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IndexWrapper-inl.h
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the CC-by-NC license found in the
* LICENSE file in the root directory of this source tree.
*/
// Copyright 2004-present Facebook. All Rights Reserved.
#include "../../FaissAssert.h"
namespace faiss { namespace gpu {
template <typename GpuIndex>
IndexWrapper<GpuIndex>::IndexWrapper(
int numGpus,
std::function<std::unique_ptr<GpuIndex>(GpuResources*, int)> init) {
FAISS_ASSERT(numGpus <= faiss::gpu::getNumDevices());
for (int i = 0; i < numGpus; ++i) {
auto res = std::unique_ptr<faiss::gpu::StandardGpuResources>(
new StandardGpuResources);
subIndex.emplace_back(init(res.get(), i));
resources.emplace_back(std::move(res));
}
if (numGpus > 1) {
// create proxy
proxyIndex =
std::unique_ptr<faiss::gpu::IndexProxy>(new faiss::gpu::IndexProxy);
for (auto& index : subIndex) {
proxyIndex->addIndex(index.get());
}
}
}
template <typename GpuIndex>
faiss::Index*
IndexWrapper<GpuIndex>::getIndex() {
if ((bool) proxyIndex) {
return proxyIndex.get();
} else {
FAISS_ASSERT(!subIndex.empty());
return subIndex.front().get();
}
}
template <typename GpuIndex>
void
IndexWrapper<GpuIndex>::runOnIndices(std::function<void(GpuIndex*)> f) {
if ((bool) proxyIndex) {
proxyIndex->runOnIndex(
[f](faiss::Index* index) {
f(dynamic_cast<GpuIndex*>(index));
});
} else {
FAISS_ASSERT(!subIndex.empty());
f(subIndex.front().get());
}
}
template <typename GpuIndex>
void
IndexWrapper<GpuIndex>::setNumProbes(int nprobe) {
runOnIndices([nprobe](GpuIndex* index) {
index->setNumProbes(nprobe);
});
}
} }
faiss::gpu::IndexProxy
Definition: IndexProxy.h:25
faiss::Index
Definition: Index.h:61