A bitwise combination representing a condition to watch for on an event source
Value | Symbolic name | Description |
| 1 | Gobject::IO_IN | There is data to read |
| 4 | Gobject::IO_OUT | Data can be written (without blocking) |
| 2 | Gobject::IO_PRI | There is urgent data to read |
| 8 | Gobject::IO_ERR | Error condition |
| 16 | Gobject::IO_HUP | Hung up (the connection has been broken, usually for pipes and sockets) |
| 32 | Gobject::IO_NVAL | Invalid request. The file descriptor is not open |