DragonFly On-Line Manual Pages
XFree(3) XLIB FUNCTIONS XFree(3)
XFree - free client data
int XFree(void *data);
data Specifies the data that are to be freed.
The XFree function is a general-purpose Xlib routine that frees the
specified data. You must use it to free any objects that were
allocated by Xlib, unless an alternate function is explicitly specified
for the object.
If data is NULL, no operation is performed.
Xlib - C Language X Interface
X Version 11 libX11 1.6.8 XFree(3)