/**
* Push new data onto the queue. Blocks if the queue is full. Once
* the push operation has completed, it signals other threads waiting
* in apr_queue_pop() that they may continue consuming sockets.
* @param timeout added by Cisco. now uses apr_thread_cond_timewait().
* interval of time to wait. zero means forever, negative indicates no wait,
* otherwise wait time in *microseconds*.
* @return APR_SUCCESS, APR_EAGAIN, APR_EOF, APR_EINTR, APR_TIMEUP,
* or some APR error
*/
apr_status_t etch_apr_queue_push(etch_apr_queue_t *queue,
apr_interval_time_t timeout,
void *data)
{
apr_status_t rv;
if (queue->terminated)
rv = APR_EOF; /* no more elements ever again */
else
if (APR_SUCCESS == (rv = apr_thread_mutex_lock(queue->one_big_mutex)))
{
do
{ if (etch_apr_queue_full(queue))
{
if (!queue->terminated)
{
if (-1 == timeout)
{ rv = APR_EAGAIN; /* asked to not wait */
break;
}
queue->full_waiters++;
if (0 == timeout)
rv = apr_thread_cond_wait(queue->not_full, queue->one_big_mutex);
else
rv = apr_thread_cond_timedwait(queue->not_full, queue->one_big_mutex, timeout);
queue->full_waiters--;
if (rv != APR_SUCCESS)
break;
}
/* If we wake up and it's still empty, then we were interrupted */
if (etch_apr_queue_full(queue))
{
Q_DBG("queue full (intr)", queue);
rv = queue->terminated? APR_EOF: APR_EINTR;
break;
}
}
queue->data[queue->in] = data;
queue->in = (queue->in + 1) % queue->bounds;
queue->nelts++;
if (queue->empty_waiters)
{
Q_DBG("sig !empty", queue);
rv = apr_thread_cond_signal(queue->not_empty);
}
} while(0);
apr_thread_mutex_unlock(queue->one_big_mutex);
}
return rv;
}
/**
* Retrieves the next item from the queue. If there are no
* items available, it will block until one becomes available.
* Once retrieved, the item is placed into the address specified by
* 'data'.
*/
APU_DECLARE(apr_status_t) apr_queue_pop(apr_queue_t *queue, void **data)
{
apr_status_t rv;
if (queue->terminated) {
return APR_EOF; /* no more elements ever again */
}
rv = apr_thread_mutex_lock(queue->one_big_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
/* Keep waiting until we wake up and find that the queue is not empty. */
if (apr_queue_empty(queue)) {
if (!queue->terminated) {
queue->empty_waiters++;
rv = apr_thread_cond_wait(queue->not_empty, queue->one_big_mutex);
queue->empty_waiters--;
if (rv != APR_SUCCESS) {
apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
}
/* If we wake up and it's still empty, then we were interrupted */
if (apr_queue_empty(queue)) {
Q_DBG("queue empty (intr)", queue);
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
if (queue->terminated) {
return APR_EOF; /* no more elements ever again */
}
else {
return APR_EINTR;
}
}
}
*data = queue->data[queue->out];
queue->nelts--;
queue->out = (queue->out + 1) % queue->bounds;
if (queue->full_waiters) {
Q_DBG("signal !full", queue);
rv = apr_thread_cond_signal(queue->not_full);
if (rv != APR_SUCCESS) {
apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
}
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
/**
* Push new data onto the queue. Blocks if the queue is full. Once
* the push operation has completed, it signals other threads waiting
* in apr_queue_pop() that they may continue consuming sockets.
*/
APU_DECLARE(apr_status_t) apr_queue_push(apr_queue_t *queue, void *data)
{
apr_status_t rv;
if (queue->terminated) {
return APR_EOF; /* no more elements ever again */
}
rv = apr_thread_mutex_lock(queue->one_big_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
if (apr_queue_full(queue)) {
if (!queue->terminated) {
queue->full_waiters++;
rv = apr_thread_cond_wait(queue->not_full, queue->one_big_mutex);
queue->full_waiters--;
if (rv != APR_SUCCESS) {
apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
}
/* If we wake up and it's still empty, then we were interrupted */
if (apr_queue_full(queue)) {
Q_DBG("queue full (intr)", queue);
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
if (queue->terminated) {
return APR_EOF; /* no more elements ever again */
}
else {
return APR_EINTR;
}
}
}
queue->data[queue->in] = data;
queue->in = (queue->in + 1) % queue->bounds;
queue->nelts++;
if (queue->empty_waiters) {
Q_DBG("sig !empty", queue);
rv = apr_thread_cond_signal(queue->not_empty);
if (rv != APR_SUCCESS) {
apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
}
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
/**
* Retrieves the next item from the queue. If there are no
* items available, it will block until one becomes available.
* Once retrieved, the item is placed into the address specified by
* 'data'.
*/
APU_DECLARE(apr_status_t) apr_queue_trypop(apr_queue_t *queue, void **data)
{
apr_status_t rv;
if (queue->terminated) {
return APR_EOF; /* no more elements ever again */
}
rv = apr_thread_mutex_lock(queue->one_big_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
/* Keep waiting until we wake up and find that the queue is not empty. */
if (apr_queue_empty(queue)) {
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
return APR_EAGAIN;
}
*data = queue->data[queue->out];
queue->nelts--;
queue->out = (queue->out + 1) % queue->bounds;
if (queue->full_waiters) {
Q_DBG("signal !full", queue);
rv = apr_thread_cond_signal(queue->not_full);
if (rv != APR_SUCCESS) {
apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
}
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
/**
* Push new data onto the queue. Blocks if the queue is full. Once
* the push operation has completed, it signals other threads waiting
* in apr_queue_pop() that they may continue consuming sockets.
*/
APU_DECLARE(apr_status_t) apr_queue_trypush(apr_queue_t *queue, void *data)
{
apr_status_t rv;
if (queue->terminated) {
return APR_EOF; /* no more elements ever again */
}
rv = apr_thread_mutex_lock(queue->one_big_mutex);
if (rv != APR_SUCCESS) {
return rv;
}
if (apr_queue_full(queue)) {
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
return APR_EAGAIN;
}
queue->data[queue->in] = data;
queue->in = (queue->in + 1) % queue->bounds;
queue->nelts++;
if (queue->empty_waiters) {
Q_DBG("sig !empty", queue);
rv = apr_thread_cond_signal(queue->not_empty);
if (rv != APR_SUCCESS) {
apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
}
rv = apr_thread_mutex_unlock(queue->one_big_mutex);
return rv;
}
/**
* Retrieves the next item from the queue. If there are no
* items available, return APR_EAGAIN. Once retrieved,
* the item is placed into the address specified by 'data'.
*/
apr_status_t etch_apr_queue_trypop(etch_apr_queue_t *queue, void **data)
{
apr_status_t rv;
if (queue->terminated)
rv = APR_EOF; /* no more elements ever again */
else
if (APR_SUCCESS == (rv = apr_thread_mutex_lock(queue->one_big_mutex)))
{
if (etch_apr_queue_empty(queue))
rv = APR_EAGAIN;
else
{ *data = queue->data[queue->out];
queue->nelts--;
queue->out = (queue->out + 1) % queue->bounds;
if (queue->full_waiters)
{
Q_DBG("signal !full", queue);
rv = apr_thread_cond_signal(queue->not_full);
}
}
apr_thread_mutex_unlock(queue->one_big_mutex);
}
return rv;
}
/**
* Push new data onto the queue. Blocks if the queue is full. Once
* the push operation has completed, it signals other threads waiting
* in apr_queue_pop() that they may continue consuming sockets.
*/
apr_status_t etch_apr_queue_trypush(etch_apr_queue_t *queue, void *data)
{
apr_status_t rv;
if (queue->terminated)
rv = APR_EOF;
else
if (APR_SUCCESS == (rv = apr_thread_mutex_lock(queue->one_big_mutex)))
{
if (etch_apr_queue_full(queue))
rv = APR_EAGAIN;
else
{ queue->data[queue->in] = data;
queue->in = (queue->in + 1) % queue->bounds;
queue->nelts++;
if (queue->empty_waiters)
{
Q_DBG("sig !empty", queue);
rv = apr_thread_cond_signal(queue->not_empty);
}
}
apr_thread_mutex_unlock(queue->one_big_mutex);
}
return rv;
}
/**
* etch_apr_queue_unsafe_interrupt_all()
* added by Cisco to opeate when lock already held since queue lock is not nestable.
*/
apr_status_t etch_apr_queue_unsafe_interrupt_all(etch_apr_queue_t *queue)
{
Q_DBG("intr all", queue);
apr_thread_cond_broadcast(queue->not_empty);
apr_thread_cond_broadcast(queue->not_full);
return APR_SUCCESS;
}
apr_status_t etch_apr_queue_interrupt_all(etch_apr_queue_t *queue)
{
apr_status_t rv;
Q_DBG("intr all", queue);
if (APR_SUCCESS == (rv = apr_thread_mutex_lock(queue->one_big_mutex)))
{
apr_thread_cond_broadcast(queue->not_empty);
apr_thread_cond_broadcast(queue->not_full);
apr_thread_mutex_unlock(queue->one_big_mutex);
}
return rv;
}
APU_DECLARE(apr_status_t) apr_queue_interrupt_all(apr_queue_t *queue)
{
apr_status_t rv;
Q_DBG("intr all", queue);
if ((rv = apr_thread_mutex_lock(queue->one_big_mutex)) != APR_SUCCESS) {
return rv;
}
apr_thread_cond_broadcast(queue->not_empty);
apr_thread_cond_broadcast(queue->not_full);
if ((rv = apr_thread_mutex_unlock(queue->one_big_mutex)) != APR_SUCCESS) {
return rv;
}
return APR_SUCCESS;
}
/**
* Retrieves the next item from the queue. If there are no
* items available, it will block until one becomes available.
* Once retrieved, the item is placed into the address specified by
* 'data'.
* @param timeout added by Cisco. now uses apr_thread_cond_timewait().
* interval of time to wait. zero means forever, -1 means no wait,
* -2 means don't wait and ignore queue closed indicator,
* otherwise timeout is blocking time in microseconds.
* @return APR_SUCCESS, APR_EAGAIN, APR_EOF, APR_EINTR, APR_TIMEUP,
* or some APR error
*/
apr_status_t etch_apr_queue_pop(etch_apr_queue_t *queue,
apr_interval_time_t timeout,
void **data)
{
apr_status_t rv;
if (queue->terminated) /* Cisco back door to clear closed queue */
{ if (timeout != ETCHQUEUE_CLEARING_CLOSED_QUEUE)
return APR_EOF; /* no more elements ever again */
}
if (APR_SUCCESS == (rv = apr_thread_mutex_lock(queue->one_big_mutex)))
{
do
{ /* Keep waiting until we wake up and find that the queue is not empty. */
if (etch_apr_queue_empty(queue))
{
if (-1 == timeout)
{ rv = APR_EAGAIN; /* asked to not wait */
break;
}
if (!queue->terminated)
{
queue->empty_waiters++;
if (0 == timeout)
rv = apr_thread_cond_wait(queue->not_empty, queue->one_big_mutex);
else
rv = apr_thread_cond_timedwait(queue->not_empty, queue->one_big_mutex, timeout);
queue->empty_waiters--;
if (rv != APR_SUCCESS) /* rv will be APR_TIMEUP if timed out */
break;
}
/* If we wake up and it's still empty, then we were interrupted */
if (etch_apr_queue_empty(queue))
{
Q_DBG("queue empty (intr)", queue);
rv = queue->terminated? APR_EOF: APR_EINTR;
break;
}
}
*data = queue->data[queue->out];
queue->nelts--;
queue->out = (queue->out + 1) % queue->bounds;
if (queue->full_waiters)
{
Q_DBG("signal !full", queue);
rv = apr_thread_cond_signal(queue->not_full);
}
} while(0);
apr_thread_mutex_unlock(queue->one_big_mutex);
}
return rv;
}
