Re: out of scope pointers in threads

I am trying to send a pointer to the thread below; however, when the
thread gets executed, the pointer goes out of scope . How do I fix
it ?

int mywrite(char* id, int number_of_characters, char char_array)
{
  HANDLE Producer;

  DWORD ThId;

  //global_char = char_array;

  //create mutual exlusion for producer process to write into the
buffer

  //create producer thread and start the function for inserting
characters
  //mywriteTh is the entry point of the producer

  ptr =new data;
  ptr->character = char_array;
  cout<<ptr->character<<endl;
  ptr->id = id;
  cout<<ptr->id<<endl;

  Producer = (HANDLE) CreateThread (NULL, 0, mywriteTh,
reinterpret_cast<data> (ptr) , 0, &ThId); // i want to send the
pointer to this thread

  cout<<ptr->id<<endl;

  return 0;

}

DWORD WINAPI mywriteTh(data ptr)
{
 //global_char is available here

 DWORD tId = GetCurrentThreadId();

 data *ptr_data = reinterpret_cast<data *>(ptr); // pointer is goes
out of scope

}