how to create conditions in a dll that can be changed through the application running it
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My question is simple, I have a dll that I wrote in c++ and I'm calling it from a c# program. My question is if I can have a variable in the c# program that can be used in the dll that is written in C++ and change conditions inside the program when changing the variable. ex:
C#:
int z = 0; //variable which i want to know if it can be used inside the dll.
[DllImport("C:\Users\examplelibtest.dll")] //path to the dll
public static extern void libtest(int x); //
C++:
#include "C:\Users\app.cpp" //path to the actual program
#include "C:\Users\Header.h" //^^
extern "C" __declspec(dllexport) void libtest(int x) {
myClass libtestx(x);
}
C++ (Header.h):
#pragma once
class myClass
{
public:
myClass(int x);
private:
//bool z;
};
C++ (app.cpp):
void dosomething():
//some method to do something
while(z == 0){ //heres my question, can a var (z) inside the c# program set the conditions?
//do something
}
myClass::myClass(int x) {
if (x == 1) {
dosomething();
}
else if (x == 0) {
//do nothing
}
}
note that I just started learning these two languages and everything I have been learning and writing I learned by just asking questions and reading online so sorry If I sound stupid or my code is trash. I'll be very thankful for any help regarding my question or any tips that could help me improve. Thanks again.
c# c++ dll
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
add a comment |
My question is simple, I have a dll that I wrote in c++ and I'm calling it from a c# program. My question is if I can have a variable in the c# program that can be used in the dll that is written in C++ and change conditions inside the program when changing the variable. ex:
C#:
int z = 0; //variable which i want to know if it can be used inside the dll.
[DllImport("C:\Users\examplelibtest.dll")] //path to the dll
public static extern void libtest(int x); //
C++:
#include "C:\Users\app.cpp" //path to the actual program
#include "C:\Users\Header.h" //^^
extern "C" __declspec(dllexport) void libtest(int x) {
myClass libtestx(x);
}
C++ (Header.h):
#pragma once
class myClass
{
public:
myClass(int x);
private:
//bool z;
};
C++ (app.cpp):
void dosomething():
//some method to do something
while(z == 0){ //heres my question, can a var (z) inside the c# program set the conditions?
//do something
}
myClass::myClass(int x) {
if (x == 1) {
dosomething();
}
else if (x == 0) {
//do nothing
}
}
note that I just started learning these two languages and everything I have been learning and writing I learned by just asking questions and reading online so sorry If I sound stupid or my code is trash. I'll be very thankful for any help regarding my question or any tips that could help me improve. Thanks again.
c# c++ dll
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
Despite the frankly laughable premise behind this question, I don't think it deserves to be downvoted/closed. Its both well written and answerable.
– BradleyDotNET
Nov 16 '18 at 20:53
add a comment |
My question is simple, I have a dll that I wrote in c++ and I'm calling it from a c# program. My question is if I can have a variable in the c# program that can be used in the dll that is written in C++ and change conditions inside the program when changing the variable. ex:
C#:
int z = 0; //variable which i want to know if it can be used inside the dll.
[DllImport("C:\Users\examplelibtest.dll")] //path to the dll
public static extern void libtest(int x); //
C++:
#include "C:\Users\app.cpp" //path to the actual program
#include "C:\Users\Header.h" //^^
extern "C" __declspec(dllexport) void libtest(int x) {
myClass libtestx(x);
}
C++ (Header.h):
#pragma once
class myClass
{
public:
myClass(int x);
private:
//bool z;
};
C++ (app.cpp):
void dosomething():
//some method to do something
while(z == 0){ //heres my question, can a var (z) inside the c# program set the conditions?
//do something
}
myClass::myClass(int x) {
if (x == 1) {
dosomething();
}
else if (x == 0) {
//do nothing
}
}
note that I just started learning these two languages and everything I have been learning and writing I learned by just asking questions and reading online so sorry If I sound stupid or my code is trash. I'll be very thankful for any help regarding my question or any tips that could help me improve. Thanks again.
c# c++ dll
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
My question is simple, I have a dll that I wrote in c++ and I'm calling it from a c# program. My question is if I can have a variable in the c# program that can be used in the dll that is written in C++ and change conditions inside the program when changing the variable. ex:
C#:
int z = 0; //variable which i want to know if it can be used inside the dll.
[DllImport("C:\Users\examplelibtest.dll")] //path to the dll
public static extern void libtest(int x); //
C++:
#include "C:\Users\app.cpp" //path to the actual program
#include "C:\Users\Header.h" //^^
extern "C" __declspec(dllexport) void libtest(int x) {
myClass libtestx(x);
}
C++ (Header.h):
#pragma once
class myClass
{
public:
myClass(int x);
private:
//bool z;
};
C++ (app.cpp):
void dosomething():
//some method to do something
while(z == 0){ //heres my question, can a var (z) inside the c# program set the conditions?
//do something
}
myClass::myClass(int x) {
if (x == 1) {
dosomething();
}
else if (x == 0) {
//do nothing
}
}
note that I just started learning these two languages and everything I have been learning and writing I learned by just asking questions and reading online so sorry If I sound stupid or my code is trash. I'll be very thankful for any help regarding my question or any tips that could help me improve. Thanks again.
c# c++ dll
c# c++ dll
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
edited Nov 16 '18 at 20:54
πάντα ῥεῖ
74.1k1077144
74.1k1077144
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
asked Nov 16 '18 at 20:44
Sam RafieiSam Rafiei
287
287
Despite the frankly laughable premise behind this question, I don't think it deserves to be downvoted/closed. Its both well written and answerable.
– BradleyDotNET
Nov 16 '18 at 20:53
add a comment |
Despite the frankly laughable premise behind this question, I don't think it deserves to be downvoted/closed. Its both well written and answerable.
– BradleyDotNET
Nov 16 '18 at 20:53
Despite the frankly laughable premise behind this question, I don't think it deserves to be downvoted/closed. Its both well written and answerable.
– BradleyDotNET
Nov 16 '18 at 20:53
Despite the frankly laughable premise behind this question, I don't think it deserves to be downvoted/closed. Its both well written and answerable.
– BradleyDotNET
Nov 16 '18 at 20:53
add a comment |
1 Answer
1
active
oldest
votes
No (to your approach)
Lets ignore the difference in languages for the moment; the whole point of libraries is to be reusable across different consumers (programs). Thus the library knowing some detail of the application using it (like a variable) totally defeats the purpose.
Moreover, it creates a circular dependency, no compiler is going to go for that.
Yes (applications can mutate library object state)
Programs do this all the time but they do it by creating the appropriate objects from the library and invoking methods on them (or mutating state, etc.). Say myClass had a method setZ that set its local z variable and that was called from the running application (it could even use the value of its (the programs) z variable!) Then subsequent calls to myClass would use that updated value.
On the whole, it seems like a revisit to OOP fundamentals and what libraries are for may be in order.
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
add a comment |
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1 Answer
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votes
No (to your approach)
Lets ignore the difference in languages for the moment; the whole point of libraries is to be reusable across different consumers (programs). Thus the library knowing some detail of the application using it (like a variable) totally defeats the purpose.
Moreover, it creates a circular dependency, no compiler is going to go for that.
Yes (applications can mutate library object state)
Programs do this all the time but they do it by creating the appropriate objects from the library and invoking methods on them (or mutating state, etc.). Say myClass had a method setZ that set its local z variable and that was called from the running application (it could even use the value of its (the programs) z variable!) Then subsequent calls to myClass would use that updated value.
On the whole, it seems like a revisit to OOP fundamentals and what libraries are for may be in order.
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
add a comment |
No (to your approach)
Lets ignore the difference in languages for the moment; the whole point of libraries is to be reusable across different consumers (programs). Thus the library knowing some detail of the application using it (like a variable) totally defeats the purpose.
Moreover, it creates a circular dependency, no compiler is going to go for that.
Yes (applications can mutate library object state)
Programs do this all the time but they do it by creating the appropriate objects from the library and invoking methods on them (or mutating state, etc.). Say myClass had a method setZ that set its local z variable and that was called from the running application (it could even use the value of its (the programs) z variable!) Then subsequent calls to myClass would use that updated value.
On the whole, it seems like a revisit to OOP fundamentals and what libraries are for may be in order.
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
add a comment |
No (to your approach)
Lets ignore the difference in languages for the moment; the whole point of libraries is to be reusable across different consumers (programs). Thus the library knowing some detail of the application using it (like a variable) totally defeats the purpose.
Moreover, it creates a circular dependency, no compiler is going to go for that.
Yes (applications can mutate library object state)
Programs do this all the time but they do it by creating the appropriate objects from the library and invoking methods on them (or mutating state, etc.). Say myClass had a method setZ that set its local z variable and that was called from the running application (it could even use the value of its (the programs) z variable!) Then subsequent calls to myClass would use that updated value.
On the whole, it seems like a revisit to OOP fundamentals and what libraries are for may be in order.
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
No (to your approach)
Lets ignore the difference in languages for the moment; the whole point of libraries is to be reusable across different consumers (programs). Thus the library knowing some detail of the application using it (like a variable) totally defeats the purpose.
Moreover, it creates a circular dependency, no compiler is going to go for that.
Yes (applications can mutate library object state)
Programs do this all the time but they do it by creating the appropriate objects from the library and invoking methods on them (or mutating state, etc.). Say myClass had a method setZ that set its local z variable and that was called from the running application (it could even use the value of its (the programs) z variable!) Then subsequent calls to myClass would use that updated value.
On the whole, it seems like a revisit to OOP fundamentals and what libraries are for may be in order.
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
answered Nov 16 '18 at 20:59
BradleyDotNETBradleyDotNET
52.4k87295
52.4k87295
add a comment |
add a comment |
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Despite the frankly laughable premise behind this question, I don't think it deserves to be downvoted/closed. Its both well written and answerable.
– BradleyDotNET
Nov 16 '18 at 20:53