86 lines
3 KiB
C++
86 lines
3 KiB
C++
/* XMRig
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* Copyright 2010 Jeff Garzik <jgarzik@pobox.com>
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* Copyright 2012-2014 pooler <pooler@litecoinpool.org>
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* Copyright 2014 Lucas Jones <https://github.com/lucasjones>
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* Copyright 2014-2016 Wolf9466 <https://github.com/OhGodAPet>
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* Copyright 2016 Jay D Dee <jayddee246@gmail.com>
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* Copyright 2017-2018 XMR-Stak <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
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* Copyright 2018 Lee Clagett <https://github.com/vtnerd>
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* Copyright 2018-2019 SChernykh <https://github.com/SChernykh>
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* Copyright 2018-2019 tevador <tevador@gmail.com>
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* Copyright 2016-2019 XMRig <https://github.com/xmrig>, <support@xmrig.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for 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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#ifndef XMRIG_VIRTUALMEMORY_H
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#define XMRIG_VIRTUALMEMORY_H
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#include <stddef.h>
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#include <stdint.h>
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#include <utility>
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namespace xmrig {
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class VirtualMemory
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{
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public:
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inline VirtualMemory() {}
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VirtualMemory(size_t size, bool hugePages = true, size_t align = 64);
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~VirtualMemory();
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inline bool isHugePages() const { return m_flags & HUGEPAGES; }
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inline size_t size() const { return m_size; }
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inline uint8_t *scratchpad() const { return m_scratchpad; }
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inline std::pair<size_t, size_t> hugePages() const
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{
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return std::pair<size_t, size_t>(isHugePages() ? (align(size()) / 2097152) : 0, align(size()) / 2097152);
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}
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static uint32_t bindToNUMANode(int64_t affinity);
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static void *allocateExecutableMemory(size_t size);
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static void *allocateLargePagesMemory(size_t size);
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static void flushInstructionCache(void *p, size_t size);
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static void freeLargePagesMemory(void *p, size_t size);
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static void init(bool hugePages);
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static void protectExecutableMemory(void *p, size_t size);
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static void unprotectExecutableMemory(void *p, size_t size);
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static inline bool isHugepagesAvailable() { return (m_globalFlags & HUGEPAGES_AVAILABLE) != 0; }
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static inline constexpr size_t align(size_t pos, size_t align = 2097152) { return ((pos - 1) / align + 1) * align; }
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private:
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enum Flags {
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HUGEPAGES_AVAILABLE = 1,
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HUGEPAGES = 2,
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LOCK = 4
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};
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static int m_globalFlags;
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int m_flags = 0;
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size_t m_size = 0;
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uint8_t *m_scratchpad = nullptr;
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};
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} /* namespace xmrig */
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#endif /* XMRIG_VIRTUALMEMORY_H */
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