[ Version ( since = "2.50" ) ]
public void set_writer_func (owned LogWriterFunc func)
Set a writer function which will be called to format and write out each log message.
Each program should set a writer function, or the default writer (writer_default ) will be used.
Libraries **must not** call this function — only programs are allowed to install a writer function, as there must be a single, central point where log messages are formatted and outputted.
There can only be one writer function. It is an error to set more than one.
| func |
log writer function, which must not be null |
| user_data |
user data to pass to |
| user_data_free |
function to free |