Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
400 views
in Technique[技术] by (71.8m points)

c# - 64-Bit VB.NET Allocating > 2GB of RAM (.NET bug?)

I have a 64 bit VB.NET application and want to allocate a buffer > 2GB in size.

In the following code both the "new" and the "ReDim" throw an "OverflowException."

How can I allocate buffers > 2GB when these functions only accept signed 32 bit values?

(Is this possible in C#?)

Edit - I am running WinXP 64 with 4GB of RAM.

Dim width As Long = 19005
Dim height As Long = 32768

Dim buffer() As Byte = New Byte((width * height * 4) - 1) {}

Dim size As Long = (width * height * 4) - 1
ReDim buffer(size)
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Apparently it is not possible to allocate more than 2GB even under 64 bit .net application running on a 64 bit OS.

I find this to be very disappointing and completely without regard for what 64 bit applications and OSs are made for. I am dealing with gigantic images and would like to be able to work with the raw bytes all in RAM at once. Now I have to implement paging algorithms to limit the chunks to 2GB.

Hey Microsoft, hows abouts you fix this in the coming .NET release? Yes, I said fix. That's because it's broken. How do you expect 64 bit applications to take off when you do stupid things like this. (Can you tell that I am annoyed.) Thanks for listening.

Link

http://blogs.msdn.com/joshwil/archive/2005/08/10/450202.aspx


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...