Conference turris::c_plus_plus

    
    Hi,
    
    I'm placing the following note on behalf of Dave Collins.
    
    			Matt
    
    -------------------------
    
We have been having problems at a customer site using UNIX 4.0b and 
C++ 5.50.    The customer was attempting to port from a HP-RT platform 
to Digital UNIX and the base code include calls to:

  pthread_attr_create() and
  pthread_setprio()

These calls are documented in older Digital documentation that
referenced POSIX 1003.4a, but do not show up (no forward declarations)
in Digital 4.0 UNIX referencing POSIX 1003.1c.

 Q: Why does the older UNIX have a "higher" posix number?

The following trivial code example compiles if pthread.h is used
in place of pthread_exc.h.   Do we need to specify some POSIX defines
to make this work.   The include files that the customer is referencing
have a problem when trying to use pthread_exc.h

 #include <pthread_exc.h>
 #include <sys/types.h>
 #include <timers.h>

The reason the customer is attemptng to use pthread_exc.h is to 
use the two functions "pthread_attr_create & pthread_setprio"


#include <pthread.h>
// #include <pthread_exc.h>
#include <sys/types.h>
#include <timers.h>
#include <stdio.h>
#include <stdlib.h>

int ii;

void *start_routine (void * arg)
{
int *parg;

	parg = (int *) (arg);

	for (ii = 0; ii<*parg; ii++)

		{
		if (ii > 9999)
			break;
		}
	printf ("\n Thread ii = %d\n", ii);

	pthread_exit((void *) (&ii));

	return (void *) (NULL);
}

main()
{
pthread_t thread1;
int arg = 1256;
int ret = 55;
int *pi;

pi = &ret;
pthread_create (&thread1, NULL, &start_routine, (void *) (&arg));
pthread_join(thread1, (void **) &pi);
printf("\n Thread returned %d \n", *pi);
exit(1);

}

--------------------------------------------------

		Thanks,

		Dave Collins
		collinsda@mail.dec.com
		

Re .37:

DECthreads issues are addressed in the DECthreads conference: CLT::CMA (q.v.).
				/AHM