WDL/rtaudiomidi/RtError.h

   1 /************************************************************************/
   2 /*! \class RtError
   3     \brief Exception handling class for RtAudio & RtMidi.
   4
   5     The RtError class is quite simple but it does allow errors to be
   6     "caught" by RtError::Type. See the RtAudio and RtMidi
   7     documentation to know which methods can throw an RtError.
   8
   9 */
  10 /************************************************************************/
  11
  12 #ifndef RTERROR_H
  13 #define RTERROR_H
  14
  15 #include <exception>
  16 #include <iostream>
  17 #include <string>
  18
  19 class RtError : public std::exception
  20 {
  21  public:
  22   //! Defined RtError types.
  23   enum Type {
  24     WARNING,           /*!< A non-critical error. */
  25     DEBUG_WARNING,     /*!< A non-critical error which might be useful for debugging. */
  26     UNSPECIFIED,       /*!< The default, unspecified error type. */
  27     NO_DEVICES_FOUND,  /*!< No devices found on system. */
  28     INVALID_DEVICE,    /*!< An invalid device ID was specified. */
  29     MEMORY_ERROR,      /*!< An error occured during memory allocation. */
  30     INVALID_PARAMETER, /*!< An invalid parameter was specified to a function. */
  31     INVALID_USE,       /*!< The function was called incorrectly. */
  32     DRIVER_ERROR,      /*!< A system driver error occured. */
  33     SYSTEM_ERROR,      /*!< A system error occured. */
  34     THREAD_ERROR       /*!< A thread error occured. */
  35   };
  36
  37   //! The constructor.
  38   RtError( const std::string& message, Type type = RtError::UNSPECIFIED ) throw() : message_(message), type_(type) {}
  39
  40   //! The destructor.
  41   virtual ~RtError( void ) throw() {}
  42
  43   //! Prints thrown error message to stderr.
  44   virtual void printMessage( void ) const throw() { std::cerr << '\n' << message_ << "\n\n"; }
  45
  46   //! Returns the thrown error message type.
  47   virtual const Type& getType(void) const throw() { return type_; }
  48
  49   //! Returns the thrown error message string.
  50   virtual const std::string& getMessage(void) const throw() { return message_; }
  51
  52   //! Returns the thrown error message as a c-style string.
  53   virtual const char* what( void ) const throw() { return message_.c_str(); }
  54
  55  protected:
  56   std::string message_;
  57   Type type_;
  58 };
  59
  60 #endif