A set of flags that can be OR'd together to indicate which are desired

• none - No I/O is desired (generally useless)
• read - Reading is desired
• write - Writing is desired
• error - Error channel input is desired

enum Efl.Loop_Handler_Flags {
    none: 0,
    read: 1,
    write: 2,
    error: 4
}

typedef enum {
    EFL_LOOP_HANDLER_FLAGS_NONE = 0,
    EFL_LOOP_HANDLER_FLAGS_READ = 1,
    EFL_LOOP_HANDLER_FLAGS_WRITE = 2,
    EFL_LOOP_HANDLER_FLAGS_ERROR = 4
} Efl_Loop_Handler_Flags;