{

struct mallinfo mi;

mi = mallinfo();

printf("Total non-mmapped bytes (arena): %d\n", mi.arena);

printf("# of free chunks (ordblks): %d\n", mi.ordblks);

printf("# of free fastbin blocks (smblks): %d\n", mi.smblks);

printf("# of mapped regions (hblks): %d\n", mi.hblks);

printf("Bytes in mapped regions (hblkhd): %d\n", mi.hblkhd);

printf("Max. total allocated space (usmblks): %d\n", mi.usmblks);

printf("Free bytes held in fastbins (fsmblks): %d\n", mi.fsmblks);

printf("Total allocated space (uordblks): %d\n", mi.uordblks);

printf("Total free space (fordblks): %d\n", mi.fordblks);

printf("Topmost releasable block (keepcost): %d\n", mi.keepcost);

for (int i = 0; i < 10; ++i) {

boost::mutex::scoped_lock lock(io_mutex);

//boost::this_thread::sleep( boost::posix_time::milliseconds( 100 ) );

}

printf("\n============== sizeof(boost::thread) ============== %d\n", sizeof(boost::thread));

printf("\n============== sizeof(boost::detail::thread_data_base) ============== %d\n", sizeof(boost::detail::thread_data_base));

printf("\n============== sizeof(boost::detail::thread_data<>) ============== %d\n", sizeof(boost::detail::thread_data<void(*)()>));

printf("\n============== Before thread creation ==============\n");

display_mallinfo();

{

boost::thread thrd1(&count);

printf("\n============== After thread creation ==============\n");

display_mallinfo();

boost::thread thrd2(&count);

printf("\n============== After thread creation ==============\n");

display_mallinfo();

boost::thread thrd3(&count);

printf("\n============== After thread creation ==============\n");

display_mallinfo();

thrd1.join();

printf("\n============== After thread join ==============\n");

display_mallinfo();

thrd2.join();

printf("\n============== After thread join ==============\n");

display_mallinfo();

thrd3.join();

printf("\n============== After thread join ==============\n");

display_mallinfo();

}

printf("\n============== After thread destruction ==============\n");

display_mallinfo();

{

pthread_attr_t attr;

pthread_attr_init(&attr);

pthread_t thrd1;

pthread_create(&thrd1, &attr, &count2, 0);

printf("\n============== After thread creation ==============\n");

display_mallinfo();

pthread_t thrd2;

pthread_create(&thrd2, &attr, &count2, 0);

printf("\n============== After thread creation ==============\n");

display_mallinfo();

pthread_t thrd3;

pthread_create(&thrd3, &attr, &count2, 0);

printf("\n============== After thread creation ==============\n");

display_mallinfo();

pthread_attr_destroy(&attr);

printf("\n============== After thread attr destroy ==============\n");

display_mallinfo();

void* res;

pthread_join(thrd3, &res);

printf("\n============== After thread join ==============\n");

display_mallinfo();

pthread_join(thrd2, &res);

printf("\n============== After thread join ==============\n");

display_mallinfo();

pthread_join(thrd1, &res);

printf("\n============== After thread join ==============\n");

display_mallinfo();

//pthread_destroy(&thrd1);

//pthread_destroy(&thrd2);

//pthread_destroy(&thrd3);

}

printf("\n============== After thread destruction ==============\n");

display_mallinfo();

return 1;