/*!
* Create global message queue
*/
int sys__create_msg_queue ( void *p )
{
/* parameters on thread stack */
msg_q *msgq;
uint min_prio;
/* local variables */
kgmsg_q *gmsgq;
msgq = *( (msg_q **) p ); p += sizeof (msg_q *);
min_prio = *( (uint *) p );
ASSERT_ERRNO_AND_EXIT ( msgq, E_INVALID_HANDLE );
msgq = U2K_GET_ADR ( msgq, k_get_active_process () );
gmsgq = kmalloc ( sizeof ( kgmsg_q ) );
ASSERT_ERRNO_AND_EXIT ( gmsgq, E_NO_MEMORY );
list_init ( &gmsgq->mq.msgs ); /* list for messages */
k_threadq_init ( &gmsgq->mq.thrq ); /* list for blocked threads */
gmsgq->mq.min_prio = min_prio;
msgq->id = gmsgq->id = k_new_unique_id ();
msgq->handle = gmsgq;
list_append ( &kmsg_qs, gmsgq, &gmsgq->all ); /* all msg.q. list */
EXIT ( SUCCESS );
}
/*!
* Create new thread
* \param start_func Starting function for new thread
* \param param Parameter sent to starting function
* \param exit_func Thread will call this function when it leaves 'start_func'
* \param prio Thread priority
* \param stack Address of thread stack (if not NULL)
* \param stack_size Stack size
* \param run Move thread descriptor to ready threads?
* \param proc Process descriptor thread belongs to
* \return Pointer to descriptor of created kernel thread
*/
kthread_t *k_create_thread ( void *start_func, void *param, void *exit_func,
int prio, void *stack, size_t stack_size, int run,
kprocess_t *proc )
{
kthread_t *kthr;
/* if stack is not defined */
if ( proc && proc->stack_pool && ( !stack || !stack_size ) )
{
stack_size = proc->pi->thread_stack;
stack = ffs_alloc ( proc->stack_pool, stack_size );
}
else if ( !stack || !stack_size )
{
if ( !stack_size )
stack_size = DEFAULT_THREAD_STACK_SIZE;
stack = kmalloc ( stack_size );
}
ASSERT ( stack && stack_size );
kthr = kmalloc ( sizeof (kthread_t) ); /* thread descriptor */
ASSERT ( kthr );
/* initialize thread descriptor */
kthr->id = k_new_unique_id ();
kthr->state = THR_STATE_PASSIVE;
if ( prio < 0 ) prio = 0;
if ( prio >= PRIO_LEVELS ) prio = PRIO_LEVELS - 1;
kthr->sched.prio = prio;
arch_create_thread_context ( &kthr->context, start_func, param,
exit_func, stack, stack_size, proc );
kthr->queue = NULL;
kthr->exit_status = 0;
k_threadq_init ( &kthr->join_queue );
kthr->ref_cnt = 0;
if ( run ) {
move_to_ready ( kthr );
kthr->ref_cnt = 1;
}
kthr->stack = stack;
kthr->stack_size = stack_size;
kthr->proc = proc;
kthr->proc->thr_count++;
kthr->private_storage = NULL;
#ifdef MESSAGES
k_thr_msg_init ( &kthr->msg );
#endif
list_append ( &all_threads, kthr, &kthr->all );
return kthr;
}
/*!
* Create global message queue
*/
int sys__create_msg_queue ( msg_q *msgq, uint min_prio )
{
kgmsg_q *gmsgq;
ASSERT_ERRNO_AND_EXIT ( msgq, E_INVALID_HANDLE );
gmsgq = kmalloc ( sizeof ( kgmsg_q ) );
ASSERT_ERRNO_AND_EXIT ( gmsgq, E_NO_MEMORY );
list_init ( &gmsgq->mq.msgs ); /* list for messages */
k_threadq_init ( &gmsgq->mq.thrq ); /* list for blocked threads */
gmsgq->mq.min_prio = min_prio;
msgq->id = gmsgq->id = k_new_unique_id ();
msgq->handle = gmsgq;
list_append ( &kmsg_qs, gmsgq, &gmsgq->all ); /* all msg.q. list */
EXIT ( SUCCESS );
}