github.com/rohankumardubey/aresdb@v0.0.2-0.20190517170215-e54e3ca06b9c/query/algorithm.cu (about)

     1  //  Copyright (c) 2017-2018 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #include <thrust/transform.h>
    16  #include <algorithm>
    17  #include <exception>
    18  #include "query/algorithm.hpp"
    19  #include "query/iterator.hpp"
    20  #include "query/utils.hpp"
    21  
    22  CGoCallResHandle InitIndexVector(uint32_t *indexVector, uint32_t start,
    23                       int indexVectorLength, void *cudaStream, int device) {
    24    CGoCallResHandle resHandle = {nullptr, nullptr};
    25    try {
    26  #ifdef RUN_ON_DEVICE
    27      cudaSetDevice(device);
    28  #endif
    29      thrust::sequence(
    30          GET_EXECUTION_POLICY(reinterpret_cast<cudaStream_t>(cudaStream)),
    31          indexVector, indexVector + indexVectorLength, start);
    32  
    33      CheckCUDAError("InitIndexVector");
    34    }
    35    catch (std::exception &e) {
    36      std::cerr << "Exception happend when doing InitIndexVector:" << e.what()
    37                << std::endl;
    38      resHandle.pStrErr = strdup(e.what());
    39    }
    40    return resHandle;
    41  }