T: new view 'scolltti'

This view is used to display throughput (to come in next commits).

common/utils/T/tracer/view/Makefile

 CC=gcc
 CFLAGS=-Wall -g -pthread -I.. -I../logger
 
-OBJS=stdout.o textlist.o xy.o tti.o time.o ticktime.o
+OBJS=stdout.o textlist.o xy.o tti.o time.o ticktime.o scrolltti.o
 
 view.a: $(OBJS)
 	ar cr view.a $(OBJS)

common/utils/T/tracer/view/scrolltti.c

+#include "view.h"
+#include "../utils.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <stdarg.h>
+#include <string.h>
+#include <math.h>
+
+struct scrolltti {
+  view common;
+  gui *g;
+  widget *w;
+  widget *throughput_textarea;
+  int plot;
+  float refresh_rate;
+  pthread_mutex_t lock;
+  unsigned long data[1000];
+  unsigned long total;  /* sum data[0..999] to have smoother value printed */
+  float xout[1000];
+  float yout[1000];
+  int insert_point;
+};
+
+/* this array is used to get Y range 1000, 2000, 5000, 10000, ... */
+static int tolog[11] = { -1, 1, 2, 5, 5, 5, 10, 10, 10, 10, 10 };
+
+static void *scrolltti_thread(void *_this)
+{
+  struct scrolltti *this = _this;
+  int i;
+  int p;
+  float max, mlog;
+  char o[64];
+
+  while (1) {
+    if (pthread_mutex_lock(&this->lock)) abort();
+    /* TODO: optimize */
+    p = this->insert_point;
+    max = 0;
+    for (i = 0; i < 1000; i++) {
+      this->xout[i] = i;
+      this->yout[i] = this->data[p];
+      if (this->data[p] > max) max = this->data[p];
+      p = (p + 1) % 1000;
+    }
+    bps(o, this->total/1000., "b/s");
+    textarea_set_text(this->g, this->throughput_textarea, o);
+    /* for Y range we want 1000, 2000, 5000, 10000, 20000, 50000, etc. */
+    if (max < 1000) max = 1000;
+    mlog = pow(10, floor(log10(max)));
+    max = tolog[(int)ceil(max/mlog)] * mlog;
+    xy_plot_set_range(this->g, this->w, 0, 1000, 0, max);
+    xy_plot_set_points(this->g, this->w, this->plot,
+        1000, this->xout, this->yout);
+    if (pthread_mutex_unlock(&this->lock)) abort();
+    sleepms(1000/this->refresh_rate);
+  }
+
+  return 0;
+}
+
+static void clear(view *this)
+{
+  /* TODO */
+}
+
+static void append(view *_this, int frame, int subframe, double value)
+{
+  struct scrolltti *this = (struct scrolltti *)_this;
+
+  if (pthread_mutex_lock(&this->lock)) abort();
+  this->total -= this->data[this->insert_point];
+  this->data[this->insert_point] = value;
+  this->total += this->data[this->insert_point];
+  this->insert_point = (this->insert_point + 1) % 1000;
+  if (pthread_mutex_unlock(&this->lock)) abort();
+}
+
+view *new_view_scrolltti(float refresh_rate, gui *g, widget *w, int color,
+    widget *throughput_textarea)
+{
+  struct scrolltti *ret = calloc(1, sizeof(struct scrolltti));
+  if (ret == NULL) abort();
+
+  ret->common.clear = clear;
+  ret->common.append = (void (*)(view *, ...))append;
+
+  ret->refresh_rate = refresh_rate;
+  ret->g = g;
+  ret->w = w;
+  ret->throughput_textarea = throughput_textarea;
+  ret->plot = xy_plot_new_plot(g, w, color);
+
+  if (pthread_mutex_init(&ret->lock, NULL)) abort();
+
+  new_thread(scrolltti_thread, ret);
+
+  return (view *)ret;
+}

common/utils/T/tracer/view/view.h

@@ -19,6 +19,8 @@ view *new_view_xy(int length, float refresh_rate, gui *g, widget *w,
     int color, enum xy_mode mode);
 view *new_view_tti(float refresh_rate, gui *g, widget *w,
     int color);
+view *new_view_scrolltti(float refresh_rate, gui *g, widget *w,
+    int color, widget *throughput_label);
 view *new_view_time(int number_of_seconds, float refresh_rate,
     gui *g, widget *w);
 view *new_subview_time(view *time, int line, int color, int size);