Memory support

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Memory support

The following routines are for dynamic memory allocation.

The functions,

malloc()

calloc()

, and

realloc()

all call

sbrk()

at their lowest levels.

sbrk()

returns a pointer to the last memory address your application used before more memory was allocated.

Defined elsewhere as

char *

A compile-time option that moves a pointer to heap memory and checks for the upper limit.