Re: [Boost-users] How to pass data to thread

2 Oct 2006

      Monica Gretzer wrote:
...
Hi,
I want to pass data to a thread function. My question is- what is 
wrong with this code? The compiler error output is: "error: function 
returning a function". In the code below I am trying to pass an int to 
the thread function.
// ------------- code: how to pass data to the thread ? ----------------
#include 
#include 
#include <iostream>
using namespace std;
class TestThread
{
public:
  void thread(int a);
  void CreateThreads(void);
};
void TestThread::thread(int a)
{
  cout << "I am thread " << a << endl;
}
void TestThread::CreateThreads()
{
  boost::thread t1( boost::bind( &TestThread::thread, 10));
  boost::thread t2( boost::bind( &TestThread::thread, 20));
// wait for the thread to finish
  t1.join();
  t2.join();
}
int main()
{
  TestThread t;
  t.CreateThreads();
}
hi monica,
either make TestThread::thread static ...

class TestThread
{
...
  static void thread(int a);
...
};

or use an instance of TestThread to bind to...

void TestThread::CreateThreads()
{
    TestThread tt;
  boost::thread t1( boost::bind( &TestThread::thread, tt, 10));
...
}

--
HTH dave

Re: [Boost-users] How to pass data to thread

David Klein