Allocating a continuous block of memory for a structure?

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Kourosh - 27 Oct 2007 06:19 GMT

I have a structure that has a byte array as a field:
struct foo
{
public int A;
public int B;
public byte[] C;
}

I want to create an instance of this structure, such that all fields
A, B, and C are in a continous block of memory. Right now if I assign
C a new byte array, it gets created in a different spot in memory than
fields A and B.
Is there any way i can do this?

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Willy Denoyette [MVP] - 27 Oct 2007 09:06 GMT

>I have a structure that has a byte array as a field:
> struct foo
[quoted text clipped - 9 lines]
> fields A and B.
> Is there any way i can do this?

Not sure why you need this for, anyway, the only possible way is to declare
the array of fixed size in an unsafe block.

unsafe struct foo
{
public int A;
public int B;
fixed public byte[128] C; // embedded array of 128 bytes
}

Note both requirement; fixed size and unsafe.

Willy.

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Jon Skeet [C# MVP] - 27 Oct 2007 09:22 GMT

<snip>

> Not sure why you need this for, anyway, the only possible way is to declare
> the array of fixed size in an unsafe block.
[quoted text clipped - 7 lines]
>
> Note both requirement; fixed size and unsafe.

Also note that this is only available as of C# 2.

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Allocating a continuous block of memory for a structure?

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