first version of textlog with GUI

introducing generic "view" with two instantiations: stdout and textlist

common/utils/T/tracer/view/Makefile

@@ -0,0 +1,13 @@
+CC=gcc
+CFLAGS=-Wall -g -pthread -I..
+
+OBJS=stdout.o textlist.o
+
+view.a: $(OBJS)
+	ar cr view.a $(OBJS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $@ -c $<
+
+clean:
+	rm -f *.a *.o

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

@@ -0,0 +1,35 @@
+#include "view.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+
+struct stdout {
+  view common;
+  pthread_mutex_t lock;
+};
+
+static void clear(view *this)
+{
+  /* do nothing */
+}
+
+static void append(view *_this, char *s)
+{
+  struct stdout *this = (struct stdout *)_this;
+  if (pthread_mutex_lock(&this->lock)) abort();
+  printf("%s\n", s);
+  if (pthread_mutex_unlock(&this->lock)) abort();
+}
+
+view *new_stdout(void)
+{
+  struct stdout *ret = calloc(1, sizeof(struct stdout));
+  if (ret == NULL) abort();
+
+  ret->common.clear = clear;
+  ret->common.append = (void (*)(view *, ...))append;
+
+  if (pthread_mutex_init(&ret->lock, NULL)) abort();
+
+  return (view *)ret;
+}

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

@@ -0,0 +1,85 @@
+#include "view.h"
+#include "../utils.h"
+#include "gui/gui.h"
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+
+struct textlist {
+  view common;
+  gui *g;
+  widget *w;
+  int maxsize;
+  int cursize;
+  float refresh_rate;
+  int autoscroll;
+  pthread_mutex_t lock;
+  list * volatile to_append;
+};
+
+static void _append(struct textlist *this, char *s)
+{
+  if (this->cursize == this->maxsize) {
+    text_list_del(this->g, this->w, 0);
+    this->cursize--;
+  }
+  text_list_add(this->g, this->w, s, -1);
+  this->cursize++;
+}
+
+static void *textlist_thread(void *_this)
+{
+  struct textlist *this = _this;
+
+  while (1) {
+    if (pthread_mutex_lock(&this->lock)) abort();
+    while (this->to_append != NULL) {
+      char *s = this->to_append->data;
+      this->to_append = list_remove_head(this->to_append);
+      _append(this, s);
+      free(s);
+    }
+    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, char *s)
+{
+  struct textlist *this = (struct textlist *)_this;
+  char *dup;
+
+  if (pthread_mutex_lock(&this->lock)) abort();
+  dup = strdup(s); if (dup == NULL) abort();
+  this->to_append = list_append(this->to_append, dup);
+  if (pthread_mutex_unlock(&this->lock)) abort();
+}
+
+view *new_textlist(int maxsize, float refresh_rate, gui *g, widget *w)
+{
+  struct textlist *ret = calloc(1, sizeof(struct textlist));
+  if (ret == NULL) abort();
+
+  ret->common.clear = clear;
+  ret->common.append = (void (*)(view *, ...))append;
+
+  ret->cursize = 0;
+  ret->maxsize = maxsize;
+  ret->refresh_rate = refresh_rate;
+  ret->g = g;
+  ret->w = w;
+  ret->autoscroll = 1;
+
+  if (pthread_mutex_init(&ret->lock, NULL)) abort();
+
+  new_thread(textlist_thread, ret);
+
+  return (view *)ret;
+}

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

@@ -0,0 +1,16 @@
+#ifndef _VIEW_H_
+#define _VIEW_H_
+
+#include "gui/gui.h"
+
+/* defines the public API of views */
+
+typedef struct view {
+  void (*clear)(struct view *this);
+  void (*append)(struct view *this, ...);
+} view;
+
+view *new_stdout(void);
+view *new_textlist(int maxsize, float refresh_rate, gui *g, widget *w);
+
+#endif /* _VIEW_H_ */