1 files changed, 783 insertions, 0 deletions

diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c
new file mode 100644
index 000000000000..3afc7cc0c9a7
--- /dev/null
+++ b/sound/core/seq/seq_queue.c
@@ -0,0 +1,783 @@
+/*
+ *   ALSA sequencer Timing queue handling
+ *   Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ * MAJOR CHANGES
+ *   Nov. 13, 1999      Takashi Iwai <iwai@ww.uni-erlangen.de>
+ *     - Queues are allocated dynamically via ioctl.
+ *     - When owner client is deleted, all owned queues are deleted, too.
+ *     - Owner of unlocked queue is kept unmodified even if it is
+ *       manipulated by other clients.
+ *     - Owner field in SET_QUEUE_OWNER ioctl must be identical with the
+ *       caller client.  i.e. Changing owner to a third client is not
+ *       allowed.
+ *
+ *  Aug. 30, 2000       Takashi Iwai
+ *     - Queues are managed in static array again, but with better way.
+ *       The API itself is identical.
+ *     - The queue is locked when queue_t pinter is returned via
+ *       queueptr().  This pointer *MUST* be released afterward by
+ *       queuefree(ptr).
+ *     - Addition of experimental sync support.
+ */
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+
+#include "seq_memory.h"
+#include "seq_queue.h"
+#include "seq_clientmgr.h"
+#include "seq_fifo.h"
+#include "seq_timer.h"
+#include "seq_info.h"
+
+/* list of allocated queues */
+static queue_t *queue_list[SNDRV_SEQ_MAX_QUEUES];
+static DEFINE_SPINLOCK(queue_list_lock);
+/* number of queues allocated */
+static int num_queues;
+
+int snd_seq_queue_get_cur_queues(void)
+{
+        return num_queues;
+}
+
+/*----------------------------------------------------------------*/
+
+/* assign queue id and insert to list */
+static int queue_list_add(queue_t *q)
+{
+        int i;
+        unsigned long flags;
+
+        spin_lock_irqsave(&queue_list_lock, flags);
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if (! queue_list[i]) {
+                        queue_list[i] = q;
+                        q->queue = i;
+                        num_queues++;
+                        spin_unlock_irqrestore(&queue_list_lock, flags);
+                        return i;
+                }
+        }
+        spin_unlock_irqrestore(&queue_list_lock, flags);
+        return -1;
+}
+
+static queue_t *queue_list_remove(int id, int client)
+{
+        queue_t *q;
+        unsigned long flags;
+
+        spin_lock_irqsave(&queue_list_lock, flags);
+        q = queue_list[id];
+        if (q) {
+                spin_lock(&q->owner_lock);
+                if (q->owner == client) {
+                        /* found */
+                        q->klocked = 1;
+                        spin_unlock(&q->owner_lock);
+                        queue_list[id] = NULL;
+                        num_queues--;
+                        spin_unlock_irqrestore(&queue_list_lock, flags);
+                        return q;
+                }
+                spin_unlock(&q->owner_lock);
+        }
+        spin_unlock_irqrestore(&queue_list_lock, flags);
+        return NULL;
+}
+
+/*----------------------------------------------------------------*/
+
+/* create new queue (constructor) */
+static queue_t *queue_new(int owner, int locked)
+{
+        queue_t *q;
+
+        q = kcalloc(1, sizeof(*q), GFP_KERNEL);
+        if (q == NULL) {
+                snd_printd("malloc failed for snd_seq_queue_new()\n");
+                return NULL;
+        }
+
+        spin_lock_init(&q->owner_lock);
+        spin_lock_init(&q->check_lock);
+        init_MUTEX(&q->timer_mutex);
+        snd_use_lock_init(&q->use_lock);
+        q->queue = -1;
+
+        q->tickq = snd_seq_prioq_new();
+        q->timeq = snd_seq_prioq_new();
+        q->timer = snd_seq_timer_new();
+        if (q->tickq == NULL || q->timeq == NULL || q->timer == NULL) {
+                snd_seq_prioq_delete(&q->tickq);
+                snd_seq_prioq_delete(&q->timeq);
+                snd_seq_timer_delete(&q->timer);
+                kfree(q);
+                return NULL;
+        }
+
+        q->owner = owner;
+        q->locked = locked;
+        q->klocked = 0;
+
+        return q;
+}
+
+/* delete queue (destructor) */
+static void queue_delete(queue_t *q)
+{
+        /* stop and release the timer */
+        snd_seq_timer_stop(q->timer);
+        snd_seq_timer_close(q);
+        /* wait until access free */
+        snd_use_lock_sync(&q->use_lock);
+        /* release resources... */
+        snd_seq_prioq_delete(&q->tickq);
+        snd_seq_prioq_delete(&q->timeq);
+        snd_seq_timer_delete(&q->timer);
+
+        kfree(q);
+}
+
+
+/*----------------------------------------------------------------*/
+
+/* setup queues */
+int __init snd_seq_queues_init(void)
+{
+        /*
+        memset(queue_list, 0, sizeof(queue_list));
+        num_queues = 0;
+        */
+        return 0;
+}
+
+/* delete all existing queues */
+void __exit snd_seq_queues_delete(void)
+{
+        int i;
+
+        /* clear list */
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if (queue_list[i])
+                        queue_delete(queue_list[i]);
+        }
+}
+
+/* allocate a new queue -
+ * return queue index value or negative value for error
+ */
+int snd_seq_queue_alloc(int client, int locked, unsigned int info_flags)
+{
+        queue_t *q;
+
+        q = queue_new(client, locked);
+        if (q == NULL)
+                return -ENOMEM;
+        q->info_flags = info_flags;
+        if (queue_list_add(q) < 0) {
+                queue_delete(q);
+                return -ENOMEM;
+        }
+        snd_seq_queue_use(q->queue, client, 1); /* use this queue */
+        return q->queue;
+}
+
+/* delete a queue - queue must be owned by the client */
+int snd_seq_queue_delete(int client, int queueid)
+{
+        queue_t *q;
+
+        if (queueid < 0 || queueid >= SNDRV_SEQ_MAX_QUEUES)
+                return -EINVAL;
+        q = queue_list_remove(queueid, client);
+        if (q == NULL)
+                return -EINVAL;
+        queue_delete(q);
+
+        return 0;
+}
+
+
+/* return pointer to queue structure for specified id */
+queue_t *queueptr(int queueid)
+{
+        queue_t *q;
+        unsigned long flags;
+
+        if (queueid < 0 || queueid >= SNDRV_SEQ_MAX_QUEUES)
+                return NULL;
+        spin_lock_irqsave(&queue_list_lock, flags);
+        q = queue_list[queueid];
+        if (q)
+                snd_use_lock_use(&q->use_lock);
+        spin_unlock_irqrestore(&queue_list_lock, flags);
+        return q;
+}
+
+/* return the (first) queue matching with the specified name */
+queue_t *snd_seq_queue_find_name(char *name)
+{
+        int i;
+        queue_t *q;
+
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if ((q = queueptr(i)) != NULL) {
+                        if (strncmp(q->name, name, sizeof(q->name)) == 0)
+                                return q;
+                        queuefree(q);
+                }
+        }
+        return NULL;
+}
+
+
+/* -------------------------------------------------------- */
+
+void snd_seq_check_queue(queue_t *q, int atomic, int hop)
+{
+        unsigned long flags;
+        snd_seq_event_cell_t *cell;
+
+        if (q == NULL)
+                return;
+
+        /* make this function non-reentrant */
+        spin_lock_irqsave(&q->check_lock, flags);
+        if (q->check_blocked) {
+                q->check_again = 1;
+                spin_unlock_irqrestore(&q->check_lock, flags);
+                return;         /* other thread is already checking queues */
+        }
+        q->check_blocked = 1;
+        spin_unlock_irqrestore(&q->check_lock, flags);
+
+      __again:
+        /* Process tick queue... */
+        while ((cell = snd_seq_prioq_cell_peek(q->tickq)) != NULL) {
+                if (snd_seq_compare_tick_time(&q->timer->tick.cur_tick, &cell->event.time.tick)) {
+                        cell = snd_seq_prioq_cell_out(q->tickq);
+                        if (cell)
+                                snd_seq_dispatch_event(cell, atomic, hop);
+                } else {
+                        /* event remains in the queue */
+                        break;
+                }
+        }
+
+
+        /* Process time queue... */
+        while ((cell = snd_seq_prioq_cell_peek(q->timeq)) != NULL) {
+                if (snd_seq_compare_real_time(&q->timer->cur_time, &cell->event.time.time)) {
+                        cell = snd_seq_prioq_cell_out(q->timeq);
+                        if (cell)
+                                snd_seq_dispatch_event(cell, atomic, hop);
+                } else {
+                        /* event remains in the queue */
+                        break;
+                }
+        }
+
+        /* free lock */
+        spin_lock_irqsave(&q->check_lock, flags);
+        if (q->check_again) {
+                q->check_again = 0;
+                spin_unlock_irqrestore(&q->check_lock, flags);
+                goto __again;
+        }
+        q->check_blocked = 0;
+        spin_unlock_irqrestore(&q->check_lock, flags);
+}
+
+
+/* enqueue a event to singe queue */
+int snd_seq_enqueue_event(snd_seq_event_cell_t *cell, int atomic, int hop)
+{
+        int dest, err;
+        queue_t *q;
+
+        snd_assert(cell != NULL, return -EINVAL);
+        dest = cell->event.queue;       /* destination queue */
+        q = queueptr(dest);
+        if (q == NULL)
+                return -EINVAL;
+        /* handle relative time stamps, convert them into absolute */
+        if ((cell->event.flags & SNDRV_SEQ_TIME_MODE_MASK) == SNDRV_SEQ_TIME_MODE_REL) {
+                switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) {
+                case SNDRV_SEQ_TIME_STAMP_TICK:
+                        cell->event.time.tick += q->timer->tick.cur_tick;
+                        break;
+
+                case SNDRV_SEQ_TIME_STAMP_REAL:
+                        snd_seq_inc_real_time(&cell->event.time.time, &q->timer->cur_time);
+                        break;
+                }
+                cell->event.flags &= ~SNDRV_SEQ_TIME_MODE_MASK;
+                cell->event.flags |= SNDRV_SEQ_TIME_MODE_ABS;
+        }
+        /* enqueue event in the real-time or midi queue */
+        switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) {
+        case SNDRV_SEQ_TIME_STAMP_TICK:
+                err = snd_seq_prioq_cell_in(q->tickq, cell);
+                break;
+
+        case SNDRV_SEQ_TIME_STAMP_REAL:
+        default:
+                err = snd_seq_prioq_cell_in(q->timeq, cell);
+                break;
+        }
+
+        if (err < 0) {
+                queuefree(q); /* unlock */
+                return err;
+        }
+
+        /* trigger dispatching */
+        snd_seq_check_queue(q, atomic, hop);
+
+        queuefree(q); /* unlock */
+
+        return 0;
+}
+
+
+/*----------------------------------------------------------------*/
+
+static inline int check_access(queue_t *q, int client)
+{
+        return (q->owner == client) || (!q->locked && !q->klocked);
+}
+
+/* check if the client has permission to modify queue parameters.
+ * if it does, lock the queue
+ */
+static int queue_access_lock(queue_t *q, int client)
+{
+        unsigned long flags;
+        int access_ok;
+        
+        spin_lock_irqsave(&q->owner_lock, flags);
+        access_ok = check_access(q, client);
+        if (access_ok)
+                q->klocked = 1;
+        spin_unlock_irqrestore(&q->owner_lock, flags);
+        return access_ok;
+}
+
+/* unlock the queue */
+static inline void queue_access_unlock(queue_t *q)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&q->owner_lock, flags);
+        q->klocked = 0;
+        spin_unlock_irqrestore(&q->owner_lock, flags);
+}
+
+/* exported - only checking permission */
+int snd_seq_queue_check_access(int queueid, int client)
+{
+        queue_t *q = queueptr(queueid);
+        int access_ok;
+        unsigned long flags;
+
+        if (! q)
+                return 0;
+        spin_lock_irqsave(&q->owner_lock, flags);
+        access_ok = check_access(q, client);
+        spin_unlock_irqrestore(&q->owner_lock, flags);
+        queuefree(q);
+        return access_ok;
+}
+
+/*----------------------------------------------------------------*/
+
+/*
+ * change queue's owner and permission
+ */
+int snd_seq_queue_set_owner(int queueid, int client, int locked)
+{
+        queue_t *q = queueptr(queueid);
+
+        if (q == NULL)
+                return -EINVAL;
+
+        if (! queue_access_lock(q, client)) {
+                queuefree(q);
+                return -EPERM;
+        }
+
+        q->locked = locked ? 1 : 0;
+        q->owner = client;
+        queue_access_unlock(q);
+        queuefree(q);
+
+        return 0;
+}
+
+
+/*----------------------------------------------------------------*/
+
+/* open timer -
+ * q->use mutex should be down before calling this function to avoid
+ * confliction with snd_seq_queue_use()
+ */
+int snd_seq_queue_timer_open(int queueid)
+{
+        int result = 0;
+        queue_t *queue;
+        seq_timer_t *tmr;
+
+        queue = queueptr(queueid);
+        if (queue == NULL)
+                return -EINVAL;
+        tmr = queue->timer;
+        if ((result = snd_seq_timer_open(queue)) < 0) {
+                snd_seq_timer_defaults(tmr);
+                result = snd_seq_timer_open(queue);
+        }
+        queuefree(queue);
+        return result;
+}
+
+/* close timer -
+ * q->use mutex should be down before calling this function
+ */
+int snd_seq_queue_timer_close(int queueid)
+{
+        queue_t *queue;
+        seq_timer_t *tmr;
+        int result = 0;
+
+        queue = queueptr(queueid);
+        if (queue == NULL)
+                return -EINVAL;
+        tmr = queue->timer;
+        snd_seq_timer_close(queue);
+        queuefree(queue);
+        return result;
+}
+
+/* change queue tempo and ppq */
+int snd_seq_queue_timer_set_tempo(int queueid, int client, snd_seq_queue_tempo_t *info)
+{
+        queue_t *q = queueptr(queueid);
+        int result;
+
+        if (q == NULL)
+                return -EINVAL;
+        if (! queue_access_lock(q, client)) {
+                queuefree(q);
+                return -EPERM;
+        }
+
+        result = snd_seq_timer_set_tempo(q->timer, info->tempo);
+        if (result >= 0)
+                result = snd_seq_timer_set_ppq(q->timer, info->ppq);
+        if (result >= 0 && info->skew_base > 0)
+                result = snd_seq_timer_set_skew(q->timer, info->skew_value, info->skew_base);
+        queue_access_unlock(q);
+        queuefree(q);
+        return result;
+}
+
+
+/* use or unuse this queue -
+ * if it is the first client, starts the timer.
+ * if it is not longer used by any clients, stop the timer.
+ */
+int snd_seq_queue_use(int queueid, int client, int use)
+{
+        queue_t *queue;
+
+        queue = queueptr(queueid);
+        if (queue == NULL)
+                return -EINVAL;
+        down(&queue->timer_mutex);
+        if (use) {
+                if (!test_and_set_bit(client, queue->clients_bitmap))
+                        queue->clients++;
+        } else {
+                if (test_and_clear_bit(client, queue->clients_bitmap))
+                        queue->clients--;
+        }
+        if (queue->clients) {
+                if (use && queue->clients == 1)
+                        snd_seq_timer_defaults(queue->timer);
+                snd_seq_timer_open(queue);
+        } else {
+                snd_seq_timer_close(queue);
+        }
+        up(&queue->timer_mutex);
+        queuefree(queue);
+        return 0;
+}
+
+/*
+ * check if queue is used by the client
+ * return negative value if the queue is invalid.
+ * return 0 if not used, 1 if used.
+ */
+int snd_seq_queue_is_used(int queueid, int client)
+{
+        queue_t *q;
+        int result;
+
+        q = queueptr(queueid);
+        if (q == NULL)
+                return -EINVAL; /* invalid queue */
+        result = test_bit(client, q->clients_bitmap) ? 1 : 0;
+        queuefree(q);
+        return result;
+}
+
+
+/*----------------------------------------------------------------*/
+
+/* notification that client has left the system -
+ * stop the timer on all queues owned by this client
+ */
+void snd_seq_queue_client_termination(int client)
+{
+        unsigned long flags;
+        int i;
+        queue_t *q;
+
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if ((q = queueptr(i)) == NULL)
+                        continue;
+                spin_lock_irqsave(&q->owner_lock, flags);
+                if (q->owner == client)
+                        q->klocked = 1;
+                spin_unlock_irqrestore(&q->owner_lock, flags);
+                if (q->owner == client) {
+                        if (q->timer->running)
+                                snd_seq_timer_stop(q->timer);
+                        snd_seq_timer_reset(q->timer);
+                }
+                queuefree(q);
+        }
+}
+
+/* final stage notification -
+ * remove cells for no longer exist client (for non-owned queue)
+ * or delete this queue (for owned queue)
+ */
+void snd_seq_queue_client_leave(int client)
+{
+        int i;
+        queue_t *q;
+
+        /* delete own queues from queue list */
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if ((q = queue_list_remove(i, client)) != NULL)
+                        queue_delete(q);
+        }
+
+        /* remove cells from existing queues -
+         * they are not owned by this client
+         */
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if ((q = queueptr(i)) == NULL)
+                        continue;
+                if (test_bit(client, q->clients_bitmap)) {
+                        snd_seq_prioq_leave(q->tickq, client, 0);
+                        snd_seq_prioq_leave(q->timeq, client, 0);
+                        snd_seq_queue_use(q->queue, client, 0);
+                }
+                queuefree(q);
+        }
+}
+
+
+
+/*----------------------------------------------------------------*/
+
+/* remove cells from all queues */
+void snd_seq_queue_client_leave_cells(int client)
+{
+        int i;
+        queue_t *q;
+
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if ((q = queueptr(i)) == NULL)
+                        continue;
+                snd_seq_prioq_leave(q->tickq, client, 0);
+                snd_seq_prioq_leave(q->timeq, client, 0);
+                queuefree(q);
+        }
+}
+
+/* remove cells based on flush criteria */
+void snd_seq_queue_remove_cells(int client, snd_seq_remove_events_t *info)
+{
+        int i;
+        queue_t *q;
+
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if ((q = queueptr(i)) == NULL)
+                        continue;
+                if (test_bit(client, q->clients_bitmap) &&
+                    (! (info->remove_mode & SNDRV_SEQ_REMOVE_DEST) ||
+                     q->queue == info->queue)) {
+                        snd_seq_prioq_remove_events(q->tickq, client, info);
+                        snd_seq_prioq_remove_events(q->timeq, client, info);
+                }
+                queuefree(q);
+        }
+}
+
+/*----------------------------------------------------------------*/
+
+/*
+ * send events to all subscribed ports
+ */
+static void queue_broadcast_event(queue_t *q, snd_seq_event_t *ev, int atomic, int hop)
+{
+        snd_seq_event_t sev;
+
+        sev = *ev;
+        
+        sev.flags = SNDRV_SEQ_TIME_STAMP_TICK|SNDRV_SEQ_TIME_MODE_ABS;
+        sev.time.tick = q->timer->tick.cur_tick;
+        sev.queue = q->queue;
+        sev.data.queue.queue = q->queue;
+
+        /* broadcast events from Timer port */
+        sev.source.client = SNDRV_SEQ_CLIENT_SYSTEM;
+        sev.source.port = SNDRV_SEQ_PORT_SYSTEM_TIMER;
+        sev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS;
+        snd_seq_kernel_client_dispatch(SNDRV_SEQ_CLIENT_SYSTEM, &sev, atomic, hop);
+}
+
+/*
+ * process a received queue-control event.
+ * this function is exported for seq_sync.c.
+ */
+void snd_seq_queue_process_event(queue_t *q, snd_seq_event_t *ev, int atomic, int hop)
+{
+        switch (ev->type) {
+        case SNDRV_SEQ_EVENT_START:
+                snd_seq_prioq_leave(q->tickq, ev->source.client, 1);
+                snd_seq_prioq_leave(q->timeq, ev->source.client, 1);
+                if (! snd_seq_timer_start(q->timer))
+                        queue_broadcast_event(q, ev, atomic, hop);
+                break;
+
+        case SNDRV_SEQ_EVENT_CONTINUE:
+                if (! snd_seq_timer_continue(q->timer))
+                        queue_broadcast_event(q, ev, atomic, hop);
+                break;
+
+        case SNDRV_SEQ_EVENT_STOP:
+                snd_seq_timer_stop(q->timer);
+                queue_broadcast_event(q, ev, atomic, hop);
+                break;
+
+        case SNDRV_SEQ_EVENT_TEMPO:
+                snd_seq_timer_set_tempo(q->timer, ev->data.queue.param.value);
+                queue_broadcast_event(q, ev, atomic, hop);
+                break;
+
+        case SNDRV_SEQ_EVENT_SETPOS_TICK:
+                if (snd_seq_timer_set_position_tick(q->timer, ev->data.queue.param.time.tick) == 0) {
+                        queue_broadcast_event(q, ev, atomic, hop);
+                }
+                break;
+
+        case SNDRV_SEQ_EVENT_SETPOS_TIME:
+                if (snd_seq_timer_set_position_time(q->timer, ev->data.queue.param.time.time) == 0) {
+                        queue_broadcast_event(q, ev, atomic, hop);
+                }
+                break;
+        case SNDRV_SEQ_EVENT_QUEUE_SKEW:
+                if (snd_seq_timer_set_skew(q->timer,
+                                           ev->data.queue.param.skew.value,
+                                           ev->data.queue.param.skew.base) == 0) {
+                        queue_broadcast_event(q, ev, atomic, hop);
+                }
+                break;
+        }
+}
+
+
+/*
+ * Queue control via timer control port:
+ * this function is exported as a callback of timer port.
+ */
+int snd_seq_control_queue(snd_seq_event_t *ev, int atomic, int hop)
+{
+        queue_t *q;
+
+        snd_assert(ev != NULL, return -EINVAL);
+        q = queueptr(ev->data.queue.queue);
+
+        if (q == NULL)
+                return -EINVAL;
+
+        if (! queue_access_lock(q, ev->source.client)) {
+                queuefree(q);
+                return -EPERM;
+        }
+
+        snd_seq_queue_process_event(q, ev, atomic, hop);
+
+        queue_access_unlock(q);
+        queuefree(q);
+        return 0;
+}
+
+
+/*----------------------------------------------------------------*/
+
+/* exported to seq_info.c */
+void snd_seq_info_queues_read(snd_info_entry_t *entry, 
+                              snd_info_buffer_t * buffer)
+{
+        int i, bpm;
+        queue_t *q;
+        seq_timer_t *tmr;
+
+        for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
+                if ((q = queueptr(i)) == NULL)
+                        continue;
+
+                tmr = q->timer;
+                if (tmr->tempo)
+                        bpm = 60000000 / tmr->tempo;
+                else
+                        bpm = 0;
+
+                snd_iprintf(buffer, "queue %d: [%s]\n", q->queue, q->name);
+                snd_iprintf(buffer, "owned by client    : %d\n", q->owner);
+                snd_iprintf(buffer, "lock status        : %s\n", q->locked ? "Locked" : "Free");
+                snd_iprintf(buffer, "queued time events : %d\n", snd_seq_prioq_avail(q->timeq));
+                snd_iprintf(buffer, "queued tick events : %d\n", snd_seq_prioq_avail(q->tickq));
+                snd_iprintf(buffer, "timer state        : %s\n", tmr->running ? "Running" : "Stopped");
+                snd_iprintf(buffer, "timer PPQ          : %d\n", tmr->ppq);
+                snd_iprintf(buffer, "current tempo      : %d\n", tmr->tempo);
+                snd_iprintf(buffer, "current BPM        : %d\n", bpm);
+                snd_iprintf(buffer, "current time       : %d.%09d s\n", tmr->cur_time.tv_sec, tmr->cur_time.tv_nsec);
+                snd_iprintf(buffer, "current tick       : %d\n", tmr->tick.cur_tick);
+                snd_iprintf(buffer, "\n");
+                queuefree(q);
+        }
+}