l2()            { return m_l2_cache; }
+    size_t l3()            { return m_l3_cache; }
+    size_t cores()         { return m_totalCores; }
+    size_t sockets()       { return m_sockets; }
+    size_t threads()       { return m_totalThreads; }
+    size_t availableCache();
+
+private:
+    void initCommon();
+
+    bool m_l2_exclusive;
+    char m_brand[64];
+    int m_flags;
+    size_t m_l2_cache;
+    size_t m_l3_cache;
+    size_t m_sockets;
+    size_t m_totalCores;
+    size_t m_totalThreads;
+};
+
+#endif /* __CPU_IMPL_H__ */