July 25, 2008 02:26pm pdt

1. jkr 16,400
2. ravenpl 8,350
3. Infinity08 3,675
4. fridom 3,000
4. mannujam 3,000
6. MicheleM... 2,400
7. ozo 2,300
7. xentelwor... 2,300
9. evilrix 2,085
10. briancassin 2,000
10. Smart_Man 2,000
10. PCBONEZ 2,000
10. webshock 2,000
10. omarfarid 2,000
10. jahboite 2,000
10. yuzh 2,000
10. jaime_oliv... 2,000
10. JohnGaby 2,000
10. murphey2 2,000
10. Paul1n 2,000
10. duncan_roe 2,000
10. mish33 2,000
10. veedar 2,000
10. sanjooz 2,000
10. ebertk 2,000
10. davidgeldr... 2,000

1. jlevie 48,368
2. wesly_c... 37,200
3. Gns 28,641
4. jkr 27,650
5. ravenpl 22,894
6. duncan_roe 19,967
7. pjedmond 18,145
8. leew 15,200
9. rindi 14,630
10. cookre 13,865
11. sunnycoder 12,277
12. khkremer 9,600
13. ahoffmann 9,391
14. KeremE 8,600
15. ozo 7,900

01.24.2007 at 07:36AM PST, ID: 22134852

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

5.8

Problem When Reading Large Files With MapViewOfFile

Zones: Kernel And Operating System Specific Programming, C++ Programming Language, C# Programming Language

Tags: mapviewoffile, large

Hello,
I have problems when trying to read files with MapViewOfFile API function. Actually I only have problems when I try to read very large file. Here is what I am doing;

long offsetHight = 0;
long offsetLow = 0;
long positionAdjustment = 0;
int startpointer;
NativeMethods.SYSTEM_INFO syInfo = new NativeMethods.SYSTEM_INFO();
NativeMethods.GetSystemInfo(ref syInfo);
offSettemp = (100000);
positionAdjustment = (offSettemp % syInfo.dwAllocationGranularity);
if (positionAdjustment != 0)
offSettemp = offSettemp - positionAdjustment;
offsetHight = ((offSettemp >> 32) & 0xFFFFFFFF);
offsetLow = (offSettemp & 0xFFFFFFFF);

IntPtr mapFile = NativeMethods.CreateFileMapping(objectHandle.DangerousGetHandle(), IntPtr.Zero, NativeMethods.PageProtection.ReadWrite, 0, 0, string.Empty);
IntPtr viewFile = NativeMethods.MapViewOfFile(mapFile, 0x004, (int)offsetHight, (int)offsetLow, 8192);

Above code returns the value for "viewFile" handle only when I map up to 1.9 GB but when I try to set the offset at (i.e 10 milion) the file handle always return zero and GetLastError is 8 ERROR_NOT_ENOUGH_MEMORY

Please advice....

Please advice.....

Start your free trial to view this solution

Question Stats

Zone: Programming

Question Asked By: ismarosmanovic

Solution Provided By: itsmeandnobodyelse

Participating Experts: 4

Solution Grade: B

Translate:

Loading Advertisement...

20080236-EE-VQP-29