mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-12-23 22:13:40 +00:00
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/*
|
|
KVMGFX Client - A KVM Client for VGA Passthrough
|
|
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
|
|
|
|
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 2 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, write to the Free Software Foundation, Inc., 59 Temple
|
|
Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include "MTMemcpy.h"
|
|
|
|
MTMemcpy::MTMemcpy() :
|
|
m_initialized(false)
|
|
{
|
|
|
|
}
|
|
|
|
MTMemcpy::~MTMemcpy()
|
|
{
|
|
DeInitialize();
|
|
}
|
|
|
|
DWORD WINAPI MTMemcpy::thread_copy_proc(LPVOID param)
|
|
{
|
|
mt_cpy_t * p = (mt_cpy_t *)param;
|
|
|
|
while (1)
|
|
{
|
|
WaitForSingleObject(p->s->hCopyStartSemaphores[p->ct], INFINITE);
|
|
memcpy(p->dest, p->src, p->size);
|
|
ReleaseSemaphore(p->s->hCopyStopSemaphores[p->ct], 1, NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool MTMemcpy::Initialize()
|
|
{
|
|
if (m_initialized)
|
|
DeInitialize();
|
|
|
|
for (int ctr = 0; ctr < NUM_CPY_THREADS; ctr++)
|
|
{
|
|
hCopyStartSemaphores[ctr] = CreateSemaphore(NULL, 0, 1, NULL);
|
|
hCopyStopSemaphores[ctr] = CreateSemaphore(NULL, 0, 1, NULL);
|
|
mtParamters[ctr].s = this;
|
|
mtParamters[ctr].ct = ctr;
|
|
hCopyThreads[ctr] = CreateThread(0, 0, thread_copy_proc, &mtParamters[ctr], 0, NULL);
|
|
}
|
|
|
|
m_initialized = true;
|
|
return true;
|
|
}
|
|
|
|
bool MTMemcpy::Copy(void * dest, void * src, size_t bytes)
|
|
{
|
|
if (!m_initialized)
|
|
return false;
|
|
|
|
//set up parameters
|
|
for (int ctr = 0; ctr < NUM_CPY_THREADS; ctr++)
|
|
{
|
|
mtParamters[ctr].dest = (char *)dest + ctr * bytes / NUM_CPY_THREADS;
|
|
mtParamters[ctr].src = (char *)src + ctr * bytes / NUM_CPY_THREADS;
|
|
mtParamters[ctr].size = (ctr + 1) * bytes / NUM_CPY_THREADS - ctr * bytes / NUM_CPY_THREADS;
|
|
ReleaseSemaphore(hCopyStartSemaphores[ctr], 1, NULL);
|
|
}
|
|
|
|
//wait for all threads to finish
|
|
WaitForMultipleObjects(NUM_CPY_THREADS, hCopyStopSemaphores, TRUE, INFINITE);
|
|
|
|
return true;
|
|
}
|
|
|
|
void MTMemcpy::DeInitialize()
|
|
{
|
|
if (!m_initialized)
|
|
return;
|
|
|
|
for (int ctr = 0; ctr < NUM_CPY_THREADS; ctr++)
|
|
{
|
|
TerminateThread(hCopyThreads[ctr], 0);
|
|
CloseHandle(hCopyStartSemaphores[ctr]);
|
|
CloseHandle(hCopyStopSemaphores[ctr]);
|
|
}
|
|
|
|
m_initialized = false;
|
|
} |