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90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
/*
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Looking Glass - KVM FrameRelay (KVMFR) Client
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Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
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https://looking-glass.hostfission.com
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "MultiMemcpy.h"
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#include "common/memcpySSE.h"
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MultiMemcpy::MultiMemcpy()
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{
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for (int i = 0; i < MULTIMEMCPY_THREADS; ++i)
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{
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m_workers[i].id = (1 << i);
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m_workers[i].running = &m_running;
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m_workers[i].abort = false;
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m_workers[i].start = CreateSemaphore(NULL, 0, 1, NULL);
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m_workers[i].thread = CreateThread(0, 0, WorkerFunction, &m_workers[i], 0, NULL);
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}
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}
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MultiMemcpy::~MultiMemcpy()
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{
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for(int i = 0; i < MULTIMEMCPY_THREADS; ++i)
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{
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TerminateThread(m_workers[i].thread, 0);
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CloseHandle(m_workers[i].start);
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}
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}
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void MultiMemcpy::Copy(void * dst, void * src, size_t size)
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{
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const size_t block = (size / MULTIMEMCPY_THREADS) & ~0x7F;
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if (block == 0)
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{
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Abort();
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memcpySSE(dst, src, size);
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return;
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}
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Wake();
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for (int i = 0; i < MULTIMEMCPY_THREADS; ++i)
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{
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m_workers[i].dst = (uint8_t *)dst + i * block;
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m_workers[i].src = (uint8_t *)src + i * block;
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if (i == MULTIMEMCPY_THREADS - 1)
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m_workers[i].size = size - (block * i);
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else
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m_workers[i].size = block;
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}
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INTERLOCKED_OR8(&m_running, (1 << MULTIMEMCPY_THREADS) - 1);
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while(m_running) {}
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m_awake = false;
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}
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DWORD WINAPI MultiMemcpy::WorkerFunction(LPVOID param)
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{
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struct Worker * w = (struct Worker *)param;
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for(;;)
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{
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WaitForSingleObject(w->start, INFINITE);
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while(!(*w->running & w->id)) {}
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if (w->abort)
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{
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w->abort = false;
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INTERLOCKED_AND8(w->running, ~w->id);
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continue;
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}
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memcpySSE(w->dst, w->src, w->size);
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INTERLOCKED_AND8(w->running, ~w->id);
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}
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} |