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Fix OpenCL GPU enumeration error handling #50

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Fix OpenCL GPU enumeration error handling #50

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42 changes: 32 additions & 10 deletions profanity.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -33,24 +33,46 @@ std::string readFile(const char * const szFilename)
return contents.str();
}

std::vector<cl_device_id> getAllDevices(cl_device_type deviceType = CL_DEVICE_TYPE_GPU)
{
std::vector<cl_device_id> getAllDevices(cl_device_type deviceType = CL_DEVICE_TYPE_GPU) {
std::vector<cl_device_id> vDevices;

cl_uint platformIdCount = 0;
clGetPlatformIDs (0, NULL, &platformIdCount);
cl_int err = clGetPlatformIDs(0, NULL, &platformIdCount);
if (err != CL_SUCCESS || platformIdCount == 0) {
std::cerr << "warning: no OpenCL platforms found, err = " << err << std::endl;
return vDevices;
}

std::vector<cl_platform_id> platformIds(platformIdCount);
err = clGetPlatformIDs(platformIdCount, platformIds.data(), NULL);
if (err != CL_SUCCESS) {
std::cerr << "warning: failed to enumerate OpenCL platforms, err = " << err << std::endl;
return vDevices;
}

std::vector<cl_platform_id> platformIds (platformIdCount);
clGetPlatformIDs (platformIdCount, platformIds.data (), NULL);
for (auto it = platformIds.cbegin(); it != platformIds.cend(); ++it) {
cl_uint countDevice = 0;

for( auto it = platformIds.cbegin(); it != platformIds.cend(); ++it ) {
cl_uint countDevice;
clGetDeviceIDs(*it, deviceType, 0, NULL, &countDevice);
err = clGetDeviceIDs(*it, deviceType, 0, NULL, &countDevice);
if (err != CL_SUCCESS || countDevice == 0) {
char platformName[256] = {0};
clGetPlatformInfo(*it, CL_PLATFORM_NAME, sizeof(platformName), platformName, NULL);
std::cerr << "warning: skipping OpenCL platform without usable GPU devices: "
<< platformName << ", err = " << err << std::endl;
continue;
}

std::vector<cl_device_id> deviceIds(countDevice);
clGetDeviceIDs(*it, deviceType, countDevice, deviceIds.data(), &countDevice);
err = clGetDeviceIDs(*it, deviceType, countDevice, deviceIds.data(), &countDevice);
if (err != CL_SUCCESS) {
char platformName[256] = {0};
clGetPlatformInfo(*it, CL_PLATFORM_NAME, sizeof(platformName), platformName, NULL);
std::cerr << "warning: failed to get GPU devices from platform: "
<< platformName << ", err = " << err << std::endl;
continue;
}

std::copy( deviceIds.begin(), deviceIds.end(), std::back_inserter(vDevices) );
std::copy(deviceIds.begin(), deviceIds.end(), std::back_inserter(vDevices));
}

return vDevices;
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