#ifndef CAFFE2_OPERATORS_IF_OP_H_
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#define CAFFE2_OPERATORS_IF_OP_H_
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#include "caffe2/core/context.h"
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#include "caffe2/core/logging.h"
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#include "caffe2/core/operator.h"
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namespace caffe2 {
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template <class Context>
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class IfOp final : public Operator<Context> {
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public:
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explicit IfOp(const OperatorDef& operator_def, Workspace* ws)
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: Operator<Context>(operator_def, ws) {
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CAFFE_ENFORCE(
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this->template HasSingleArgumentOfType<NetDef>("then_net"),
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"then_net must be specified in If operator");
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auto then_net_def =
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this->template GetSingleArgument<NetDef>("then_net", NetDef());
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then_net_ = CreateNet(then_net_def, ws);
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CAFFE_ENFORCE(then_net_, "Failed to initialize then subnet");
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if (this->template HasSingleArgumentOfType<NetDef>("else_net")) {
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auto else_net_def =
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this->template GetSingleArgument<NetDef>("else_net", NetDef());
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else_net_ = CreateNet(else_net_def, ws);
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CAFFE_ENFORCE(else_net_, "Failed to initialize else subnet");
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}
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}
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USE_OPERATOR_CONTEXT_FUNCTIONS;
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bool RunOnDevice() override {
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CAFFE_ENFORCE(
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this->InputIsTensorType(0, Context::GetDeviceType()),
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"Invalid condition in If operator: tensor expected");
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const auto& condition = Input(0);
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CAFFE_ENFORCE_EQ(
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condition.numel(),
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1,
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"Invalid condition tensor in If operator: single value expected");
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auto conditionValue = *condition.template data<bool>();
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if (conditionValue) {
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return then_net_->Run();
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} else if (else_net_) {
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return else_net_->Run();
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}
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return true;
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}
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private:
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std::unique_ptr<NetBase> then_net_;
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std::unique_ptr<NetBase> else_net_;
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};
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} // namespace caffe2
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#endif // CAFFE2_OPERATORS_IF_OP_H_
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