static inline int dequeue(struct queue *queue, int *data)
{
CHECK_QUEUE_POINTER(queue);
if (1 == is_queue_empty(queue)) {
fprintf(stderr, "queue is empty\n");
return 1;
}
if (NULL != data)
*data = queue->data[queue->front];
queue->front = (queue->front +1) % MAX_QUEUE_SIZE;
queue->flag = 0;
return 0;
}
/**
*
* @param dque
* @param data_ptr
*
* @return TN_RETVAL
*/
TN_RETVAL tnnc_queue_isend_polling (TN_DQUE_S *dque, void *data_ptr)
{
TN_UWORD tn_save_status_reg TN_UNUSED;
TN_RETVAL rc;
CDLL_QUEUE_S *que;
TN_TCB_S *task;
/*
Not check parameter error
if (dque == TN_NULL)
return TERR_WRONG_PARAM;
*/
if (dque->id_dque != TN_ID_DATAQUEUE)
return TERR_NOEXS;
if (tn_is_non_sys_int_context())
{
return TERR_WCONTEXT;
}
tn_idisable_interrupt();
if (!is_queue_empty(&(dque->wait_receive_list)))
{
que = queue_remove_head(&(dque->wait_receive_list));
task = get_task_by_tsk_queue(que);
task->data_elem = data_ptr;
if (task_wait_complete(task, TN_FALSE))
{
tn_context_switch_request = TN_TRUE;
tn_ienable_interrupt();
return TERR_NO_ERR;
}
rc = TERR_NO_ERR;
}
else
{
rc = dque_fifo_write(dque,data_ptr);
if (rc != TERR_NO_ERR)
{
rc = TERR_TIMEOUT;
}
}
tn_ienable_interrupt();
return rc;
}
//----------------------------------------------------------------------------
// Release Semaphore Resource
//----------------------------------------------------------------------------
int tn_sem_signal(TN_SEM * sem)
{
TN_INTSAVE_DATA
int rc; //-- return code
CDLL_QUEUE * que;
TN_TCB * task;
#if TN_CHECK_PARAM
if(sem == NULL)
return TERR_WRONG_PARAM;
if(sem->max_count == 0)
return TERR_WRONG_PARAM;
if(sem->id_sem != TN_ID_SEMAPHORE)
return TERR_NOEXS;
#endif
TN_CHECK_NON_INT_CONTEXT
tn_disable_interrupt();
if(!(is_queue_empty(&(sem->wait_queue))))
{
//--- delete from the sem wait queue
que = queue_remove_head(&(sem->wait_queue));
task = get_task_by_tsk_queue(que);
if(task_wait_complete(task))
{
tn_enable_interrupt();
tn_switch_context();
return TERR_NO_ERR;
}
rc = TERR_NO_ERR;
}
else
{
if(sem->count < sem->max_count)
{
sem->count++;
rc = TERR_NO_ERR;
}
else
rc = TERR_OVERFLOW;
}
tn_enable_interrupt();
return rc;
}
//----------------------------------------------------------------------------
int tn_event_iwait(TN_EVENT * evf,
unsigned int wait_pattern,
int wait_mode,
unsigned int * p_flags_pattern)
{
TN_INTSAVE_DATA_INT
int rc;
int fCond;
#if TN_CHECK_PARAM
if(evf == NULL || wait_pattern == 0 || p_flags_pattern == NULL)
return TERR_WRONG_PARAM;
if(evf->id_event != TN_ID_EVENT)
return TERR_NOEXS;
#endif
TN_CHECK_INT_CONTEXT
tn_idisable_interrupt();
//-- If event attr is TN_EVENT_ATTR_SINGLE and another task already
//-- in event wait queue - return ERROR without checking release condition
if((evf->attr & TN_EVENT_ATTR_SINGLE) && !is_queue_empty(&(evf->wait_queue)))
{
rc = TERR_ILUSE;
}
else
{
//-- Check release condition
if(wait_mode & TN_EVENT_WCOND_OR) //-- any setted bit is enough for release condition
fCond = ((evf->pattern & wait_pattern) != 0);
else //-- TN_EVENT_WCOND_AND is default mode
fCond = ((evf->pattern & wait_pattern) == wait_pattern);
if(fCond)
{
*p_flags_pattern = evf->pattern;
if(evf->attr & TN_EVENT_ATTR_CLR)
evf->pattern = 0;
rc = TERR_NO_ERR;
}
else
rc = TERR_TIMEOUT;
}
tn_ienable_interrupt();
return rc;
}
void keyboard_read(u32* key)
{
u8 scan_code;
u32 col;
BOOL b_shift;
if (!is_queue_empty(&kb_queue))
{
io_cli();
de_queue(&kb_queue, &scan_code);
io_sti();
/* 首先处理E0 开头的情况，将b_leading_e0置位，然后直接返回 */
if (scan_code == 0xe0)
{
b_leading_e0 = TRUE;
return;
}
/* 是键被抬起，暂时将键值设为0 */
if (scan_code & 0x80)
{
if (*key == K_SHIFT_L)
b_shift_l = 0;
if (*key == K_SHIFT_R)
b_shift_r = 0;
*key = 0;
return;
}
b_shift = b_shift_l || b_shift_r;
col = b_shift ? 1 : 0;
if (b_leading_e0)
{
col = 2;
b_leading_e0 = FALSE;
}
*key = keymap[scan_code & 0x7f][col];
if (*key == K_SHIFT_L)
b_shift_l = 1;
if (*key == K_SHIFT_R)
b_shift_r = 1;
b_shift = b_shift_l || b_shift_r;
}
}
static void en_queue(Queue* q,Customer* c)
{
c->time_stamp = now_time;
if(is_queue_empty(q))
{
q->tail = q->head = c;
q->tail->next = NULL;
q->head->prev = NULL;
}else{
c->prev = q->tail;
q->tail->next = c;
q->tail = c;
q->tail->next = NULL;
}
}
void *consumer(void *arg)
{
pthread_mutex_lock(&mutex);
while(is_queue_empty(Q)){
pthread_cond_wait(&full, &mutex);
}
int data;
dequeue(&Q, &data);
Q.size --;
printf("Consumer a produce %d.\n", data);
pthread_cond_signal(&empty);
pthread_mutex_unlock(&mutex);
}
int enqueue(Queue* queue, Node* node) {
if (NULL == queue || NULL == node)
return RTX_ERR;
node->next = NULL;
if (is_queue_empty(queue)) {
queue->first = node;
queue->last = node;
} else {
queue->last->next = node;
queue->last = queue->last->next;
}
return RTX_OK;
}
simple_thread_task* simple_thread_pool::acquire_task()
{
insync(cs_);
t_task_list::iterator iter = task_list_.first();
if (iter.is_valid())
{
task_list_.remove(iter);
}
if (is_queue_empty())
ResetEvent(have_task_);
return iter.is_valid() ? *iter : NULL;
}
//----------------------------------------------------------------------------
int tn_queue_isend_polling(TN_DQUE * dque, void * data_ptr)
{
TN_INTSAVE_DATA_INT
int rc;
CDLL_QUEUE * que;
TN_TCB * task;
#if TN_CHECK_PARAM
if(dque == NULL)
return TERR_WRONG_PARAM;
if(dque->id_dque != TN_ID_DATAQUEUE)
return TERR_NOEXS;
#endif
TN_CHECK_INT_CONTEXT
tn_idisable_interrupt();
//-- there are task(s) in the data queue's wait_receive list
if(!is_queue_empty(&(dque->wait_receive_list)))
{
que = queue_remove_head(&(dque->wait_receive_list));
task = get_task_by_tsk_queue(que);
task->data_elem = data_ptr;
if(task_wait_complete(task))
{
tn_ienable_interrupt();
return TERR_NO_ERR;
}
rc = TERR_NO_ERR;
}
else //-- the data queue's wait_receive list is empty
{
rc = dque_fifo_write(dque,data_ptr);
if(rc != TERR_NO_ERR) //-- No free entries in data queue
rc = TERR_TIMEOUT; //-- Just convert errorcode
}
tn_ienable_interrupt();
return rc;
}
void ssd_perform_refresh(ssd_t *currdisk, double now)
{
int size = ll_get_size(currdisk->refresh_queue);
int i=0,blocks_to_refresh=0;
double next_refresh_time = currdisk->params.refresh_interval + currdisk->params.refresh_service_time * currdisk->params.nelements * currdisk->params.blocks_per_element/1000; //This value is an upper bound on the refresh time.
listnode **clean_blocks_issue_list = (listnode**)malloc(currdisk->params.nelements * sizeof(listnode*));
for(i=0;i<currdisk->params.nelements;i++)
ll_create(&clean_blocks_issue_list[i]);
i=0;
while(i<size) {
listnode* currnode = ll_get_nth_node(currdisk->refresh_queue,i);
block_metadata* currblock = (block_metadata*)currnode->data;
ssd_page_metadata* least_retention_page = currblock->least_retention_page;
//assert(now - least_retention_page->time_of_last_stress >0);
//least_retention_page->retention_period -= (now - least_retention_page->time_of_last_stress); //account for time spent idling.
if(ssd_block_dead(currblock,currdisk)) //Too late, block is dead. Handle it accordingly
continue;
//check if currblock needs refresh *now*
if(current_retention_period(currblock) < next_refresh_time || ssd_virtual_retention_expired(currblock,currdisk)) {
refresh_queue_free_node(currdisk->refresh_queue,currblock);
blocks_to_refresh++;size--;
ll_insert_at_tail(clean_blocks_issue_list[currblock->elem_num],currblock);
}
i++;
}
if(blocks_to_refresh!=0) {
fprintf(stderr, "# of blocks to refresh :%d\n",blocks_to_refresh);
}
for(i=0;i<currdisk->params.nelements;i++) {
if(is_queue_empty(clean_blocks_issue_list[i]))
continue;
fprintf(stderr, "About to refresh %d blocks in elem #%d\n",ll_get_size(clean_blocks_issue_list[i]),i);
ssd_invoke_element_refresh_fcfs(i,clean_blocks_issue_list[i],currdisk);
ll_release(clean_blocks_issue_list[i]);
}
}
static Customer* out_queue(Queue* q)
{
Customer *c = NULL;
if(!is_queue_empty(q))
{
c = q->head;
if(q->head==q->tail)
{
q->head=q->tail=NULL;
}else{
q->head = q->head->next;
q->head->prev = NULL;
}
c->next = NULL;
c->prev = NULL;
}
return c;
}
/* 元素入队 */
q_node_t push_queue(Queue *q,q_item n)
{
q_node_t qnode;
qnode = (q_node_t)malloc(sizeof(q_node_t));
if(qnode != NULL){
qnode->data = n;
qnode->next = NULL;
if(is_queue_empty(q) == 1){
q->front = qnode;
}
else{
q->rear->next = qnode;
}
q->rear = qnode;
q->size++;
}
return qnode;
}
/**
watcher : watch the work queues, to find out if there is work to do
@handle : the uv_prepare_t
**/
void cspider_watcher(uv_prepare_t *handle) {
cspider_t *cspider = (cspider_t*)handle->data;
if (get_status_num(cspider->page_queue, PAGE_DOWNLOAD_WAIT) != 0) {
/*
if there is task unhandled yet, start work thread
*/
/* get new thread worker */
uv_work_t *req = (uv_work_t*)malloc(sizeof(uv_work_t));
PANIC(req);
/* let thread worker point to the page which status is (url_add)*/
req->data = get_status_page(cspider->page_queue, PAGE_DOWNLOAD_WAIT);
/* new page point to new thread worker too. */
((cs_page*)req->data)->worker = req;
/* change status (url_add) -> (url_download)*/
set_status(cspider->page_queue, (cs_page*)req->data, PAGE_DOWNLOAD_RUNNING);
/* begin thread */
uv_queue_work(cspider->loop, req, cspider_download, cspider_download_done);
}
if (get_status_num(cspider->page_queue, PAGE_PROCESS_WAIT) != 0) {
/* if there is data required to be processed */
/* get new thread worker */
uv_work_t *req = (uv_work_t*)malloc(sizeof(uv_work_t));
PANIC(req);
/* let thread worker point to the page which status is (page_add) */
req->data = (cs_page*)get_status_page(cspider->page_queue, PAGE_PROCESS_WAIT);
/* new page point to new thread worker too. */
((cs_page*)req->data)->worker = req;
/* change status (page_add) -> (url_process)*/
set_status(cspider->page_queue, (cs_page*)req->data, PAGE_PROCESS_RUNNING);
/* begin thread */
uv_queue_work(cspider->loop, req, cspider_process, cspider_process_done);
}
if (is_queue_empty(cspider->page_queue) == 0) {
/* if page queue is empty,
then stop cspider*/
uv_prepare_stop(handle);
}
}
int remove(Queue* queue, Node* node) {
Node* cur = NULL;
Node* prev = NULL;
if (NULL == queue || is_queue_empty(queue) || NULL == node)
return RTX_ERR; // ERROR: queue is NULL, queue is empty, or node is NULL
if (node == queue->first) {
/*#ifdef DEBUG_0
printf("node == queue -> first.\n\r");
#endif*/
if (queue->first == queue->last) {
queue->first = NULL;
queue->last = NULL;
}
else {
queue->first = queue->first->next;
}
return RTX_OK;
}
cur = queue->first->next;
prev = queue->first;
while (cur != NULL && prev != NULL) {
if (node == cur) {
if (cur == queue->last) {
queue->last = prev;
}
/*#ifdef DEBUG_0
printf("node == cur\n\r");
#endif*/
prev->next = cur->next;
return RTX_OK;
}
prev = cur;
cur = cur->next;
}
return RTX_ERR; // ERROR: not found
}
// straight to the tail
void enqueue(task_t *t, runqueue_t *rq) {
// de-link task from all queues
dequeue_all(t);
// add it to tail of rq
if(is_queue_empty(rq)) {
INIT_LIST_HEAD(&t->run_list);
rq->head = t;
} else {
task_t *curTail = rq->tail;
list_t *l = &curTail->run_list; // run_list is struct in task_struct
l->next = &t->run_list;
(&t->run_list)->prev = l;
}
// tail it baby
rq->tail = t;
}
// A utility function to delete a frame from queue
void del_queue(Queue* queue)
{
if (is_queue_empty(queue))
return;
// if this is the only node in list, then change front
if (queue->front == queue->rear)
queue->front = NULL;
Node* temp = queue->rear;
queue->rear = queue->rear->prev;
if (queue->rear)
queue->rear->next = NULL;
free(temp);
queue->count--;
}
// event handler
static void event_handle(Event* e)
{
Component* component = component_list[e->component_id];
switch(e->event_type)
{
case ARRIVAL:
{
Customer *c;
double next_time = generate_customer(C2G(component),e->timestamp,&c);
Event* departure_event = event_router(c,C2G(component)->D);
if(departure_event)
{
schedule_event(departure_event);
}
Event *arrival_event = e;//reuse
e->timestamp = next_time;
schedule_event(arrival_event);
}break;
case DEPARTURE:
{
Queue* queue = C2Q(component);
Customer *c = out_queue(queue);
c->time_serve = e->serve_time;
double next_time = simulation_serve(c,queue);
Event* departure_event = event_router(c,queue->D);
if(departure_event)
{
schedule_event(departure_event);
}
if(!is_queue_empty(queue))
{
Event* next_departure_event = e;
next_departure_event->timestamp = next_time;
next_departure_event->serve_time = next_time - now_time;
schedule_event(next_departure_event);
}else
free(e);
}break;
default:
printf("event type error\n");
exit(-1);
}
}
static inline int print_queue(struct queue *queue)
{
CHECK_QUEUE_POINTER(queue);
int i, start;
if (1 == is_queue_empty(queue)) {
return 0;
} else {
if (1 == is_queue_full(queue)) {
fprintf(stdout, "queue[%d]:%d\n",
queue->front, queue->data[queue->front]);
start = (queue->front + 1) % MAX_QUEUE_SIZE;
} else {
start = queue->front;
}
for (i = start; i != queue->rear; i = (i + 1) % MAX_QUEUE_SIZE) {
fprintf(stdout, "queue[%d]:%d\n",
i, queue->data[i]);
}
}
}
// This method is non-blocking (i.e. it can NEVER cause preemption). It is used by the
// kernal processes since kernel processes should never block.
void* k_receive_message_nb(int* sender_id) {
MSG_BUF* env;
__disable_irq();
if (is_queue_empty(&(gp_current_process->msg_queue))) {
sender_id = NULL;
__enable_irq();
return NULL;
}
env = (MSG_BUF*)dequeue(&(gp_current_process->msg_queue));
if (sender_id != NULL) {
*sender_id = env->m_send_pid;
}
__enable_irq();
return (void*)env;
}
void bfs(int size, int matrix[size][size], int visited[size], int vertex) {
QUEUEPTR queue = create_queue();
queue = enqueue(queue, vertex);
visited[vertex] = 1;
int front, i;
while(!is_queue_empty(queue)) {
front = get_front(queue);
printf("Vertex %d touched.", front);
queue = dequeue(queue);
for(i = 0; i < size; i++) {
if(matrix[front][i] && !visited[i]) {
visited[i] = 1;
queue = enqueue(queue, i);
}
}
}
}
//----------------------------------------------------------------------------
int tn_fmem_delete(TN_FMP * fmp)
{
TN_INTSAVE_DATA
CDLL_QUEUE * que;
TN_TCB * task;
#if TN_CHECK_PARAM
if(fmp == NULL)
return TERR_WRONG_PARAM;
if(fmp->id_fmp != TN_ID_FSMEMORYPOOL)
return TERR_NOEXS;
#endif
TN_CHECK_NON_INT_CONTEXT
while(!is_queue_empty(&(fmp->wait_queue)))
{
tn_disable_interrupt();
//--- delete from sem wait queue
que = queue_remove_head(&(fmp->wait_queue));
task = get_task_by_tsk_queue(que);
if(task_wait_complete(task))
{
task->task_wait_rc = TERR_DLT;
tn_enable_interrupt();
tn_switch_context();
}
}
if(tn_chk_irq_disabled() == 0)
tn_disable_interrupt();
fmp->id_fmp = 0; //-- Fixed-size memory pool not exists now
tn_enable_interrupt();
return TERR_NO_ERR;
}
//----------------------------------------------------------------------------
int tn_sem_delete(TN_SEM * sem)
{
TN_INTSAVE_DATA
CDLL_QUEUE * que;
TN_TCB * task;
#if TN_CHECK_PARAM
if(sem == NULL)
return TERR_WRONG_PARAM;
if(sem->id_sem != TN_ID_SEMAPHORE)
return TERR_NOEXS;
#endif
TN_CHECK_NON_INT_CONTEXT
while(!is_queue_empty(&(sem->wait_queue)))
{
tn_disable_interrupt();
//--- delete from the sem wait queue
que = queue_remove_head(&(sem->wait_queue));
task = get_task_by_tsk_queue(que);
if(task_wait_complete(task))
{
task->task_wait_rc = TERR_DLT;
tn_enable_interrupt();
tn_switch_context();
}
}
if(tn_chk_irq_disabled() == 0) // int enable
tn_disable_interrupt();
sem->id_sem = 0; // Semaphore not exists now
tn_enable_interrupt();
return TERR_NO_ERR;
}
//----------------------------------------------------------------------------
int tn_fmem_release(TN_FMP * fmp,void * p_data)
{
TN_INTSAVE_DATA
CDLL_QUEUE * que;
TN_TCB * task;
#if TN_CHECK_PARAM
if(fmp == NULL || p_data == NULL)
return TERR_WRONG_PARAM;
if(fmp->id_fmp != TN_ID_FSMEMORYPOOL)
return TERR_NOEXS;
#endif
TN_CHECK_NON_INT_CONTEXT
tn_disable_interrupt();
if(!is_queue_empty(&(fmp->wait_queue)))
{
que = queue_remove_head(&(fmp->wait_queue));
task = get_task_by_tsk_queue(que);
task->data_elem = p_data;
if(task_wait_complete(task))
{
tn_enable_interrupt();
tn_switch_context();
return TERR_NO_ERR;
}
}
else
fm_put(fmp,p_data);
tn_enable_interrupt();
return TERR_NO_ERR;
}
//----------------------------------------------------------------------------
int tn_event_delete(TN_EVENT * evf)
{
TN_INTSAVE_DATA
CDLL_QUEUE * que;
TN_TCB * task;
#if TN_CHECK_PARAM
if(evf == NULL)
return TERR_WRONG_PARAM;
if(evf->id_event != TN_ID_EVENT)
return TERR_NOEXS;
#endif
TN_CHECK_NON_INT_CONTEXT
tn_disable_interrupt(); // v.2.7 - thanks to Eugene Scopal
while(!is_queue_empty(&(evf->wait_queue)))
{
//--- delete from sem wait queue
que = queue_remove_head(&(evf->wait_queue));
task = get_task_by_tsk_queue(que);
if(task_wait_complete(task))
{
task->task_wait_rc = TERR_DLT;
tn_enable_interrupt();
tn_switch_context();
tn_disable_interrupt(); // v.2.7
}
}
evf->id_event = 0; // Event not exists now
tn_enable_interrupt();
return TERR_NO_ERR;
}
//----------------------------------------------------------------------------
int tn_event_delete(TN_EVENT * evf)
{
TN_INTSAVE_DATA
CDLL_QUEUE * que;
TN_TCB * task;
if(evf == NULL)
return TERR_WRONG_PARAM;
if(evf->id_event != TN_ID_EVENT)
return TERR_NOEXS;
TN_CHECK_NON_INT_CONTEXT
while(!is_queue_empty(&(evf->wait_queue)))
{
if(tn_chk_irq_disabled() == 0) // int enable
tn_disable_interrupt();
//--- delete from sem wait queue
que = queue_remove_head(&(evf->wait_queue));
task = get_task_by_tsk_queue(que);
if(task_wait_complete(task,FALSE))
{
task->task_wait_rc = TERR_DLT;
tn_enable_interrupt();
tn_switch_context();
}
}
if(tn_chk_irq_disabled() == 0) // int enable
tn_disable_interrupt();
evf->id_event = 0; // Event not exists now
tn_enable_interrupt();
return TERR_NO_ERR;
}
void timer_i_process() {
MSG_BUF* message;
//void* message_envelope;
int receiver_id;
/* This code is only required if delayed_send() adds a message to timer i process message queue
But, we add the delayed message directly to the timeout queue */
// while (!is_queue_empty(&gp_pcbs[PID_TIMER_IPROC]->msg_queue)) {
// message_envelope = (MSG_BUF *)dequeue(&gp_pcbs[PID_TIMER_IPROC]->msg_queue);
// timeout_queue_enqueue(message_envelope);
// }
while (!is_queue_empty(&timeout_queue) &&
((MSG_BUF *)((&timeout_queue)->first))->m_kdata[0] <= g_timer_count) {
message = (MSG_BUF *)dequeue(&timeout_queue);
receiver_id = message->m_recv_pid;
if (k_send_message_helper(message->m_send_pid,receiver_id, message) == 1 &&
gp_pcbs[receiver_id]->m_priority < gp_current_process->m_priority) {
__enable_irq(); // atomic (off)
k_release_processor();
__disable_irq(); // atomic (on)
}
}
}
int main()
{
queue_t *q1 = mk_queue();
printf("%d\n", get_len(q1));
printf("%d\n", is_queue_empty(q1));
enqueue(q1, mk_task(f1,(void *) 5));
enqueue(q1, mk_task(f2, (void *)7));
printf("%d\n", get_len(q1));
printf("%d\n", is_queue_empty(q1));
enqueue(q1, mk_task(f2, (void *)2));
enqueue(q1, mk_task(f1, (void *)9));
printf("%d\n", get_len(q1));
printf("%d\n", is_queue_empty(q1));
run_task(dequeue(q1));
run_task(dequeue(q1));
printf("%d\n", get_len(q1));
printf("%d\n", is_queue_empty(q1));
run_task(dequeue(q1));
run_task(dequeue(q1));
printf("%d\n", get_len(q1));
printf("%d\n", is_queue_empty(q1));
empty_queue(q1);
enqueue(q1, mk_task(f2, (void *)2));
enqueue(q1, mk_task(f1, (void *)9));
printf("%d\n", get_len(q1));
printf("%d\n", is_queue_empty(q1));
destroy_queue(q1);
}
//----------------------------------------------------------------------------
int tn_queue_ireceive(TN_DQUE * dque,void ** data_ptr)
{
TN_INTSAVE_DATA_INT
int rc;
CDLL_QUEUE * que;
TN_TCB * task;
#if TN_CHECK_PARAM
if(dque == NULL || data_ptr == NULL)
return TERR_WRONG_PARAM;
if(dque->id_dque != TN_ID_DATAQUEUE)
return TERR_NOEXS;
#endif
TN_CHECK_INT_CONTEXT
tn_idisable_interrupt();
rc = dque_fifo_read(dque,data_ptr);
if(rc == TERR_NO_ERR) //-- There was entry(s) in data queue
{
if(!is_queue_empty(&(dque->wait_send_list)))
{
que = queue_remove_head(&(dque->wait_send_list));
task = get_task_by_tsk_queue(que);
dque_fifo_write(dque,task->data_elem); //-- Put to data FIFO
if(task_wait_complete(task))
{
tn_ienable_interrupt();
return TERR_NO_ERR;
}
}
}
else //-- data FIFO is empty
{
if(!is_queue_empty(&(dque->wait_send_list)))
{
que = queue_remove_head(&(dque->wait_send_list));
task = get_task_by_tsk_queue(que);
*data_ptr = task->data_elem; //-- Return to caller
if(task_wait_complete(task))
{
tn_ienable_interrupt();
return TERR_NO_ERR;
}
rc = TERR_NO_ERR;
}
else
{
rc = TERR_TIMEOUT;
}
}
tn_ienable_interrupt();
return rc;
}
//----------------------------------------------------------------------------
int tn_event_wait(TN_EVENT * evf,
unsigned int wait_pattern,
int wait_mode,
unsigned int * p_flags_pattern,
unsigned long timeout)
{
TN_INTSAVE_DATA
int rc;
int fCond;
#if TN_CHECK_PARAM
if(evf == NULL || wait_pattern == 0 ||
p_flags_pattern == NULL || timeout == 0)
return TERR_WRONG_PARAM;
if(evf->id_event != TN_ID_EVENT)
return TERR_NOEXS;
#endif
TN_CHECK_NON_INT_CONTEXT
tn_disable_interrupt();
//-- If event attr is TN_EVENT_ATTR_SINGLE and another task already
//-- in event wait queue - return ERROR without checking release condition
if((evf->attr & TN_EVENT_ATTR_SINGLE) && !is_queue_empty(&(evf->wait_queue)))
{
rc = TERR_ILUSE;
}
else
{
//-- Check release condition
if(wait_mode & TN_EVENT_WCOND_OR) //-- any setted bit is enough for release condition
fCond = ((evf->pattern & wait_pattern) != 0);
else //-- TN_EVENT_WCOND_AND is default mode
fCond = ((evf->pattern & wait_pattern) == wait_pattern);
if(fCond)
{
*p_flags_pattern = evf->pattern;
if(evf->attr & TN_EVENT_ATTR_CLR)
evf->pattern = 0;
rc = TERR_NO_ERR;
}
else
{
tn_curr_run_task->ewait_mode = wait_mode;
tn_curr_run_task->ewait_pattern = wait_pattern;
task_curr_to_wait_action(&(evf->wait_queue),
TSK_WAIT_REASON_EVENT,
timeout);
tn_enable_interrupt();
tn_switch_context();
if(tn_curr_run_task->task_wait_rc == TERR_NO_ERR)
*p_flags_pattern = tn_curr_run_task->ewait_pattern;
return tn_curr_run_task->task_wait_rc;
}
}
tn_enable_interrupt();
return rc;
}
