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#pragma once

/**
 * \file
 * \brief C++ exception semantics for CUDA error codes
 */

#include <cuda_runtime.h>
#include <iosfwd>
#include <stdexcept>

#include "cutlass/util/platform.h"

namespace cutlass {

/// C++ exception wrapper for CUDA \p cudaError_t
class cuda_exception : public std::exception {
 public:
  /// Constructor
  cuda_exception(const char* msg = "", cudaError_t err = cudaErrorUnknown) : msg(msg), err(err) {}

  /// Returns the underlying CUDA \p cudaError_t
  cudaError_t cudaError() const { return err; }

 protected:
  /// Explanatory string
  const char* msg;

  /// Underlying CUDA \p cudaError_t
  cudaError_t err;
};

/// Writes a cudaError_t to an output stream
inline std::ostream& operator<<(std::ostream& out, cudaError_t result) {
  return out << cudaGetErrorString(result);
}

/// Writes a cuda_exception instance to an output stream
inline std::ostream& operator<<(std::ostream& out, cuda_exception const& e) {
  return out << e.what() << ": " << e.cudaError();
}

}  // namespace cutlass