Compile Error C2059

[sweep123]

I need to modify a library that is used by a C-Scripting application to allow a MFC application to stop and start the processing.

However I get the compiler error C2059 at the code snip below:-

#define DLLDIR __declspec(dllexport) // export DLL information

// The extern "C" declaration allows mixed languages compactability, it prevents
// the C++ compiler from using decorated (modified) names for the functions
extern "C" { <-------- Error here !!!!!!!!!!!
void DLLDIR SetAbortFlag(int);
int DLLDIR GetAbortFlag(void);
};
static int abortFlag; /* The flag to abort the test */
static int contiuneFlag; /* The flag to schedule the test to continue */
static int enterFlag; /* The flag to schedule data entry the test */


int APPGetAbortFlag()
{
return abortFlag;
}

void APPSetAbortFlag(int a)
{
if(a == 1)
abortFlag = 1;
else
abortFlag = 0;
}

 

[sweep123]

I got it built but hit another problem!

The abortFlag is always 0 (false); see code snips below:-


First the Modifed section of th DLL project:-

#define DLLDIR __declspec(dllexport) // export DLL information

// The extern "C" declaration allows mixed languages compactability, it prevents
// the C++ compiler from using decorated (modified) names for the functions
extern "C" { <-------- Error here !!!!!!!!!!!
void DLLDIR APPSetAbortFlag(int);
int DLLDIR APPGetAbortFlag(void);
};
static int abortFlag; /* The flag to abort the test */
static int contiuneFlag; /* The flag to schedule the test to continue */
static int enterFlag; /* The flag to schedule data entry the test */


int APPGetAbortFlag()
{
return abortFlag;
}

void APPSetAbortFlag(int a)
{
if(a == 1)
abortFlag = 1;
else
abortFlag = 0;
}

Next the section of code for the application that uses the DLL:-

typedef void (*APPSETABORTFLAG)(int); // Pointer to APPSetAbortFlag(int)
typedef int (*APPGETABORTFLAG)(void); // Pointer to function int APPGetAbortFlag()

hMod = LoadLibrary("WHLLib.dll");

pGetAbortFlag = (APPGETABORTFLAG) GetProcAddress(hMod, "APPGetAbortFlag");

pSetAbortFlag = (APPSETABORTFLAG) GetProcAddress(hMod, "APPSetAbortFlag");

I set the flag like:-
UINT value = 1;
(pSetAbortFlag)(value);

and read the flag like:-

int result = (pGetAbortFlag) ();

Are they a problem with the use of the item of data in the DLL?

 

[Cagliostro]

how aboud #ifdef __cplusplus? If you don't put this flag then in C compilling you will get error.

Ion Filipski

 

[sweep123]

OK, thanks. I fiddled around with some of the complier options and got it complied.