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Shrinkable Dynamic Areas
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_DynamicArea
» Shrinkable Dynamic Areas
Notes
Shrinkable areas are created using OS_DynamicArea 0 with bit 9 of R4 set. They may be shrunk by the kernel when free memory is about to be exhausted.
Shrinkable areas must have a handler routine. A new handler reason code is used for Shrinkable areas: TestShrink.
Shrinkable areas should be used sparingly due to the load on the kernel whenever free memory must be calculated (e.g. for every Wimp_SlotSize call).