90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
/**
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* Copyright (c) 2016-present, Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "caffe2/core/blob.h"
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#include "caffe2/core/init.h"
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#include "caffe2/core/tensor.h"
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#include "caffe2/core/logging.h"
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// We will be lazy and just use the whole namespace.
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using namespace caffe2;
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int main(int argc, char** argv) {
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caffe2::GlobalInit(&argc, &argv);
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caffe2::ShowLogInfoToStderr();
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LOG(INFO) <<
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"This script corresponds to the Blob part of the Caffe2 C++ "
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"tutorial.";
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LOG(INFO) << "Let's create a blob myblob.";
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Blob myblob;
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LOG(INFO) << "Let's set it to int and set the value to 10.";
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int* myint = myblob.GetMutable<int>();
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*myint = 10;
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LOG(INFO)
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<< "Is the blob type int? "
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<< myblob.IsType<int>();
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LOG(INFO)
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<< "Is the blob type float? "
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<< myblob.IsType<float>();
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const int& myint_const = myblob.Get<int>();
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LOG(INFO)
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<< "The value of the int number stored in the blob is: "
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<< myint_const;
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LOG(INFO)
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<< "Let's try to get a float pointer. This will trigger an exception.";
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try {
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const float& myfloat = myblob.Get<float>();
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LOG(FATAL) << "This line should never happen.";
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} catch (std::exception& e) {
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LOG(INFO)
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<< "As expected, we got an exception. Its content says: "
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<< e.what();
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}
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LOG(INFO) <<
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"However, we can change the content type (and destroy the old "
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"content) by calling GetMutable. Let's change it to double.";
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double* mydouble = myblob.GetMutable<double>();
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*mydouble = 3.14;
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LOG(INFO) << "The new content is: " << myblob.Get<double>();
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LOG(INFO) <<
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"If we have a pre-created object, we can use Reset() to transfer the "
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"object to a blob.";
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std::string* pvec = new std::string();
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myblob.Reset(pvec); // no need to release pvec, myblob takes ownership.
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LOG(INFO) << "Is the blob now of type string? "
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<< myblob.IsType<std::string>();
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LOG(INFO) << "This concludes the blob tutorial.";
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return 0;
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}
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