Object Oriented programming using SystemC

[ashwathgan]

Hi

 

From what I have seen, SystemC throws error while attempting to use Inheritance/polymorphism.

 

For example

 

I have a Task 

 

SC_MODULE(Task)

{

sc_in<bool> in;

sc_in<bool> out;

 

void cliamResource()

{....}

 

void claimMemory()

{......}

 

 

SC_CTOR(Task)

{}

};

 

Like Wise i have a Resource Module :

 

And then I have number of C++ classes( class A, class B which defines each function I am using).

 

But I am not able to inherit these normal c++ classes like 

 

SC_MODULE(Task) : public A            \\ where A is a Class A

{};

 

 

Can anyone help me how t sort this out (or) Is it possible to inherit C++ classes ??

 

I have a error like : class or struct definition is missing

 

 

Thanks

[David Black]

Instead of using the SC_MODULE macro, try using a standard declaration:

 

struct Task : sc_core::sc_module, A {

 

...

 

};

[ashwathgan]

Thank a lot sir, 

 

It worked, but I have a small issue with the constructor

 

For example I have a Base class and I derive it in a SystemC Module as follows:

 

Class Base

{

int h;

 

void some_function()

{.....

}

 

and then I have my derived class of SystemC as follows:

 

class TaskA : public sc_module, public base 

{

 

sc-in<bool> a;

sc_out<bool> b;

 

Base b; // Instantiating a object from base Class

 

...

 

....

 

 

SC_CTOR(TaskA) : b ("base")

{

}

 

};

 

 

ERROR: No Default Constructor exists for "base" class. if its is normal c++, I can sort it out, but Im unable to figure out wat to do with this SC_CTOR macro.

 

 

 

 

Thanks 

 

[matteodc]

Hi,

 

This is the macro:

 

#define SC_CTOR(user_module_name)                                             \
    typedef user_module_name SC_CURRENT_USER_MODULE;                          \
    user_module_name( ::sc_core::sc_module_name )

 

you can use a standard constructor instead of the macro:

 

typedef TaskA SC_CURRENT_USER_MODULE;

TaskA(sc_core::sc_module_name name)
    : sc_module (name),
      b ("base")
{
}

 

For your error:

 

When you declare a non-default constructor for a class, the compiler does not generate a default one anymore. So you have to provide your own.

[ashwathgan]

Thanks its fixed now