text: // Licensed to the Apache Software Foundation (ASF) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The ASF licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  #ifndef GANDIVA_COMPILED_EXPR_H
  #define GANDIVA_COMPILED_EXPR_H
  
  #include "gandiva/llvm_includes.h"
  #include "gandiva/value_validity_pair.h"
  
  namespace gandiva {
  
  using EvalFunc = int (*)(uint8_t** buffers, uint8_t** local_bitmaps,
                           int64_t execution_ctx_ptr, int64_t record_count);
  
  /// \brief Tracks the compiled state for one expression.
  class CompiledExpr {
   public:
    CompiledExpr(ValueValidityPairPtr value_validity, FieldDescriptorPtr output,
                 llvm::Function* ir_function)
        : value_validity_(value_validity),
          output_(output),
          ir_function_(ir_function),
          jit_function_(NULL) {}
  
    ValueValidityPairPtr value_validity() const { return value_validity_; }
  
    FieldDescriptorPtr output() const { return output_; }
  
    llvm::Function* ir_function() const { return ir_function_; }
  
    EvalFunc jit_function() const { return jit_function_; }
  
    void set_jit_function(EvalFunc jit_function) { jit_function_ = jit_function; }
  
   private:
    // value & validities for the expression tree (root)
    ValueValidityPairPtr value_validity_;
  
    // output field
    FieldDescriptorPtr output_;
  
    // IR function in the generated code
    llvm::Function* ir_function_;
  
    // JIT function in the generated code (set after the module is optimised and finalized)
    EvalFunc jit_function_;
  };
  
  }  // namespace gandiva
  
  #endif  // GANDIVA_COMPILED_EXPR_H
  