first version of the generic gui for the tracer

common/utils/T/tracer/gui/init.c

@@ -0,0 +1,29 @@
+#include "gui.h"
+#include "gui_defs.h"
+#include "x.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+gui *gui_init(void)
+{
+  struct gui *ret;
+
+  ret = calloc(1, sizeof(struct gui));
+  if (ret == NULL) OOM;
+
+  ret->lock = malloc(sizeof(pthread_mutex_t));
+  if (ret->lock == NULL) OOM;
+  if (pthread_mutex_init(ret->lock, NULL))
+    ERR("mutex initialization failed\n");
+
+  if (pipe(ret->event_pipe))
+    ERR("%s\n", strerror(errno));
+
+  ret->x = x_open();
+
+  return ret;
+}