Struct size containing vector<T> different sizes between DLL and EXE..

Posted by Michael Peddicord on Stack Overflow See other posts from Stack Overflow or by Michael Peddicord
Published on 2010-05-19T03:09:44Z Indexed on 2010/05/19 3:30 UTC
Read the original article Hit count: 243

Filed under:

dll

|

stdvector

|

sizeof

I have this situation where an EXE program imports a DLL for a single function call. It works by passing in a custom structure and returning a different custom structure. Up till now it's worked fine until I wanted one of the structs data members to be a vector < MyStruct >

When I do a sizeof(vector< MyStruct >) in my program I get a size of 20 but when I do it from inside the DLL I get a size of 24. This size inconsistency is causing a ESP pointer error.

Can anyone tell me why a Vector < MyStruct > would be a different size in the DLL than in the program?

I have reverified that my structs in both the DLL and the Program are identical.

I would appreciate any help on the subject. Thank you.

© Stack Overflow or respective owner

Related posts about dll

Mixing Silverlight-Specific System.Xml.Linq dll with Non-Silverlight System.Xml.Linq dll

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a Logic layer that references Silverlight's System.Xml.Linq dll and a GUI that is in WPF (hence using the non-Silverlight System.Xml.Linq dll). When I attempt to pass an XElement from GUI project to a method in the Logic project, I am getting (basically) "XElement is not of type XElement" errors… >>> More
SetupAPI.DLL to HID.DLL

as seen on Stack Overflow - Search for 'Stack Overflow'
With the SetupAPI.DLL I execute Function SetupDiGetClassDevs and get a pointer or handle Then Begin a loop Then I run Return = Function SetupDiEnumDeviceInterfaces with SP_DEVICE_INTERFACE_DATA.cbSize = 0 to get my size of what SP_DEVICE_INTERFACE_DATA needs to be Then I set size and execute again… >>> More
ASP.Net error: “The type ‘foo’ exists in both ”temp1.dll“ and ”temp2.dll" (pt 2)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm experiencing the same problem as in this question, but none of the answers fixed my problem. (edit: Setting the web.config batch attribute works, but that's a coverup, not a solution) The problem I'm having is with a User Control that I moved from the root directory to a subdirectory within the… >>> More
Application Specific Paths for DLL Loading when DLL is loaded dynamically

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi: I am building a program that uses a very simple plugin system. This is the code I'm using to load the possible plugins: public interface IPlugin { string Name { get; } string Description { get; } bool Execute(System.Windows.Forms.IWin32Window parent); } private void loadPlugins() … >>> More
StackOverflow Exception in Umanaged Dll When Called from Managed DLL

as seen on Stack Overflow - Search for 'Stack Overflow'
My question is similar to this one here, but there are some difference. I have a fortran dll as the backend, and a C# exe as the front end. I use PInvoke to pass data between them. There are 22 parameters between the C# and the fortran code. And some of them are integer, double, pointers ( C#… >>> More

Related posts about stdvector

A cross between std::multimap and std::vector?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm looking for a STL container that works like std::multimap, but has constant access time to random n-th element. I need this because I have such structure in memory that is std::multimap for many reasons, but items stored in it have to be presented to the user in a listbox. Since amount of data… >>> More
no match for operator= using a std::vector

as seen on Stack Overflow - Search for 'Stack Overflow'
I've got a class declared like this: class Level { private: std::vector<mapObject::MapObject> features; (...) }; and in one of its member functions I try to iterate through that vector like this: vector<mapObject::MapObject::iterator it; for(it=features.begin(); it<features… >>> More
Basic question about std::vector instantiation

as seen on Stack Overflow - Search for 'Stack Overflow'
This looks simple but I am confused: The way I create a vector of hundred, say, ints is std::vector<int> *pVect = new std::vector<int>(100); However, looking at std::vector's documentation I see that its constructor is of the form explicit vector ( size_type n, const T& value=… >>> More
Weird behavior of std::vector

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a class like this: class OBJ{...}; class A { public: vector<OBJ> v; A(int SZ){v.clear(); v.reserve(SZ);} }; A *a = new A(123); OBJ something; a->v.push_back(something); This is a simplified version of my code. The problem is in debug mode it works perfect. But in release… >>> More
Putting a C++ Vector as a Member in a Class that Uses a Memory Pool

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey, I've been writing a multi-threaded DLL for database access using ADO/ODBC for use with a legacy application. I need to keep multiple database connections for each thread, so I've put the ADO objects for each connection in an object and thinking of keeping an array of them inside a custom threadInfo… >>> More