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Inside Macintosh: Memory /

Chapter 2 - Memory Manager / Memory Manager Reference

Memory Manager Routines / Allocating and Releasing Relocatable Blocks of Memory

DisposeHandle

When you are completely done with a relocatable block, call the DisposeHandle procedure to free it and its master pointer for other uses.

PROCEDURE DisposeHandle (h: Handle);

h

A handle to a relocatable block.

DESCRIPTION

The DisposeHandle procedure releases the memory occupied by the relocatable block whose handle is h. It also frees the handle's master pointer for other uses.

WARNING

After a call to DisposeHandle, all handles to the released block become invalid and should not be used again. Any subsequent calls to DisposeHandle using an invalid handle might damage the master pointer list.

Do not use DisposeHandle to dispose of a handle obtained from the Resource Manager (for example, by a previous call to GetResource); use ReleaseResource instead. If, however, you have called DetachResource on a resource handle, you should dispose of the storage by calling DisposeHandle.

SPECIAL CONSIDERATIONS

Because DisposeHandle purges memory, you should not call it at interrupt time.

ASSEMBLY-LANGUAGE INFORMATION

The registers on entry and exit for DisposeHandle are

Registers on entry
A0	Handle to the relocatable block to be disposed of

Registers on exit
D0	Result code

RESULT CODES

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