memtest.c

BIOS emulator and interface to Realmode X86 Emulator Library Can emulate a PCI Graphic Controller V

/****************************************************************************
*
*					SciTech OS Portability Manager Library
*
*  ========================================================================
*
*    The contents of this file are subject to the SciTech MGL Public
*    License Version 1.0 (the "License"); you may not use this file
*    except in compliance with the License. You may obtain a copy of
*    the License at http://www.scitechsoft.com/mgl-license.txt
*
*    Software distributed under the License is distributed on an
*    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
*    implied. See the License for the specific language governing
*    rights and limitations under the License.
*
*    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
*
*    The Initial Developer of the Original Code is SciTech Software, Inc.
*    All Rights Reserved.
*
*  ========================================================================
*
*
* Language:		ANSI C
* Environment:	any
*
* Description:	Test program to determine just how much memory can be
*				allocated with the compiler in use. Compile and link
*				with the appropriate command line for your DOS extender.
*
*				Functions tested:	malloc()
*									PM_availableMemory()
*
*
****************************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "pmapi.h"

#ifdef	__16BIT__
#define	MAXALLOC	64
#else
#define	MAXALLOC	2000
#endif

int main(void)
{
	int		i;
	ulong	allocs;
	ulong	physical,total;
	char	*p,*pa[MAXALLOC];

    printf("Program running in ");
	switch (PM_getModeType()) {
		case PM_realMode:
			printf("real mode.\n\n");
			break;
		case PM_286:
			printf("16 bit protected mode.\n\n");
			break;
		case PM_386:
			printf("32 bit protected mode.\n\n");
			break;
		}

	printf("Memory available at start:\n");
	PM_availableMemory(&physical,&total);
	printf("   Physical memory:           %ld Kb\n", physical / 1024);
	printf("   Total (including virtual): %ld Kb\n", total / 1024);
	printf("\n");
	for (allocs = i = 0; i < MAXALLOC; i++) {
		if ((pa[i] = malloc(10*1024)) != 0) {	/* in 10k blocks 	*/
			p = pa[allocs];
			memset(p, 0, 10*1024); /* touch every byte 				*/
			*p = 'x';           /* do something, anything with		*/
			p[1023] = 'y';      /* the allocated memory      		*/
			allocs++;
			printf("Allocated %lu bytes\r", 10*(allocs << 10));
			}
		else break;
		if (PM_kbhit() && (PM_getch() == 0x1B))
			break;
		}

	printf("\n\nAllocated total of %lu bytes\n", 10 * (allocs << 10));

	printf("\nMemory available at end:\n");
	PM_availableMemory(&physical,&total);
	printf("   Physical memory:           %ld Kb\n", physical / 1024);
	printf("   Total (including virtual): %ld Kb\n", total / 1024);

	for (i = allocs-1; i >= 0; i--)
		free(pa[i]);

    printf("\nMemory available after freeing all blocks (note that under protected mode\n");
    printf("this will most likely not be correct after freeing blocks):\n\n");
	PM_availableMemory(&physical,&total);
	printf("   Physical memory:           %ld Kb\n", physical / 1024);
	printf("   Total (including virtual): %ld Kb\n", total / 1024);

	return 0;
}