aboutsummaryrefslogtreecommitdiff
path: root/system/pdp_queue.c
diff options
context:
space:
mode:
Diffstat (limited to 'system/pdp_queue.c')
-rw-r--r--system/pdp_queue.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/system/pdp_queue.c b/system/pdp_queue.c
deleted file mode 100644
index fe3748e..0000000
--- a/system/pdp_queue.c
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
- * Pure Data Packet - processor queue module.
- * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-
-
-/*
- this is a the processor queue pdp system module
- it receives tasks from objects that are schedules to
- be computed in another thread. the object is signalled back
- when the task is completed.
-
- this is not a standard pd class. it is a sigleton class
- using a standard pd clock to poll for compleded methods on
- every scheduler run. this is a hack to do thread synchronization
- in a thread unsafe pd.
-
- */
-
-#include "pdp.h"
-#include <pthread.h>
-#include <unistd.h>
-#include <stdio.h>
-
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-#define PDP_QUEUE_SIZE 1024
-#define PDP_QUEUE_DELTIME 1.0f;
-
-
-
-
-/********************* pdp process queue data *********************/
-
-typedef void (*t_pdpmethod)(void *client);
-
-/* the process queue data record */
-typedef struct process_queue_struct
-{
- void *x_owner; /* the object we are dealing with */
- t_pdpmethod x_process; /* the process method */
- t_pdpmethod x_callback; /* the function to be called when finished */
- int *x_queue_id; /* place to store the queue id for task */
-} t_process_queue;
-
-
-
-/* clock members */
-static t_clock *pdp_clock;
-static double deltime;
-
-/* some bookkeeping vars */
-static long long ticks;
-static long long packets;
-
-/* queue members */
-static t_process_queue *q; /* queue */
-static int mask;
-static int head; /* last entry in queue + 1 */
-static int tail; /* first entry in queque */
-static int curr; /* the object currently processed in other thread */
-
-/* pthread vars */
-static pthread_mutex_t mut;
-static pthread_cond_t cond_dataready;
-static pthread_cond_t cond_processingdone;
-static pthread_t thread_id;
-
-/* synchro pipes */
-static int pipe_fd[2];
-
-/* toggle for thread usage */
-static int use_thread;
-
-
-
-/* the methods */
-void pdp_queue_wait()
-{
- //post("pdp_pq_wait: waiting for pdp_queue_thread to finish processing");
- pthread_mutex_lock(&mut);
- while(((curr - head) & mask) != 0){
-
- pthread_cond_wait(&cond_processingdone, &mut);
- }
- pthread_mutex_unlock(&mut);
- //post("pdp_pq_wait: pdp_queue_thread has finished processing");
-
-}
-void pdp_queue_finish(int index)
-{
-
- if (-1 == index) {
- //post("pdp_pq_remove: index == -1");
- return;
- }
- /* wait for processing thread to finish*/
- pdp_queue_wait();
-
- /* invalidate callback at index */
- q[index & mask].x_callback = 0;
- q[index & mask].x_queue_id = 0;
-
-}
-
-static void pdp_queue_signal_processor(void)
-{
-
- pthread_mutex_lock(&mut);
- //post("signalling process thread");
- pthread_cond_signal(&cond_dataready);
- pthread_mutex_unlock(&mut);
- //post("signalling process thread done");
-
-}
-
-static void pdp_queue_wait_for_feeder(void)
-{
-
-
- /* only use locking when there is no data */
- if(((curr - head) & mask) == 0){
- pthread_mutex_lock(&mut);
-
- /* signal processing done */
- //post("pdp_queue_thread: signalling processing is done");
- pthread_cond_signal(&cond_processingdone);
-
- /* wait until there is an item in the queue */
- while(((curr - head) & mask) == 0){
- //post("waiting for feeder");
- pthread_cond_wait(&cond_dataready, &mut);
- //post("waiting for feeder done");
- }
-
- pthread_mutex_unlock(&mut);
-
- }
-}
-
-void pdp_queue_add(void *owner, void *process, void *callback, int *queue_id)
-{
- int i;
-
- /* if processing is in not in thread, just call the funcs */
- if (!use_thread){
- //post("pdp_queue_add: calling processing routine directly");
- *queue_id = -1;
- ((t_pdpmethod) process)(owner);
- ((t_pdpmethod) callback)(owner);
- return;
- }
-
-
-
- /* schedule method in thread queue */
- if (1 == ((tail - head) & mask)) {
- post("pdp_queue_add: WARNING: processing queue is full.\n");
- post("pdp_queue_add: WARNING: skipping process method, calling callback directly.\n");
- *queue_id = -1;
- ((t_pdpmethod) callback)(owner);
- }
-
-
-
- i = head & mask;
- q[i].x_owner = owner;
- q[i].x_process = process;
- q[i].x_callback = callback;
- q[i].x_queue_id = queue_id;
- *queue_id = i;
- //post("pdp_queue_add: added method to queue, index %d", i);
-
-
- // increase the packet count
- packets++;
-
- // move head forward
- head++;
-
- pdp_queue_signal_processor();
-
-}
-
-
-/* processing thread */
-static void *pdp_queue_thread(void *dummy)
-{
- while(1){
-
-
- /* wait until there is data available */
- pdp_queue_wait_for_feeder();
-
-
- //post("pdp_queue_thread: processing %d", curr);
-
-
- /* call the process routine */
- (q[curr & mask].x_process)(q[curr & mask].x_owner);
-
- /* advance */
- curr++;
-
-
- }
-}
-
-
-/* call back all the callbacks */
-static void pdp_queue_callback (void)
-{
-
- /* call callbacks for finished packets */
- while(0 != ((curr - tail) & mask))
- {
- int i = tail & mask;
- /* invalidate queue id */
- if(q[i].x_queue_id) *q[i].x_queue_id = -1;
- /* call callback */
- if(q[i].x_callback) (q[i].x_callback)(q[i].x_owner);
- //else post("pdp_pq_tick: callback %d is disabled",i );
- tail++;
- }
-
-}
-
-/* the clock method */
-static void pdp_queue_tick (void)
-{
- /* do work */
- //if (!(ticks % 1000)) post("pdp tick %d", ticks);
-
- if (!use_thread) return;
-
- /* call callbacks */
- pdp_queue_callback();
-
- /* increase counter */
- ticks++;
-
- /* set clock for next update */
- clock_delay(pdp_clock, deltime);
-}
-
-
-void pdp_queue_use_thread(int t)
-{
- /* if thread usage is being disabled,
- wait for thread to finish processing first */
- if (t == 0) {
- pdp_queue_wait();
- use_thread = 0;
- pdp_queue_callback();
- clock_unset(pdp_clock);
- }
- else {
- clock_unset(pdp_clock);
- clock_delay(pdp_clock, deltime);
- use_thread = 1;
- }
-
-}
-
-void pdp_queue_setup(void)
-{
- pthread_attr_t attr;
-
- /* setup pdp queue processor object */
- ticks = 0;
- deltime = PDP_QUEUE_DELTIME;
-
- /* setup queue data */
- mask = PDP_QUEUE_SIZE - 1;
- head = 0;
- tail = 0;
- curr = 0;
- q = getbytes(PDP_QUEUE_SIZE * sizeof(*q));
-
- /* enable threads */
- use_thread = 1;
-
- /* setup synchro stuff */
- pthread_mutex_init(&mut, NULL);
- pthread_cond_init(&cond_dataready, NULL);
- pthread_cond_init(&cond_processingdone, NULL);
-
-
- /* allocate the clock */
- pdp_clock = clock_new(0, (t_method)pdp_queue_tick);
-
- /* set the clock */
- clock_delay(pdp_clock, 0);
-
- /* start processing thread */
-
- /* glibc doc says SCHED_OTHER is default,
- but it seems not to be when initiated from a RT thread
- so we explicitly set it here */
- pthread_attr_init (&attr);
- //pthread_attr_setschedpolicy(&attr, SCHED_FIFO);
- pthread_attr_setschedpolicy(&attr, SCHED_OTHER);
- pthread_create(&thread_id, &attr, pdp_queue_thread, (void *)0);
-
-
-
- /* set default disable/enable thread here */
- pdp_queue_use_thread(0);
-
-}
-
-
-
-
-
-
-
-#ifdef __cplusplus
-}
-#endif
generated by cgit v1.2.1 (git 2.18.0) at 2024-09-10 18:36:22 +0000