Thread: Passing ofstream object to another function

Hi, need some help here.

i have an idea of -

Code:

int main()
{
  ofstream ofs;
}

void openFile(ofstream var_ofs)
{
  var_ofs.open(arg);
}

void writeFile(ofstream var_ofs)
{
  var_ofs.write(arg);
}

i am trying to make it into functions so that i can have multiple threads writing to the file using the same stream. i understand that declaring the ofstream variable as global will be one solution. however, due to requirements, that cannot be done.

how can this be done without using global variables? i have tried passing the ofstream as pointer but that wouldn't work too.

Make the parameters references to an ofstream.