/* Allocate a thread structure from the global free list. Global
mutex lock must be held by caller. The thread is moved to
the active list. */
struct thread_node *
__timer_thread_alloc (const pthread_attr_t *desired_attr, clockid_t clock_id)
{
struct list_links *node = list_first (&thread_free_list);
if (node != list_null (&thread_free_list))
{
struct thread_node *thread = thread_links2ptr (node);
list_unlink (node);
thread_init (thread, desired_attr, clock_id);
list_append (&thread_active_list, node);
return thread;
}
return 0;
}
/* Search the list of active threads and find one which has matching
attributes. Global mutex lock must be held by caller. */
struct thread_node *
__timer_thread_find_matching (const pthread_attr_t *desired_attr,
clockid_t desired_clock_id)
{
struct list_head *iter = list_first (&thread_active_list);
while (iter != list_null (&thread_active_list))
{
struct thread_node *candidate = thread_links2ptr (iter);
if (thread_attr_compare (desired_attr, &candidate->attr)
&& desired_clock_id == candidate->clock_id)
return candidate;
iter = list_next (iter);
}
return NULL;
}
