stackavail

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Header File

malloc.h

Prototype

size_t stackavail(void);

Description

Gets the amount of available stack memory.

stackavail returns the number of bytes available on the stack. This is the amount of dynamic memory that alloca can access.

Return Value

stackavail returns a size_t value indicating the number of bytes available.

Portability

	POSIX	ANSI C	ANSI C++	Win32	Win64	OS X
stackavail				+

Example

#include <malloc.h>
#include <stdio.h>

int main(void) {
    char *buf;

    printf("\nThe stack: %u\tstack pointer: %u", stackavail(), _SP);
    buf = (char *) alloca(100 * sizeof(char));
    printf("\nNow, the stack: %u\tstack pointer: %u", stackavail(), _SP);
    return 0;
}