72 lines
1.6 KiB
C++
72 lines
1.6 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <faiss/impl/FaissAssert.h>
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namespace faiss { namespace gpu {
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template <typename GpuIndex>
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IndexWrapper<GpuIndex>::IndexWrapper(
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int numGpus,
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std::function<std::unique_ptr<GpuIndex>(GpuResources*, int)> init) {
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FAISS_ASSERT(numGpus <= faiss::gpu::getNumDevices());
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for (int i = 0; i < numGpus; ++i) {
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auto res = std::unique_ptr<faiss::gpu::StandardGpuResources>(
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new StandardGpuResources);
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subIndex.emplace_back(init(res.get(), i));
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resources.emplace_back(std::move(res));
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}
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if (numGpus > 1) {
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// create proxy
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replicaIndex =
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std::unique_ptr<faiss::IndexReplicas>(new faiss::IndexReplicas);
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for (auto& index : subIndex) {
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replicaIndex->addIndex(index.get());
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}
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}
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}
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template <typename GpuIndex>
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faiss::Index*
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IndexWrapper<GpuIndex>::getIndex() {
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if ((bool) replicaIndex) {
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return replicaIndex.get();
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} else {
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FAISS_ASSERT(!subIndex.empty());
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return subIndex.front().get();
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}
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}
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template <typename GpuIndex>
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void
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IndexWrapper<GpuIndex>::runOnIndices(std::function<void(GpuIndex*)> f) {
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if ((bool) replicaIndex) {
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replicaIndex->runOnIndex(
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[f](int, faiss::Index* index) {
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f(dynamic_cast<GpuIndex*>(index));
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});
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} else {
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FAISS_ASSERT(!subIndex.empty());
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f(subIndex.front().get());
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}
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}
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template <typename GpuIndex>
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void
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IndexWrapper<GpuIndex>::setNumProbes(int nprobe) {
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runOnIndices([nprobe](GpuIndex* index) {
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index->setNumProbes(nprobe);
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});
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}
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} }
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