Memory allocation example

munch.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

// Wait [secs] seconds
void waitFor (unsigned int secs) {
    unsigned int retTime = time(0) + secs;   // Get finishing time.
    while (time(0) < retTime);               // Loop until it arrives.
}

in t main(int argc, char** argv) {
    // MB of memory to try to allocate (-1 = unlimited)
    int max = -1; 
  
    // Number of seconds to hold the memory before exiting and releasing memory
    int wait = 2;
  
    // Internal variables, no need to change
    int mb = 0;
    char* buffer;

    if(argc > 1)
        max = atoi(argv[1]);

    // Allocate memory until either max is reached or it can not be allocated
    while((buffer=malloc(1024*1024)) != NULL && mb != max) {
        memset(buffer, 0, 1024*1024);
        mb++;
        printf("Allocated %d MB\n", mb);
    }
  
    // Hold the memory for [wait] seconds before exiting the program and releasing memory
    printf("Allocation complete\nHolding %d mb of memory for %d seconds\n", mb, wait);
    waitFor(wait);

    return 0;
}