Annotation Glossary

C

closure

This parameter is a 'user_data', for callbacks; many bindings can pass NULL here.

D

destroy

This parameter is a 'destroy_data', for callbacks.

N

not nullable

NULL must not be passed as the value in, out, in-out; or as a return value.

nullable

NULL may be passed as the value in, out, in-out; or as a return value.

O

out

Parameter for returning results. Default is transfer full.

S

scope call

The callback is valid only during the call to the method.

T

transfer full

Free data after the code is done.

transfer none

Don't free data after the code is done.