Revision [418]
This is an old revision of ioProcessEvents made by JohnMcIntosh on 2010-09-12 21:42:29.
sqInt ioProcessEvents(void)
Parms: NONE
return: NONE, fake return of zero
From: Interpreter
Why:
Process operating system UI events and do housekeeping
Responsibility:
Historically this was called by ioPeekKeystroke, ioGetKeystroke, ioMousePoint, ioGetButtonState, an ioGetNextEvent to process UI events in the pure polling pre event driven VM of the 90's. It is also called by the checkForInterrupt logic every 200ms or so.
On some platforms this routine is used to exit() the VM based on a quit now flag.
MacIntosh
os-9/OSXCarbon
Morphic invokes ioGetNextEvent every 1/60 of a second so we use this logic to call aioPoll to service Socket states and also to service pending screen flushes. We also check the quit now flag and may exit()
Cocoa:
See iPhone, but subclassed to also invoke NSApp sendEvent: after running the run loop.
iPhone
Clone of macintosh, but includes logic to run the runloop
Unix
Calls XNextEvent, and aioPoll
Windows
Some flavours of windows require checking for WM_PAINT, deal with squeak being a plugin window, confirm if browser is still alive (if plugin)
BUGS
How often this is called is debatable...
