Event

...
#define E_READ         0x00000001
#define E_WRITE        0x00000002
#define E_EXCEPTION    0x00000004
#define E_TIMEOUT      0x00000008
#define E_ASYNC        0x00000010

#define E_AGGRESSIVE_NONE 0
#define E_AGGRESSIVE_LOW  1
#define E_AGGRESSIVE_MED  2
#define E_AGGRESSIVE_HIGH 3
...
typedef struct ec_event_io_opset
{
  AcceptFunc event_accept;
  ReadFunc event_read;
  WriteFunc event_write;
  CloseFunc event_close;
  SendFileFunc  event_sendfile;
} event_io_opset;

struct _Event
{
  struct timeval trigger;
  void *io_data;
  event_io_opset *io_opset;
  int aggressive:4;
  int trace:1;
  int unused:27;
  int mask;
  int fd;
  EventFunc callback;
  void *closure;
  pthread_t scheduled_thread;
};