C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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_memmax
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─────Run-Time Library───────────────────────────────────────────────────────
 
     The _memmax function returns the size (in bytes) of the largest
     contiguous block of memory that can be allocated from the near
     heap (that is, the default data segment). Calling
     _nmalloc( _memmax ) will succeed as long as _memmax returns a
     nonzero value.
 
     Return Value
 
     The function returns the block size, if successful. Otherwise, it
     returns 0, indicating that nothing more can be allocated from the
     near heap.
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