Questions tagged [declspec]
67 questions
3
votes
1 answer
__declspec(align) for multiple declarations
Sorry for the very simple question, couldn't find a googleable answer.
Is this declaration syntax:
__declspec(align(16)) float rF[4];
__declspec(align(16)) float gF[4];
__declspec(align(16)) float bF[4];
Equivalent to this:
__declspec(align(16))…
Rotem
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3
votes
0 answers
What is the need for dllimport?
I am playing with DLLs to get a better understanding of them. So I created a simple dll (with load-time dynamic linking) which has functions to Add, Sub and Mul. In the header file for the dll I used __declspec(dllexport) for the function…
Harsha
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2
votes
1 answer
Using __declspec(nothrow) on functions that return references
I'd like to apply __declspec(nothrow) on some of my member functions that return object references. For example, I'd like to add it to this function (in MyClass.h):
CMyClass& operator= ( IN UInt32 nValue )
{
return ( SetValue ( nValue )…
xxbbcc
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2
votes
2 answers
Do overloaded operators within classes require __declspec(dllexport) if they're used in a DLL project?
When using __declspec(dllexport), should overloaded operators also have this exportation flag assigned? For example, say you have something like:
/*
Overloaded operator (equivalent operator) returns true if x equals compared…
Darkenor
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2
votes
0 answers
__declspec(dllimport) c structure: access violation
For some time I have been trying to find a solution for the below problem, but with no success:
I have a "c" dll, where the following structure is defined:
file: myDll.h
#ifdef EXPORTS
#define EXPORT __declspec(dllexport)
#else
#define EXPORT…
test_c
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2
votes
1 answer
What does "storage-class information" mean in __declspec()?
I am reading the MSDN article about __declspec.
It starts with:
The extended attribute syntax for specifying storage-class information
uses the __declspec keyword, which specifies that an instance of a
given type is to be stored with a…
smwikipedia
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1
vote
1 answer
VC++ 2008/2010: is throw() or __declspec(nothrow) a better choice?
When using VC++ 2008 and 2010, which marker is better to use to indicate a function won't throw exceptions:
throw() (C++ standard)
__declspec(nothrow) (MS extension)
I read a few older forum discussions where people said that using throw() may…
xxbbcc
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1
vote
2 answers
LNK2001 unresolved external when importing functions from MFC DLL
I have created an MFC DLL and have exported the functions for example in the file SerialPort.h:
class CSerialPortApp : public CWinApp
{
public:
CSerialPortApp();
__declspec(dllexport) int SWrite(unsigned char* toSend, int len);
};
and in…
Lee Worbey
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1
vote
1 answer
Is there a way to avoid redefining boilerplate macros for shared library export attributes in every source file when using CMake?
So I've been working on porting a CMake C++ to building on Windows using Visual Studio.
I've learned that, unlike Linux/g++ which exports all symbols automatically, that MSVC does not export any symbols that it is not explicitly told to do so. …
Chris Gnam
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1
vote
1 answer
MSVC: __declspec(dllexport) does not symbols
I have a small issue when it comes to writing a DLL in MSVC (the 2010 version in particular).
My program consists of the main part and a DLL. The DLL contains a function that is
__declspec(dllexport) int test_function(void) {
return 42;
}
The…
asiouser
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1
vote
2 answers
How to hide some class public properties from watch list?
I am still using BDS2006 (Turbo explorer C++) and upgrading is still not an option. I have a problem that while debugging some of more advanced template/classes containing properties like:
__declspec( property (get=???, put=???) ) ??? ???;
are…
Spektre
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1
vote
1 answer
Call C++ function from inside dynamically loaded dll
I'm writing a C++ programm that dynamically loads a dll at runtime and calls a function within that dll.
Thats working fine but now i want to call a function defined in my C++ programm from within the dll.
My main.cpp looks like this:
#include…
Painkiller
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1
vote
1 answer
Using dllimport in place of dllexport
I seem to be able to use __declspec(dllexport) and __declspec(dllimport) interchangeably when building my dll in Visual Studio 2015. I would have thought when making the DLL that the dllexport command would have been required but it seems either…
eball
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1
vote
2 answers
Pros and Cons of Using .def Files
I don't understand this paragraph :
Exporting functions in a .def file gives you control over the export ordinals. When you add an exported function to your DLL, you can assign it a higher ordinal value than any other exported function. When you do…
user5708257
1
vote
0 answers
__declspec(dllimport) not behaving as expected
I am using this code here :
include "windows.h"
#include "stdio.h"
#include
#pragma comment(lib, "StubDLL.lib")
// StubDLL defines as __declspec(dllexport) Add and Function
#include "StubDLL.h"
// just to try it with MS…
n80fr1n60
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