void* DLLCALL msgQueuePeek(msg_queue_t* q, long timeout)
{
link_list_t* list = msgQueueReadList(q);
if(list_wait(list,timeout))
#if defined(LINK_LIST_THREADSAFE)
listSemPost(list) /* Replace the semaphore we just cleared */
#endif
;
return listNodeData(listFirstNode(list));
}
BOOL DLLCALL msgQueueWait(msg_queue_t* q, long timeout)
{
BOOL result;
link_list_t* list = msgQueueReadList(q);
if((result=list_wait(list,timeout))==TRUE)
#if defined(LINK_LIST_THREADSAFE)
listSemPost(list) /* Replace the semaphore we just cleared */
#endif
;
return(result);
}
static list_node_t* DLLCALL list_add_node(link_list_t* list, list_node_t* node, list_node_t* after)
{
if(list==NULL)
return(NULL);
listLock(list);
node->list = list;
if(after==LAST_NODE) /* e.g. listPushNode() */
after=list->last;
node->prev = after;
if(after==list->last) /* append to list */
list->last = node;
if(after==FIRST_NODE) { /* insert at beginning of list */
node->next = list->first;
if(node->next!=NULL)
node->next->prev = node;
list->first = node;
} else {
if(after->next!=NULL) {
after->next->prev = node;
node->next = after->next;
}
after->next = node;
}
list->count++;
listUnlock(list);
#if defined(LINK_LIST_THREADSAFE)
if(list->flags&LINK_LIST_SEMAPHORE)
listSemPost(list);
#endif
return(node);
}