#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>

#include <windows.h>
#include <psapi.h>

void Print(const char* format, ...)
{
    va_list ap;
    PROCESS_MEMORY_COUNTERS info;

    va_start(ap,format);
    vprintf(format,ap);
    va_end(ap);

    ZeroMemory(&info,sizeof(info));
    GetProcessMemoryInfo(
                 GetCurrentProcess()
                 ,&info
                 ,sizeof(info));

    printf("usage=%13u kb / virtual=%13u kb\n\n"
             ,(unsigned)(info.WorkingSetSize / 1024)
             ,(unsigned)(info.PagefileUsage / 1024) );
}

int main()
{
    const size_t buf_size1 = 50*1024*1024;
    const size_t buf_size2 = 150*1024*1024;
    char* p = 0;

    SYSTEM_INFO info;
    GetSystemInfo(&info);
    printf("PAGE SIZE = %u\n\n",(unsigned)info.dwPageSize);

    Print("test1 begin\n");

    p = (char*) malloc(buf_size1);
    Print("malloc %u\n",buf_size1);

    p = (char*) realloc(p, buf_size2);
    Print("realloc to %u\n",buf_size2);

    free(p);
    Print("free\n");

    Print("test2 begin\n");

    p = (char*) malloc(buf_size1);
    Print("malloc %u\n",buf_size1);

    p[0] = 0;
    Print("assign first %d\n",0);

    p[buf_size1-1] = 0;
    Print("assgin last %d\n",0);

    p = (char*) realloc(p, buf_size2);
    Print("realloc to %u\n",buf_size2);

    free(p);
    Print("free\n");

    Print("test3 begin:\n");

    p = (char*) calloc(buf_size1,1);
    Print("calloc %u %u\n",buf_size1,1);

    p = (char*) realloc(p,buf_size2);
    Print("realloc to %u\n",buf_size2);

    free(p);
    Print("free\n");

    return 0; 
}