Using memcpy to copy managed structures

Posted by Haris Hasan on Stack Overflow See other posts from Stack Overflow or by Haris Hasan
Published on 2010-04-01T11:48:29Z Indexed on 2010/04/01 11:53 UTC
Read the original article Hit count: 498

Filed under:

memcpy

|

managed-c++

Hi,

I am working in mixed mode (managed C++ and C++ in one assembly). I am in a situation something like this.

ManagedStructure ^ managedStructure = gcnew ManagedStructure(); //here i set different properties of managedStructure

then I call "Method" given below and pass it "& managedStructure"

Method(void *ptrToStruct) { ManagedStructure ^ managedStructure2 = gcnew ManagedStructure(); memcpy(&managedStructure2 , ptrToStruct, sizeof(managedStructure2 )); }

I have following question about this scenario.

1) Is it safe to use memcpy like this? and if not what is its alternate to achieve same functionality? ( I can't change "Method" definition)

2) I am not freeing any memory as both the structures are managed. Is it fine?

© Stack Overflow or respective owner

Related posts about memcpy

memcpy segmentation fault on linux but not os x

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm working on implementing a log based file system for a file as a class project. I have a good amount of it working on my 64 bit OS X laptop, but when I try to run the code on the CS department's 32 bit linux machines, I get a seg fault. The API we're given allows writing DISK_SECTOR_SIZE (512)… >>> More
Using memcpy to copy managed structures

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am working in mixed mode (managed C++ and C++ in one assembly). I am in a situation something like this. ManagedStructure ^ managedStructure = gcnew ManagedStructure(); //here i set different properties of managedStructure then I call "Method" given below and pass it "& managedStructure" Method(void… >>> More
memcpy vs assignment in C

as seen on Stack Overflow - Search for 'Stack Overflow'
Under what circumstances should I expect memcpys to outperform assignments on modern INTEL/AMD hardware? I am using GCC 4.2.x on a 32 bit Intel platform (but am interested in 64 bit as well). >>> More
ReadProcessMemory to memcpy conversion. Need help

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm using: ReadProcessMemory(hProcess,(PVOID)(dwEngine_DLL+0x2E15C8+i),&memSnap[i],1,NULL); //Store the memory into a byte array To store a section of memory into an array of byte, but I realized this was sloppy since I'm in the same address space, but I'm not sure how to do the same thing… >>> More
memcpy(), what should the value of the size parameter be?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I want to copy an int array to another int array. They use the same define for length so they'll always be of the same length. What are the pros/cons of the following two alternatives of the size parameter to memcpy()? memcpy(dst, src, ARRAY_LENGTH*sizeof(int)); or memcpy(dst, src, sizeof(dst); Will… >>> More

Related posts about managed-c++

Cloning a WebCenter Portal Managed Server

as seen on Oracle Blogs - Search for 'Oracle Blogs'
I had to run some tests on a WebCenter Portal application deployed in a cluster. I've got a development VM with WebCenter PS4 (this also works on PS5) and I was trying to figure out how could I easily add a new managed server to my single-node domain, and make it a cluster. Creating the machine and… >>> More
Calling a native callback from managed .NET code (when loading the managed code using COM)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am really confused by the multitude of misinformation about native / managed interop. I have a C++ exe which is NOT built using CLR stuff (it is not Managed C++ or C++/CLI and never will be). I would like to access some code I have in a C# assembly. I can access the C# assembly using COM.… >>> More
managed beans as managed properties

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using JSF 1.1 on WebSphere 6.1. I am building search functionality within an application and am having some issues. I've stripped out the extras, and have left myself with the following: 4 managed beans: SearchController - Controller bean, session scope SearchResults - session scope (store… >>> More
How to create managed properties at site collection level in SharePoint2013

as seen on YBBest - Search for 'YBBest'
In SharePoint2013, you can create managed properties at site collection. Today, I’d like to show you how to do so through PowerShell. 1. Define your managed properties and crawled properties and managed property Type in an external csv file. PowerShell script will read this file and create the… >>> More
JSF Page does not submit when onclick javascript is added to menu item?

as seen on Stack Overflow - Search for 'Stack Overflow'
I show some detail using popup windows. I want to close those when the user clicks on sign-out link. I have a JavaScript function that'll close the windows. The sign-out link is rendered using Navigation MenuModel. The definition in faces-config is as below - <managed-bean> <managed-bean-name>signoutNavigation</managed-bean-name> … >>> More