static gpointer
g_thread_pool_wait_for_new_task (GRealThreadPool *pool)
{
gpointer task = NULL;
if (pool->running || (!pool->immediate &&
g_async_queue_length_unlocked (pool->queue) > 0))
{
/* This thread pool is still active. */
if (pool->num_threads > pool->max_threads && pool->max_threads != -1)
{
/* This is a superfluous thread, so it goes to the global pool. */
DEBUG_MSG (("superfluous thread %p in pool %p.",
g_thread_self (), pool));
}
else if (pool->pool.exclusive)
{
/* Exclusive threads stay attached to the pool. */
task = g_async_queue_pop_unlocked (pool->queue);
DEBUG_MSG (("thread %p in exclusive pool %p waits for task "
"(%d running, %d unprocessed).",
g_thread_self (), pool, pool->num_threads,
g_async_queue_length_unlocked (pool->queue)));
}
else
{
/* A thread will wait for new tasks for at most 1/2
* second before going to the global pool.
*/
GTimeVal end_time;
g_get_current_time (&end_time);
g_time_val_add (&end_time, G_USEC_PER_SEC / 2); /* 1/2 second */
DEBUG_MSG (("thread %p in pool %p waits for up to a 1/2 second for task "
"(%d running, %d unprocessed).",
g_thread_self (), pool, pool->num_threads,
g_async_queue_length_unlocked (pool->queue)));
task = g_async_queue_timed_pop_unlocked (pool->queue, &end_time);
}
}
else
{
/* This thread pool is inactive, it will no longer process tasks. */
DEBUG_MSG (("pool %p not active, thread %p will go to global pool "
"(running: %s, immediate: %s, len: %d).",
pool, g_thread_self (),
pool->running ? "true" : "false",
pool->immediate ? "true" : "false",
g_async_queue_length_unlocked (pool->queue)));
}
return task;
}
static void
player_av_set_position (Player *self, guint pos)
{
PlayerAVPrivate *priv = PLAYER_AV (self)->priv;
int stream = priv->astream;
int64_t seek_target = av_rescale_q (AV_TIME_BASE * pos, AV_TIME_BASE_Q,
priv->fctx->streams[stream]->time_base);
if (!av_seek_frame (priv->fctx, stream, seek_target, 0)) {
g_print ("It Failed\n");
} else {
g_print ("Seek OK?\n");
}
g_mutex_lock (priv->rp_mutex);
g_async_queue_lock (priv->apq);
g_async_queue_lock (priv->vpq);
while (g_async_queue_length_unlocked (priv->apq) > 0) {
AVPacket *packet = g_async_queue_pop_unlocked (priv->apq);
av_free_packet (packet);
av_free (packet);
}
while (g_async_queue_length_unlocked (priv->vpq) > 0) {
AVPacket *packet = g_async_queue_pop_unlocked (priv->vpq);
av_free_packet (packet);
av_free (packet);
}
avcodec_flush_buffers (priv->actx);
if (priv->vctx) {
avcodec_flush_buffers (priv->vctx);
}
g_async_queue_unlock (priv->apq);
g_async_queue_unlock (priv->vpq);
g_mutex_unlock (priv->rp_mutex);
switch (priv->state) {
case PLAYER_STATE_PLAYING:
break;
case PLAYER_STATE_PAUSED:
case PLAYER_STATE_STOPPED:
break;
default:
g_print ("Can not change position in current state\n");
};
// g_signal_emit (self, signal_pos, 0, player_av_get_position (self));
_player_emit_position_changed (PLAYER (self),
player_av_get_position (self));
}
/**
* g_thread_pool_free:
* @pool: a #GThreadPool
* @immediate: should @pool shut down immediately?
* @wait_: should the function wait for all tasks to be finished?
*
* Frees all resources allocated for @pool.
*
* If @immediate is %TRUE, no new task is processed for
* @pool. Otherwise @pool is not freed before the last task is
* processed. Note however, that no thread of this pool is
* interrupted, while processing a task. Instead at least all still
* running threads can finish their tasks before the @pool is freed.
*
* If @wait_ is %TRUE, the functions does not return before all tasks
* to be processed (dependent on @immediate, whether all or only the
* currently running) are ready. Otherwise the function returns immediately.
*
* After calling this function @pool must not be used anymore.
**/
void
g_thread_pool_free (GThreadPool *pool,
gboolean immediate,
gboolean wait_)
{
GRealThreadPool *real;
real = (GRealThreadPool*) pool;
g_return_if_fail (real);
g_return_if_fail (real->running);
/* If there's no thread allowed here, there is not much sense in
* not stopping this pool immediately, when it's not empty
*/
g_return_if_fail (immediate ||
real->max_threads != 0 ||
g_async_queue_length (real->queue) == 0);
g_async_queue_lock (real->queue);
real->running = FALSE;
real->immediate = immediate;
real->waiting = wait_;
if (wait_)
{
real->cond = g_cond_new ();
while (g_async_queue_length_unlocked (real->queue) != -real->num_threads &&
!(immediate && real->num_threads == 0))
g_cond_wait (real->cond, _g_async_queue_get_mutex (real->queue));
}
if (immediate || g_async_queue_length_unlocked (real->queue) == -real->num_threads)
{
/* No thread is currently doing something (and nothing is left
* to process in the queue)
*/
if (real->num_threads == 0)
{
/* No threads left, we clean up */
g_async_queue_unlock (real->queue);
g_thread_pool_free_internal (real);
return;
}
g_thread_pool_wakeup_and_stop_all (real);
}
/* The last thread should cleanup the pool */
real->waiting = FALSE;
g_async_queue_unlock (real->queue);
}
/* Swallow CLOSE_TOKEN items */
static gpointer
handle_close_token_ul (IrisQueue *queue,
gpointer item)
{
gint remaining_items;
if (item == NULL)
return NULL;
/* Filter close tokens. They must be the last items in the queue, so we can
* avoid filtering actual queue items that happen to be the same value.
*/
remaining_items = g_async_queue_length_unlocked (queue->priv->q) +
queue->priv->q->waiting_threads;
g_warn_if_fail (remaining_items >= queue->priv->close_token_count -1);
if ((queue->priv->close_token_count > 0) &&
remaining_items == queue->priv->close_token_count -1) {
g_warn_if_fail (item == CLOSE_TOKEN);
queue->priv->close_token_count --;
return NULL;
} else
return item;
}
/**
* g_thread_pool_push:
* @pool: a #GThreadPool
* @data: a new task for @pool
* @error: return location for error, or %NULL
*
* Inserts @data into the list of tasks to be executed by @pool.
*
* When the number of currently running threads is lower than the
* maximal allowed number of threads, a new thread is started (or
* reused) with the properties given to g_thread_pool_new().
* Otherwise, @data stays in the queue until a thread in this pool
* finishes its previous task and processes @data.
*
* @error can be %NULL to ignore errors, or non-%NULL to report
* errors. An error can only occur when a new thread couldn't be
* created. In that case @data is simply appended to the queue of
* work to do.
*
* Before version 2.32, this function did not return a success status.
*
* Returns: %TRUE on success, %FALSE if an error occurred
*/
gboolean
g_thread_pool_push (GThreadPool *pool,
gpointer data,
GError **error)
{
GRealThreadPool *real;
gboolean result;
real = (GRealThreadPool*) pool;
g_return_val_if_fail (real, FALSE);
g_return_val_if_fail (real->running, FALSE);
result = TRUE;
g_async_queue_lock (real->queue);
if (g_async_queue_length_unlocked (real->queue) >= 0)
{
/* No thread is waiting in the queue */
GError *local_error = NULL;
if (!g_thread_pool_start_thread (real, &local_error))
{
g_propagate_error (error, local_error);
result = FALSE;
}
}
g_thread_pool_queue_push_unlocked (real, data);
g_async_queue_unlock (real->queue);
return result;
}
void chassis_event_add_with_timeout(chassis *chas, struct event *ev, struct timeval *tv) {
chassis_event_op_t *op = chassis_event_op_new();
gssize ret;
op->type = CHASSIS_EVENT_OP_ADD;
op->ev = ev;
chassis_event_op_set_timeout(op, tv);
g_async_queue_push_unlocked(chas->event_queue, op);
g_debug("%s: cal chassis_event_add_with_timeout, fd:%d, timeout sec:%d,usec:%d",
G_STRLOC, chas->event_notify_fds[1],
(int) tv->tv_sec, (int) tv->tv_usec);
/* ping the event handler */
if (1 != (ret = send(chas->event_notify_fds[1], C("."), 0))) {
int last_errno;
last_errno = errno;
g_debug("%s: cal chassis_event_add_with_timeout, fd:%d errno:%d",
G_STRLOC, chas->event_notify_fds[1], last_errno);
switch (last_errno) {
case EAGAIN:
case E_NET_WOULDBLOCK:
/* that's fine ... */
g_debug("%s: send() to event-notify-pipe failed: %s (len = %d)",
G_STRLOC,
g_strerror(errno),
g_async_queue_length_unlocked(chas->event_queue));
break;
default:
g_critical("%s: send() to event-notify-pipe failed: %s (len = %d)",
G_STRLOC,
g_strerror(errno),
g_async_queue_length_unlocked(chas->event_queue));
break;
}
}
}
static gboolean
g_thread_pool_start_thread (GRealThreadPool *pool,
GError **error)
{
gboolean success = FALSE;
if (pool->num_threads >= pool->max_threads && pool->max_threads != -1)
/* Enough threads are already running */
return TRUE;
g_async_queue_lock (unused_thread_queue);
if (g_async_queue_length_unlocked (unused_thread_queue) < 0)
{
g_async_queue_push_unlocked (unused_thread_queue, pool);
success = TRUE;
}
g_async_queue_unlock (unused_thread_queue);
if (!success)
{
GThread *thread;
/* No thread was found, we have to start a new one */
G_LOCK (threads);
while (finished_threads != NULL)
{
thread = finished_threads->data;
finished_threads = g_slist_delete_link (finished_threads,
finished_threads);
G_UNLOCK (threads);
g_thread_join (thread);
G_LOCK (threads);
}
thread = g_thread_try_new ("pool", g_thread_pool_thread_proxy, pool, error);
if (thread != NULL)
active_threads = g_slist_prepend (active_threads, thread);
G_UNLOCK (threads);
if (thread == NULL)
return FALSE;
}
/* See comment in g_thread_pool_thread_proxy as to why this is done
* here and not there
*/
pool->num_threads++;
return TRUE;
}
/**
* g_thread_pool_set_max_threads:
* @pool: a #GThreadPool
* @max_threads: a new maximal number of threads for @pool,
* or -1 for unlimited
* @error: return location for error, or %NULL
*
* Sets the maximal allowed number of threads for @pool.
* A value of -1 means that the maximal number of threads
* is unlimited. If @pool is an exclusive thread pool, setting
* the maximal number of threads to -1 is not allowed.
*
* Setting @max_threads to 0 means stopping all work for @pool.
* It is effectively frozen until @max_threads is set to a non-zero
* value again.
*
* A thread is never terminated while calling @func, as supplied by
* g_thread_pool_new(). Instead the maximal number of threads only
* has effect for the allocation of new threads in g_thread_pool_push().
* A new thread is allocated, whenever the number of currently
* running threads in @pool is smaller than the maximal number.
*
* @error can be %NULL to ignore errors, or non-%NULL to report
* errors. An error can only occur when a new thread couldn't be
* created.
*
* Before version 2.32, this function did not return a success status.
*
* Returns: %TRUE on success, %FALSE if an error occurred
*/
gboolean
g_thread_pool_set_max_threads (GThreadPool *pool,
gint max_threads,
GError **error)
{
GRealThreadPool *real;
gint to_start;
gboolean result;
real = (GRealThreadPool*) pool;
g_return_val_if_fail (real, FALSE);
g_return_val_if_fail (real->running, FALSE);
g_return_val_if_fail (!real->pool.exclusive || max_threads != -1, FALSE);
g_return_val_if_fail (max_threads >= -1, FALSE);
result = TRUE;
g_async_queue_lock (real->queue);
real->max_threads = max_threads;
if (pool->exclusive)
to_start = real->max_threads - real->num_threads;
else
to_start = g_async_queue_length_unlocked (real->queue);
for ( ; to_start > 0; to_start--)
{
GError *local_error = NULL;
if (!g_thread_pool_start_thread (real, &local_error))
{
g_propagate_error (error, local_error);
result = FALSE;
break;
}
}
g_async_queue_unlock (real->queue);
return result;
}
static gpointer
iris_queue_real_timed_pop (IrisQueue *queue,
GTimeVal *timeout)
{
gpointer item;
g_async_queue_lock (queue->priv->q);
if (g_atomic_int_get (&queue->priv->open) == FALSE &&
g_async_queue_length_unlocked (queue->priv->q) <= 0) {
g_async_queue_unlock (queue->priv->q);
return NULL;
}
item = g_async_queue_timed_pop_unlocked (queue->priv->q, timeout);
if (g_atomic_int_get (&queue->priv->open) == FALSE)
item = handle_close_token_ul (queue, item);
g_async_queue_unlock (queue->priv->q);
return item;
}
/**
* g_thread_pool_push:
* @pool: a #GThreadPool
* @data: a new task for @pool
* @error: return location for error
*
* Inserts @data into the list of tasks to be executed by @pool. When
* the number of currently running threads is lower than the maximal
* allowed number of threads, a new thread is started (or reused) with
* the properties given to g_thread_pool_new (). Otherwise @data stays
* in the queue until a thread in this pool finishes its previous task
* and processes @data.
*
* @error can be %NULL to ignore errors, or non-%NULL to report
* errors. An error can only occur when a new thread couldn't be
* created. In that case @data is simply appended to the queue of work
* to do.
**/
void
g_thread_pool_push (GThreadPool *pool,
gpointer data,
GError **error)
{
GRealThreadPool *real;
real = (GRealThreadPool*) pool;
g_return_if_fail (real);
g_return_if_fail (real->running);
g_async_queue_lock (real->queue);
if (g_async_queue_length_unlocked (real->queue) >= 0)
/* No thread is waiting in the queue */
g_thread_pool_start_thread (real, error);
g_thread_pool_queue_push_unlocked (real, data);
g_async_queue_unlock (real->queue);
}
static gboolean
g_thread_pool_start_thread (GRealThreadPool *pool,
GError **error)
{
gboolean success = FALSE;
if (pool->num_threads >= pool->max_threads && pool->max_threads != -1)
/* Enough threads are already running */
return TRUE;
g_async_queue_lock (unused_thread_queue);
if (g_async_queue_length_unlocked (unused_thread_queue) < 0)
{
g_async_queue_push_unlocked (unused_thread_queue, pool);
success = TRUE;
}
g_async_queue_unlock (unused_thread_queue);
if (!success)
{
GThread *thread;
/* No thread was found, we have to start a new one */
thread = g_thread_try_new ("pool", g_thread_pool_thread_proxy, pool, error);
if (thread == NULL)
return FALSE;
g_thread_unref (thread);
}
/* See comment in g_thread_pool_thread_proxy as to why this is done
* here and not there
*/
pool->num_threads++;
return TRUE;
}
static void
g_thread_pool_start_thread (GRealThreadPool *pool,
GError **error)
{
gboolean success = FALSE;
if (pool->num_threads >= pool->max_threads && pool->max_threads != -1)
/* Enough threads are already running */
return;
g_async_queue_lock (unused_thread_queue);
if (g_async_queue_length_unlocked (unused_thread_queue) < 0)
{
g_async_queue_push_unlocked (unused_thread_queue, pool);
success = TRUE;
}
g_async_queue_unlock (unused_thread_queue);
if (!success)
{
GError *local_error = NULL;
/* No thread was found, we have to start a new one */
g_thread_create (g_thread_pool_thread_proxy, pool, FALSE, &local_error);
if (local_error)
{
g_propagate_error (error, local_error);
return;
}
}
/* See comment in g_thread_pool_thread_proxy as to why this is done
* here and not there
*/
pool->num_threads++;
}
void nids_pcap_handler(u_char * par, struct pcap_pkthdr *hdr, u_char * data)
{
u_char *data_aligned;
#ifdef HAVE_LIBGTHREAD_2_0
struct cap_queue_item *qitem;
#endif
#ifdef DLT_IEEE802_11
unsigned short fc;
int linkoffset_tweaked_by_prism_code = 0;
#endif
/*
* Check for savagely closed TCP connections. Might
* happen only when nids_params.tcp_workarounds is non-zero;
* otherwise nids_tcp_timeouts is always NULL.
*/
if (NULL != nids_tcp_timeouts)
tcp_check_timeouts(&hdr->ts);
nids_last_pcap_header = hdr;
nids_last_pcap_data = data;
(void)par; /* warnings... */
switch (linktype) {
case DLT_EN10MB:
if (hdr->caplen < 14)
return;
/* Only handle IP packets and 802.1Q VLAN tagged packets below. */
if (data[12] == 8 && data[13] == 0) {
/* Regular ethernet */
nids_linkoffset = 14;
} else if (data[12] == 0x81 && data[13] == 0) {
/* Skip 802.1Q VLAN and priority information */
nids_linkoffset = 18;
} else
/* non-ip frame */
return;
break;
#ifdef DLT_PRISM_HEADER
#ifndef DLT_IEEE802_11
#error DLT_PRISM_HEADER is defined, but DLT_IEEE802_11 is not ???
#endif
case DLT_PRISM_HEADER:
nids_linkoffset = 144; //sizeof(prism2_hdr);
linkoffset_tweaked_by_prism_code = 1;
//now let DLT_IEEE802_11 do the rest
#endif
#ifdef DLT_IEEE802_11
case DLT_IEEE802_11:
/* I don't know why frame control is always little endian, but it
* works for tcpdump, so who am I to complain? (wam)
*/
if (!linkoffset_tweaked_by_prism_code)
nids_linkoffset = 0;
fc = EXTRACT_LE_16BITS(data + nids_linkoffset);
if (FC_TYPE(fc) != T_DATA || FC_WEP(fc)) {
return;
}
if (FC_TO_DS(fc) && FC_FROM_DS(fc)) {
/* a wireless distribution system packet will have another
* MAC addr in the frame
*/
nids_linkoffset += 30;
} else {
nids_linkoffset += 24;
}
if (hdr->len < nids_linkoffset + LLC_FRAME_SIZE)
return;
if (ETHERTYPE_IP !=
EXTRACT_16BITS(data + nids_linkoffset + LLC_OFFSET_TO_TYPE_FIELD)) {
/* EAP, LEAP, and other 802.11 enhancements can be
* encapsulated within a data packet too. Look only at
* encapsulated IP packets (Type field of the LLC frame).
*/
return;
}
nids_linkoffset += LLC_FRAME_SIZE;
break;
#endif
default:;
}
if (hdr->caplen < nids_linkoffset)
return;
/*
* sure, memcpy costs. But many EXTRACT_{SHORT, LONG} macros cost, too.
* Anyway, libpcap tries to ensure proper layer 3 alignment (look for
* handle->offset in pcap sources), so memcpy should not be called.
*/
#ifdef LBL_ALIGN
if ((unsigned long) (data + nids_linkoffset) & 0x3) {
data_aligned = alloca(hdr->caplen - nids_linkoffset + 4);
data_aligned -= (unsigned long) data_aligned % 4;
memcpy(data_aligned, data + nids_linkoffset, hdr->caplen - nids_linkoffset);
} else
#endif
data_aligned = data + nids_linkoffset;
#ifdef HAVE_LIBGTHREAD_2_0
if(nids_params.multiproc) {
/*
* Insert received fragment into the async capture queue.
* We hope that the overhead of memcpy
* will be saturated by the benefits of SMP - mcree
*/
qitem=malloc(sizeof(struct cap_queue_item));
if (qitem && (qitem->data=malloc(hdr->caplen - nids_linkoffset))) {
qitem->caplen=hdr->caplen - nids_linkoffset;
memcpy(qitem->data,data_aligned,qitem->caplen);
g_async_queue_lock(cap_queue);
/* ensure queue does not overflow */
if(g_async_queue_length_unlocked(cap_queue) > nids_params.queue_limit) {
/* queue limit reached: drop packet - should we notify user via syslog? */
free(qitem->data);
free(qitem);
} else {
/* insert packet to queue */
g_async_queue_push_unlocked(cap_queue,qitem);
}
g_async_queue_unlock(cap_queue);
}
} else { /* user requested simple passthru - no threading */
call_ip_frag_procs(data_aligned,hdr->caplen - nids_linkoffset, &hdr->ts);
}
#else
call_ip_frag_procs(data_aligned,hdr->caplen - nids_linkoffset, &hdr->ts);
#endif
}
static gpointer
g_thread_pool_thread_proxy (gpointer data)
{
GRealThreadPool *pool;
pool = data;
DEBUG_MSG (("thread %p started for pool %p.", g_thread_self (), pool));
g_async_queue_lock (pool->queue);
while (TRUE)
{
gpointer task;
task = g_thread_pool_wait_for_new_task (pool);
if (task)
{
if (pool->running || !pool->immediate)
{
/* A task was received and the thread pool is active,
* so execute the function.
*/
g_async_queue_unlock (pool->queue);
DEBUG_MSG (("thread %p in pool %p calling func.",
g_thread_self (), pool));
pool->pool.func (task, pool->pool.user_data);
g_async_queue_lock (pool->queue);
}
}
else
{
/* No task was received, so this thread goes to the global pool. */
gboolean free_pool = FALSE;
DEBUG_MSG (("thread %p leaving pool %p for global pool.",
g_thread_self (), pool));
pool->num_threads--;
if (!pool->running)
{
if (!pool->waiting)
{
if (pool->num_threads == 0)
{
/* If the pool is not running and no other
* thread is waiting for this thread pool to
* finish and this is the last thread of this
* pool, free the pool.
*/
free_pool = TRUE;
}
else
{
/* If the pool is not running and no other
* thread is waiting for this thread pool to
* finish and this is not the last thread of
* this pool and there are no tasks left in the
* queue, wakeup the remaining threads.
*/
if (g_async_queue_length_unlocked (pool->queue) ==
- pool->num_threads)
g_thread_pool_wakeup_and_stop_all (pool);
}
}
else if (pool->immediate ||
g_async_queue_length_unlocked (pool->queue) <= 0)
{
/* If the pool is not running and another thread is
* waiting for this thread pool to finish and there
* are either no tasks left or the pool shall stop
* immediately, inform the waiting thread of a change
* of the thread pool state.
*/
g_cond_broadcast (&pool->cond);
}
}
g_async_queue_unlock (pool->queue);
if (free_pool)
g_thread_pool_free_internal (pool);
if ((pool = g_thread_pool_wait_for_new_pool ()) == NULL)
break;
g_async_queue_lock (pool->queue);
DEBUG_MSG (("thread %p entering pool %p from global pool.",
g_thread_self (), pool));
/* pool->num_threads++ is not done here, but in
* g_thread_pool_start_thread to make the new started
* thread known to the pool before itself can do it.
*/
}
}
return NULL;
}
