/*!
 *  Copyright (c) 2016 by Contributors
 * \file runtime_base.h
 * \brief Base of all C APIs
 */
#ifndef DGL_RUNTIME_RUNTIME_BASE_H_
#define DGL_RUNTIME_RUNTIME_BASE_H_

#include <dgl/runtime/c_runtime_api.h>

#include <stdexcept>

/*! \brief  macro to guard beginning and end section of all functions */
#define API_BEGIN() try {
/*! \brief every function starts with API_BEGIN();
     and finishes with API_END() or API_END_HANDLE_ERROR */
#define API_END()                           \
  }                                         \
  catch (std::runtime_error & _except_) {   \
    return DGLAPIHandleException(_except_); \
  }                                         \
  return 0;  // NOLINT(*)
/*!
 * \brief every function starts with API_BEGIN();
 *   and finishes with API_END() or API_END_HANDLE_ERROR
 *   The finally clause contains procedure to cleanup states when an error
 * happens.
 */
#define API_END_HANDLE_ERROR(Finalize)      \
  }                                         \
  catch (std::runtime_error & _except_) {   \
    Finalize;                               \
    return DGLAPIHandleException(_except_); \
  }                                         \
  return 0;  // NOLINT(*)

/*!
 * \brief handle exception throwed out
 * \param e the exception
 * \return the return value of API after exception is handled
 */
inline int DGLAPIHandleException(const std::runtime_error &e) {
  DGLAPISetLastError(e.what());
  return -1;
}

#endif  // DGL_RUNTIME_RUNTIME_BASE_H_
