std::pair<std::vector<cl::Context>, std::vector<command_queue>>
queue_list(DevFilter &&filter, cl_command_queue_properties properties = 0) {
std::vector<cl::Context> context;
std::vector<command_queue> queue;
std::vector<cl::Platform> platforms;
cl::Platform::get(&platforms);
for(auto p = platforms.begin(); p != platforms.end(); p++) {
std::vector<cl::Device> device;
std::vector<cl::Device> dev_list;
p->getDevices(CL_DEVICE_TYPE_ALL, &dev_list);
for(auto d = dev_list.begin(); d != dev_list.end(); d++) {
if (!d->getInfo<CL_DEVICE_AVAILABLE>()) continue;
if (!filter(*d)) continue;
device.push_back(*d);
}
if (device.empty()) continue;
for(auto d = device.begin(); d != device.end(); d++)
try {
context.push_back(cl::Context(std::vector<cl::Device>(1, *d)));
queue.push_back(command_queue(context.back(), *d, properties));
} catch(const cl::Error&) {
// Something bad happened. Better skip this device.
}
}
return std::make_pair(context, queue);
}
std::vector<cl::Device> device_list(DevFilter&& filter) {
std::vector<cl::Device> device;
std::vector<cl::Platform> platforms;
cl::Platform::get(&platforms);
for(auto p = platforms.begin(); p != platforms.end(); p++) {
std::vector<cl::Device> dev_list;
p->getDevices(CL_DEVICE_TYPE_ALL, &dev_list);
for(auto d = dev_list.begin(); d != dev_list.end(); d++) {
if (!d->getInfo<CL_DEVICE_AVAILABLE>()) continue;
if (!filter(*d)) continue;
device.push_back(*d);
}
}
return device;
}