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UDF - UDS Library
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- !! UDFs Explained !!
- !! UDFs vs Subroutines !!
- !!A Quick Course on UDFs
- !!Calling UDF from Main Script
- !!Check if UDF is Defined
- !!Debugging UDFs
- !!Passing Variables in UDFs
- !!UDFs and Gotos
- !!Variables inside and outside a UDF
- Bitmask Deciphering UDF
- Content Addressable Memory
- Detlevs UDFs
- Free WinBatch Resources UDF
- Get Pixel Deluxe with Zoom
- Global Memory Status
- IsIpInRange
- Optional Parameters
- PauseCheck UDF
- RouteAdd - Create a Static Route - UDF
- Sample UDFs from Stan Littlefield
- Serial SendkeyLock UDF
- The xGlobal Extender
- TIF Page Counter
- UDF UDS Parameter Limit
- UDS and Global Variables
- User Defined Function - memory usage
- VarTypeEx to Detect Pointer Variables
- WIL Function List
- Write to a log file UDF
- Zip File Lister
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User Defined Function - memory usage
Keywords: User Defined Function - memory usage
Question:
If a UDF is called many, many times will it reuse memory or will it eventually run out. Is the DROP command required, or is it automatic on return.Answer:
In general, variables do not need to be dropped.However if you open files, they should be closed. If you open OLE handles, they should be closed. If you allocate binary buffers, they should be freed.
In general there are not problems and it does not run out of memoery.
Of couse if the UDF calls itself, and becomes a recursice UDF, there is a limit as to how deep it can go.
Basically you can possibly get into memory trouble with a UDF, but the problem will not be the UDF itself, but rather some peculiar thing that you are doing within the UDF.
Article ID: W15742
File Created: 2003:05:13:11:29:54
Last Updated: 2003:05:13:11:29:54