mirror of
https://github.com/xmrig/xmrig.git
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83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/* XMRig
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* Copyright (c) 2018-2021 SChernykh <https://github.com/SChernykh>
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* Copyright (c) 2016-2021 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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#include "crypto/common/Nonce.h"
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namespace xmrig {
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std::atomic<bool> Nonce::m_paused = {true};
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std::atomic<uint64_t> Nonce::m_sequence[Nonce::MAX] = { {1}, {1}, {1} };
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std::atomic<uint64_t> Nonce::m_nonces[2] = { {0}, {0} };
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} // namespace xmrig
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bool xmrig::Nonce::next(uint8_t index, uint32_t *nonce, uint32_t reserveCount, uint64_t mask)
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{
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mask &= 0x7FFFFFFFFFFFFFFFULL;
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if (reserveCount == 0 || mask < reserveCount - 1) {
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return false;
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}
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uint64_t counter = m_nonces[index].fetch_add(reserveCount, std::memory_order_relaxed);
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while (true) {
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if (mask < counter) {
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return false;
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}
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if (mask - counter <= reserveCount - 1) {
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pause(true);
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if (mask - counter < reserveCount - 1) {
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return false;
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}
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}
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else if (0xFFFFFFFFUL - (uint32_t)counter < reserveCount - 1) {
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counter = m_nonces[index].fetch_add(reserveCount, std::memory_order_relaxed);
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continue;
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}
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*nonce = (nonce[0] & ~mask) | counter;
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if (mask > 0xFFFFFFFFULL) {
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nonce[1] = (nonce[1] & (~mask >> 32)) | (counter >> 32);
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}
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return true;
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}
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}
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void xmrig::Nonce::stop()
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{
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pause(false);
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for (auto &i : m_sequence) {
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i = 0;
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}
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}
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void xmrig::Nonce::touch()
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{
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for (auto &i : m_sequence) {
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i++;
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}
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}
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