pthreads, printf and cout

[Alex Vinokur]

Hi,

Behavior of printf and cout in a program below is different : cout prints nothing.

What is wrong?

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Windows 2000 Professional
CYGWIN_NT-5.0 1.5.4(0.94/3/2)
gcc version 3.3.1 (cygming special)
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====== C++ code : foo.cpp : BEGIN ======

#include <stdio.h>
#include <iostream>
#include <pthread.h>
#include <unistd.h>
using namespace std;

extern "C" void* Run(void *)
{
  printf ("printf : Run Start\n");
  cout << "cout   : Run Start" << endl;

  sleep (3);

  printf ("printf : Run Finish\n");
  cout << "cout   : Run Finish" << endl;
}

int main ()
{
pthread_t t1;
  pthread_create(&t1, NULL, Run, NULL);

int errNum = pthread_join(t1, NULL);
  printf ("printf : errNum = %d\n", errNum);
  cout << "cout   : errNum = " << errNum << endl;
}

====== C++ code : foo.cpp : END ========


====== Compilation & Run : BEGIN ======

$ g++ foo.cpp

$ a

printf : Run Start
printf : Run Finish
printf : errNum = 0

// cout prints nothing

====== Compilation & Run : END ========



--
   =====================================
   Alex Vinokur
     mailto:alexvn at connect.to
     http://mathforum.org/library/view/10978.html
     news://news.gmane.org/gmane.comp.lang.c++.perfometer
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