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Inside Macintosh: Memory /
Chapter 2 - Memory Manager / Memory Manager Reference
Memory Manager Routines / Setting the Properties of Relocatable Blocks

HUnlock

You can use the HUnlock procedure to unlock a relocatable block so that it is free to move in its heap zone.

PROCEDURE HUnlock (h: Handle);
h
A handle to a relocatable block.
DESCRIPTION
The HUnlock procedure unlocks the relocatable block to which h is a handle, allowing it to be moved within its heap zone. If the block is already unlocked, HUnlock does nothing.

ASSEMBLY-LANGUAGE INFORMATION
The registers on entry and exit for HUnlock are
Registers on entry
A0Handle to unlock
Registers on exit
D0Result code

RESULT CODES
noErr0No error
nilHandleErr-109NIL master pointer
memWZErr-111Attempt to operate on a free block
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3 JUL 1996

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