150 lines
3.3 KiB
C++
150 lines
3.3 KiB
C++
//
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// Universal Resource Consumer: Just an innocent stress program
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// Copyright (c) Microsoft Corporation, 1997, 1998, 1999
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//
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//
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// module: disk.cxx
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// author: silviuc
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// created: Mon Apr 13 14:02:12 1998
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <windows.h>
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#include "error.hxx"
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#include "disk.hxx"
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#include "consume.hxx"
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//
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// Table of contents (local functions)
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//
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static DWORD ConvertToMbytes (PULARGE_INTEGER Size);
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//
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// Function:
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//
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// ConsumeAllDiskSpace
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//
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// Description:
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//
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// This function consumes all disk space on the current
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// partition (the one from which `consume' has been launched).
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//
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void ConsumeAllDiskSpace ()
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{
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ULARGE_INTEGER TotalDiskSize;
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ULARGE_INTEGER FreeDiskSize;
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ULARGE_INTEGER UserFreeSize;
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ULARGE_INTEGER RequestSize;
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HANDLE File;
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HANDLE Mapping;
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BOOL Result;
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ULONG uLastBitMask;
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//
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// Get disk space information
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//
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Result = GetDiskFreeSpaceEx (
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NULL, // current directory
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& UserFreeSize,
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& TotalDiskSize,
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& FreeDiskSize);
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if (Result == FALSE) {
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Error ("GetDiskFreeSpaceEx() failed: error %u",
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GetLastError());
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}
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Message ("Total disk space: %u Mb", ConvertToMbytes (& TotalDiskSize));
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Message ("Free disk space: %u Mb", ConvertToMbytes (& FreeDiskSize));
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Message ("Free per user space: %u Mb", ConvertToMbytes (& UserFreeSize));
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//
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// Compute the request size
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//
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RequestSize.QuadPart = UserFreeSize.QuadPart;
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Message ("Attempting to use: %u Mb", ConvertToMbytes (& RequestSize));
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//
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// Don't allow a size that assigned to a LARGE_INTEGER will result
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// in a negative number
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//
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uLastBitMask = 1 << ( sizeof( uLastBitMask ) * 8 - 1 );
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RequestSize.HighPart &= ~uLastBitMask;
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//
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// Create a file
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//
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File = CreateFile (
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TEXT ("consume.dsk"),
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GENERIC_READ | GENERIC_WRITE,
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0, // no sharing
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NULL, // default security
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CREATE_ALWAYS,
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FILE_FLAG_DELETE_ON_CLOSE,
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NULL); // default template file
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if (File == INVALID_HANDLE_VALUE)
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Error ("CreateFile (`consume.dsk') failed: error %u",
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GetLastError());
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//
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// Create a mapping file on top of the file.
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//
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for ( ; RequestSize.QuadPart > 0 ; ) {
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Mapping = CreateFileMapping (
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File,
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NULL, // default security
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PAGE_READWRITE, // protection
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RequestSize.HighPart,
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RequestSize.LowPart,
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NULL); // no name
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if (Mapping != NULL)
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break;
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if ( RequestSize.QuadPart > 0x10000 ) {
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RequestSize.QuadPart -= 0x10000;
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}
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else {
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break;
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}
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Message ("Reattempting to use: %u Mb", ConvertToMbytes (& RequestSize));
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}
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}
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//
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// Function:
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//
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// ConvertToMbytes
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//
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// Description:
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//
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// Converts a size to Mbytes so that we can print more user-friendly
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// values.
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//
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static DWORD
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ConvertToMbytes (
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PULARGE_INTEGER Size)
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{
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return(DWORD)(Size->QuadPart >> 20);
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}
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//
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// end of module: disk.cxx
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//
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