A fast and easily customised operating system
for ARM devices
Null_Reason
Programmer's Reference Manuals
» Part 7 - The Desktop
» The Window Manager
» SWI Calls
» Wimp_Poll
» Reason Codes
» Null_Reason
Null_Reason
(Reason Code 0)
This code is returned from Wimp_Poll and indicates that no other codes need to be issued.
Notes
Assuming an application does not need to respond to this reason code, it is highly advisable to mask it out. This will greatly improve the responsiveness of the system as Wimp_Poll will never give the application control, for it simply to ignore the reason code.