/*!
* Wait for thread termination
* \param thread Thread descriptor (user level descriptor)
* \param retval Where to store exit status of joined thread
* \return 0 if thread already gone; -1 if not finished and 'wait' not set;
* 'thread exit status' otherwise
*/
int sys__pthread_join ( void *p )
{
pthread_t *thread;
void **retval;
kthread_t *kthread;
int ret_value = 0;
thread = *( (pthread_t **) p ); p += sizeof (pthread_t *);
retval = *( (void ***) p );
ASSERT_ERRNO_AND_EXIT ( thread, ESRCH );
kthread = thread->ptr;
if ( kthread_get_id (kthread) != thread->id )
{
/* at 'kthread' is now something else */
ret_value = EXIT_FAILURE;
SET_ERRNO ( ESRCH );
}
else if ( kthread_is_alive (kthread) )
{
ret_value = EXIT_SUCCESS;
SET_ERRNO ( EXIT_SUCCESS );
kthread_set_private_param ( kthread_get_active(), retval );
kthread_wait_thread ( NULL, kthread );
kthreads_schedule ();
}
else {
/* target thread is passive, collect status and free descr. */
ret_value = EXIT_SUCCESS;
SET_ERRNO ( EXIT_SUCCESS );
kthread_collect_status ( kthread, retval );
}
return ret_value;
}
/*!
* Wait for thread termination
* \param thread Thread descriptor (user level descriptor)
* \param retval Where to store exit status of joined thread
* \return 0 if thread already gone; -1 if not finished and 'wait' not set;
* 'thread exit status' otherwise
*/
int sys__pthread_join ( pthread_t *thread, void **retval )
{
kthread_t *kthread;
SYS_ENTRY();
ASSERT_ERRNO_AND_EXIT ( thread, ESRCH );
kthread = thread->ptr;
if ( kthread_get_id (kthread) != thread->id )
{
/* at 'kthread' is now something else */
SYS_EXIT ( ESRCH, EXIT_FAILURE );
}
else if ( kthread_is_alive (kthread) )
{
kthread_set_errno ( NULL, EXIT_SUCCESS );
kthread_set_syscall_retval ( NULL, EXIT_SUCCESS );
kthread_set_private_param ( kthread_get_active(), retval );
kthread_wait_thread ( NULL, kthread );
kthreads_schedule ();
SYS_EXIT ( kthread_get_errno(NULL),
kthread_get_syscall_retval(NULL) );
}
else {
/* target thread is passive, collect status and free descr. */
kthread_collect_status ( kthread, retval );
SYS_EXIT ( EXIT_SUCCESS, EXIT_SUCCESS );
}
}
