Annotation Glossary: Jsonrpc-GLib Reference Manual

# 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

optional

  NULL may be passed instead of a pointer to a location.

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.