EasyOpenCL<T>::EasyOpenCL(bool printData) {
info = printData;
cl_uint numPlatforms; //the NO. of platforms
// Fetch the different platforms on which we can run our kernel
cl_platform_id platform = NULL;
status = clGetPlatformIDs(0, NULL, &numPlatforms);
checkError("clGetPlatformIDs");
// Take the first platform available
if (numPlatforms > 0)
{
cl_platform_id* platforms = (cl_platform_id*) malloc(numPlatforms * sizeof(cl_platform_id));
status = clGetPlatformIDs(numPlatforms, platforms, NULL);
platform = platforms[0];
free(platforms);
}
// Get the devices which are available on said platform
cl_uint numDevices = 0;
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 0, NULL, &numDevices);
if (numDevices)
{
//Use the first GPU available
devices = (cl_device_id*)malloc(numDevices * sizeof(cl_device_id));
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, numDevices, devices, NULL);
}
else
{
// If there is no GPU support, fall back to the CPU
if(info) {
std::cout << "No supported GPU device available." << std::endl;
std::cout << "Falling back to using the CPU." << std::endl;
std::cout << std::endl;
}
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, 0, NULL, &numDevices);
devices = (cl_device_id*)malloc(numDevices * sizeof(cl_device_id));
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, numDevices, devices, NULL);
}
//Print the data of the selected device
if (info) {
printDeviceProperty(*devices);
}
//Create an OpenCL context and a command queue
context = clCreateContext(NULL, 1, devices, NULL, NULL, &status);
checkError("clCreateContext");
commandQueue = clCreateCommandQueueWithProperties(context, devices[0], 0, &status);
checkError("clCreateCommandQueueWithProperties");
}
OpenCLFramework<T>::OpenCLFramework(bool printData) {
info = printData;
cl_uint numPlatforms; //the NO. of platforms
cl_platform_id platform = NULL; //the chosen platform
status = clGetPlatformIDs(0, NULL, &numPlatforms);
checkError("clGetPlatformIDs");
//Just take the first platform available
if (numPlatforms > 0)
{
cl_platform_id* platforms = (cl_platform_id*)malloc(numPlatforms* sizeof(cl_platform_id));
status = clGetPlatformIDs(numPlatforms, platforms, NULL);
platform = platforms[0];
free(platforms);
}
//Try to get the GPU, if not available, take the CPU
cl_uint numDevices = 0;
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, 0, NULL, &numDevices);
checkError("clGetDeviceIDs");
if (numDevices == 0) //no GPU available.
{
std::cout << "No GPU device available." << std::endl;
std::cout << "Choose CPU as default device." << std::endl;
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, 0, NULL, &numDevices);
devices = (cl_device_id*)malloc(numDevices * sizeof(cl_device_id));
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, numDevices, devices, NULL);
}
else
{
//Pick the GPU
devices = (cl_device_id*)malloc(numDevices * sizeof(cl_device_id));
status = clGetDeviceIDs(platform, CL_DEVICE_TYPE_GPU, numDevices, devices, NULL);
}
//Print the data about the picked device
if (info) {
printDeviceProperty(*devices);
}
//Create an OpenCL context and a command queue
context = clCreateContext(NULL, 1, devices, NULL, NULL, &status);
checkError("clCreateContext");
commandQueue = clCreateCommandQueueWithProperties(context, devices[0], 0, &status);
checkError("clCreateCommandQueueWithProperties");
}
