Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Chapter 2 - Memory Manager / Memory Manager Reference

Memory Manager Routines / Accessing Heap Zones

PtrZone
If you have allocated a nonrelocatable block and need to know in which zone it lies, you can use the PtrZone function.
FUNCTION PtrZone (p: Ptr): THz;
p
A pointer to a nonrelocatable block.

DESCRIPTION
The PtrZone function returns a pointer to the heap zone containing the nonrelocatable block pointed to by p.
In case of an error, the result returned by PtrZone is undefined and should be ignored.

ASSEMBLY-LANGUAGE INFORMATION
The registers on entry and exit for PtrZone are
Registers on entry
A0 Pointer whose zone is to be found

Registers on exit
A0 Pointer to heap zone of nonrelocatable block
D0 Result code

RESULT CODES
noErr 0 No error
memWZErr -111 Attempt to operate on a free block

Registers on entry
A0	Pointer whose zone is to be found

Registers on exit
A0	Pointer to heap zone of nonrelocatable block
D0	Result code

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noErr	0	No error
memWZErr	-111	Attempt to operate on a free block

Legacy Document

PtrZone

DESCRIPTION

ASSEMBLY-LANGUAGE INFORMATION

RESULT CODES noErr0No error memWZErr-111Attempt to operate on a free block

RESULT CODES
noErr 0 No error
memWZErr -111 Attempt to operate on a free block