| 355 | |
| 356 | |
| 357 | int discoverCLPlatforms( cl_device_type deviceType, |
| 358 | std::vector< cl_platform_id >& platforms, |
| 359 | std::vector< std::vector< cl_device_id > >& devices ) |
| 360 | { |
| 361 | cl_int status = 0; |
| 362 | |
| 363 | /* |
| 364 | * Find all OpenCL platforms this system has to offer. |
| 365 | */ |
| 366 | |
| 367 | cl_uint numPlatforms = 0; |
| 368 | cl_platform_id platform = NULL; |
| 369 | OPENCL_V_THROW(::clGetPlatformIDs(0, NULL, &numPlatforms), |
| 370 | "Getting number of platforms( ::clGetPlatformsIDs() )"); |
| 371 | |
| 372 | if (numPlatforms > 0) |
| 373 | { |
| 374 | platforms.resize( numPlatforms ); |
| 375 | devices.resize( numPlatforms ); |
| 376 | OPENCL_V_THROW(::clGetPlatformIDs(numPlatforms, &platforms[0], NULL), |
| 377 | "Getting Platform Id's ( ::clGetPlatformsIDs() )"); |
| 378 | |
| 379 | if (NULL == platforms[0]) |
| 380 | { |
| 381 | throw std::runtime_error("No appropriate OpenCL platform could be found"); |
| 382 | } |
| 383 | |
| 384 | /* |
| 385 | * Now, for each platform get all available devices matching deviceType. |
| 386 | */ |
| 387 | for (unsigned int i = 0; i < numPlatforms; ++i) |
| 388 | { |
| 389 | // Get the device list for deviceType. |
| 390 | // |
| 391 | cl_uint numDevices = 0; |
| 392 | OPENCL_V_WARN(::clGetDeviceIDs(platforms[i], deviceType, 0, NULL, &numDevices), |
| 393 | "Getting OpenCL devices ( ::clGetDeviceIDs() )"); |
| 394 | if (0 == numDevices) |
| 395 | { |
| 396 | // OPENCL_V_WARN(CLFFT_DEVICE_NOT_AVAILABLE, "No devices available"); |
| 397 | continue; |
| 398 | } |
| 399 | |
| 400 | devices[i].resize(numDevices); |
| 401 | OPENCL_V_THROW(::clGetDeviceIDs(platforms[i], deviceType, numDevices, &(devices[i])[0], NULL), |
| 402 | "Getting OpenCL deviceIDs ( ::clGetDeviceIDs() )"); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | std::vector< cl_device_id > initializeCL( cl_device_type deviceType, |
| 410 | cl_int deviceId, |