SlotVRemove

SlotVRemove Remove vertical retrace interrupt task for a slot

#include <Retrace.h> Vert. Retrace Mgr

OSErr SlotVRemove(vblTaskPtr, theSlot );

QElemPtr vblTaskPtr ; address of a 14-byte VBLTask structure

short theSlot; slot whose queue the task should be removed from

returns 16-bit Error Code; 0=no error

SlotVRemove removes a previously- installed vertical retrace task from the

VBL queue for a particular slot and stops the task from being executed on

subsequent retrace interrupts.

vblTaskPtr is the address of a 14-byte VBLTask structure you installed

previously via SlotVInstall.

theSlot is the slot number of the slot whose queue the task should be

removed from. You can use the Slot Manager routine SGetSRsrc

to index through all the slots on a particular machine.

Returns: an Error Code indicating success or failure of the function. It will

be one of:

noErr (0) no error

qErr (-1) Invalid queue element

slotNumErr (-360) Invalid slot number

Notes: Instead of maintaining a single vertical retrace queue, the

Vertical Retrace Manager maintains a separate queue for each video

device; associated with that queue is the rate at which the device's vertical

retrace interrupt occurs. When interrupts occur for a particular video

slot, the Vertical Retrace Manager executes any tasks in the queue for

that slot.

It is probably NOT wise to remove tasks you did not install.

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