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//---------------------------------------------------------------------------------
//
// Little Color Management System, multithread extensions
// Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
//
//
// 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/>.
//
//---------------------------------------------------------------------------------
#include "threaded_internal.h"
// This is the threading support. Unfortunately, it has to be platform-dependent because
// windows does not support pthreads.
#ifdef CMS_IS_WINDOWS_
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
// To pass parameter to the thread
typedef struct
{
_cmsTransform2Fn worker;
_cmsWorkSlice* param;
} thread_adaptor_param;
// This is an adaptor to the native thread on windows
static
DWORD WINAPI thread_adaptor(LPVOID p)
{
thread_adaptor_param* ap = (thread_adaptor_param*)p;
_cmsWorkSlice* s = ap->param;
ap->worker(s->CMMcargo, s->InputBuffer, s->OutputBuffer,
s->PixelsPerLine, s->LineCount, s->Stride);
_cmsFree(0, p);
return 0;
}
// This function creates a thread and executes it. The thread calls the worker function
// with the given parameters.
cmsHANDLE _cmsThrCreateWorker(cmsContext ContextID, _cmsTransform2Fn worker, _cmsWorkSlice* param)
{
DWORD ThreadID;
thread_adaptor_param* p;
HANDLE handle;
p = (thread_adaptor_param*)_cmsMalloc(0, sizeof(thread_adaptor_param));
if (p == NULL) return NULL;
p->worker = worker;
p->param = param;
handle = CreateThread(NULL, 0, thread_adaptor, (LPVOID) p, 0, &ThreadID);
if (handle == NULL)
{
cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot create thread");
}
return (cmsHANDLE)handle;
}
// Waits until given thread is ended
void _cmsThrJoinWorker(cmsContext ContextID, cmsHANDLE hWorker)
{
if (WaitForSingleObject((HANDLE)hWorker, INFINITE) != WAIT_OBJECT_0)
{
cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot join thread");
}
}
// Returns the ideal number of threads the system can run
cmsInt32Number _cmsThrIdealThreadCount(void)
{
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
return sysinfo.dwNumberOfProcessors; //Returns the number of processors in the system.
}
#else
// Rest of the wide world
#include <pthread.h>
#include <unistd.h>
// To pass parameter to the thread
typedef struct
{
_cmsTransform2Fn worker;
_cmsWorkSlice* param;
} thread_adaptor_param;
// This is the native thread on pthread
static
void* thread_adaptor(void* p)
{
thread_adaptor_param* ap = (thread_adaptor_param*)p;
_cmsWorkSlice* s = ap->param;
ap->worker(s->CMMcargo, s->InputBuffer, s->OutputBuffer,
s->PixelsPerLine, s->LineCount, s->Stride);
_cmsFree(0, p);
return NULL;
}
// This function creates a thread and executes it. The thread calls the worker function
// with the given parameters.
cmsHANDLE _cmsThrCreateWorker(cmsContext ContextID, _cmsTransform2Fn worker, _cmsWorkSlice* param)
{
pthread_t threadId;
thread_adaptor_param* p;
p = (thread_adaptor_param*)_cmsMalloc(0, sizeof(thread_adaptor_param));
if (p == NULL) return NULL;
p->worker = worker;
p->param = param;
int err = pthread_create(&threadId, NULL, thread_adaptor, p);
if (err != 0)
{
cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot create thread [pthread error %d]", err);
return NULL;
}
else
return (cmsHANDLE) threadId;
}
// Waits until given thread is ended
void _cmsThrJoinWorker(cmsContext ContextID, cmsHANDLE hWorker)
{
int err = pthread_join((pthread_t)hWorker, NULL);
if (err != 0)
{
cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot join thread [pthread error %d]", err);
}
}
cmsInt32Number _cmsThrIdealThreadCount(void)
{
long cores = sysconf(_SC_NPROCESSORS_ONLN);
if (cores == -1L)
return 1;
else
return (cmsInt32Number)cores;
}
#endif
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