Category : Files from Magazines
Archive   : VOL10N11.ZIP
Filename : WINMEM.C

 
Output of file : WINMEM.C contained in archive : VOL10N11.ZIP
/*
WINMEM.C -- How much memory can we allocate under Windows?

cl -c -AS -Gsw -Oais -Zpe winmem.c
link /align:16 winmem,,,/nod:slibcew libw,win.def
rc winmem.exe

; WIN.DEF -- generic Windows .DEF file
EXETYPE WINDOWS
STUB 'WINSTUB.EXE'
CODE PRELOAD MOVEABLE DISCARDABLE
DATA PRELOAD MOVEABLE MULTIPLE
HEAPSIZE 10240
STACKSIZE 5120

or (Borland C++ 2.0; no .DEF file required):
bcc -W winmem.c
rc winmem.exe

Copyright (c) 1991 Ziff Communications Co.
PC Magazine * Andrew Schulman
*/

#include
#include
#include
#include
#include
#include
#include "windows.h"

/* printf to a Windows MessageBox */
int msgprintf(char *fmt, ...)
{
static char s[1024];
int len;
va_list marker;
va_start(marker, fmt);
len = wvsprintf((char far *) s, (char far *) fmt, marker);
va_end(marker);
MessageBox(NULL, s, "PC Magazine Windows Memory Allocation Test", MB_OK);
return len;
}

/* return name of current Windows mode - far ptr for use with wvsprintf */
char far *win_mode(void)
{
unsigned long flags = GetWinFlags();
return (flags & WF_ENHANCED ? "Enhanced" :
flags & WF_STANDARD ? "Standard" :
/* default */ "Real") ;
}

int PASCAL WinMain(HANDLE hInstance, HANDLE hPrevInstance,
LPSTR lpszCmdLine, int nCmdShow)
{
unsigned long blksize = 32L << 10L; /* 32k per block */
unsigned long freespace, largest, allocated, save;
time_t t1, t2;
char far *fp;

/* retrieve these BEFORE we start allocating memory */
freespace = GetFreeSpace(0);
largest = GlobalCompact(-1);

/* allocate as much memory as possible */
time(&t1);
allocated = 0;
while (fp = GlobalLock(GlobalAlloc(GMEM_MOVEABLE, blksize)))
{
*fp = 'x';
fp[blksize-1] = 'y';
allocated += blksize;
save = fp;
Yield(); /* Let another program run */
}
time(&t2);

/* display results */
msgprintf("Running in %s mode\n"
"%lu bytes available\n"
"%lu bytes in largest block\n"
"Allocated %lu bytes in %lu seconds\n"
"Sample pointer: %04X:%04X",
win_mode(),
freespace, largest, allocated, t2 - t1,
FP_SEG(save), FP_OFF(save));

/* allocated memory will be freed automatically on exit */
return 0;
}



  3 Responses to “Category : Files from Magazines
Archive   : VOL10N11.ZIP
Filename : WINMEM.C
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/