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Table of Contents
4. Standard Units
4.67. System - Built-in routines
4.67.2. System Unit Procedures and Functions
4.67.2.51. MemAvail function
4.67.2.51. MemAvail function
Targets: MS-DOS, OS/2, Win32
System Unit
Returns the amount of all free memory in the heap.
Declaration:
function MemAvail: dword;
Restrictions:
A common practice is to preserve the amount of memory available at the
beginning of a program, and then verifying the amount at the end is
the same (thus, ensuring there are no allocated pages still present).
When allocating a large amount of memory (> 1MB) in DOS, the GetMem() function will
allocate some memory internally. Therefore, the difference at the end of the program may
not accurately reflect GetMem()/FreeMem() pairings. Also, in Win32, the information
returned is volatile. There is no guarantee that two sequential calls to this function
will return the same information.
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