From f2195ba4e3fa66e04c7cc77df90789e2b78f04ac Mon Sep 17 00:00:00 2001
From: Cedric Roux <cedric.roux@eurecom.fr>
Date: Fri, 29 Apr 2016 15:51:44 +0200
Subject: [PATCH] notification system (from user input to application
basically)
---
common/utils/T/tracer/gui/Makefile | 2 +-
common/utils/T/tracer/gui/gui.h | 15 ++++
common/utils/T/tracer/gui/gui_defs.h | 24 ++++++
common/utils/T/tracer/gui/notify.c | 120 +++++++++++++++++++++++++++
4 files changed, 160 insertions(+), 1 deletion(-)
create mode 100644 common/utils/T/tracer/gui/notify.c
diff --git a/common/utils/T/tracer/gui/Makefile b/common/utils/T/tracer/gui/Makefile
index 13820114dd..cc6a409e75 100644
--- a/common/utils/T/tracer/gui/Makefile
+++ b/common/utils/T/tracer/gui/Makefile
@@ -2,7 +2,7 @@ CC=gcc
CFLAGS=-Wall -g -pthread
OBJS=init.o loop.o toplevel_window.o x.o container.o widget.o \
- gui.o label.o event.o xy_plot.o text_list.o
+ gui.o label.o event.o xy_plot.o text_list.o notify.o
gui.a: $(OBJS)
ar cr gui.a $(OBJS)
diff --git a/common/utils/T/tracer/gui/gui.h b/common/utils/T/tracer/gui/gui.h
index 7646b0849e..b1321c1e49 100644
--- a/common/utils/T/tracer/gui/gui.h
+++ b/common/utils/T/tracer/gui/gui.h
@@ -36,4 +36,19 @@ void gunlock(gui *gui);
int new_color(gui *gui, char *color);
+/* notifications */
+/* known notifications:
+ * - text_list:
+ * - scrollup { }
+ * - scrolldown { }
+ * //- click { int line, int button }
+ */
+
+/* same type as in gui_defs.h */
+typedef void (*notifier)(void *private, gui *g,
+ char *notification, widget *w, void *notification_data);
+unsigned long register_notifier(gui *g, char *notification, widget *w,
+ notifier handler, void *private);
+void unregister_notifier(gui *g, unsigned long notifier_id);
+
#endif /* _GUI_H_ */
diff --git a/common/utils/T/tracer/gui/gui_defs.h b/common/utils/T/tracer/gui/gui_defs.h
index 8f680c9503..9bb22c9daa 100644
--- a/common/utils/T/tracer/gui/gui_defs.h
+++ b/common/utils/T/tracer/gui/gui_defs.h
@@ -143,6 +143,24 @@ struct repack_event {
int id;
};
+/*************************************************************************/
+/* notifications */
+/*************************************************************************/
+
+/* same type as in gui.h */
+typedef void (*notifier)(void *private, gui *g,
+ char *notification, widget *w, void *notification_data);
+
+struct notifier {
+ notifier handler;
+ unsigned long id;
+ char *notification;
+ widget *w;
+ void *private;
+ /* done is used bu gui_notify */
+ int done;
+};
+
/*************************************************************************/
/* main structure */
/*************************************************************************/
@@ -161,6 +179,9 @@ struct gui {
void *xwin; /* set by a toplevel_window when
* it paints itself, to be used
* by its children */
+ struct notifier *notifiers;
+ int notifiers_count;
+ unsigned long next_notifier_id;
};
/*************************************************************************/
@@ -178,4 +199,7 @@ void gui_events(gui *gui);
struct widget *find_widget(struct gui *g, int id);
+void gui_notify(struct gui *g, char *notification, widget *w,
+ void *notification_data);
+
#endif /* _GUI_DEFS_H_ */
diff --git a/common/utils/T/tracer/gui/notify.c b/common/utils/T/tracer/gui/notify.c
new file mode 100644
index 0000000000..dc6bc2fd59
--- /dev/null
+++ b/common/utils/T/tracer/gui/notify.c
@@ -0,0 +1,120 @@
+#include "gui.h"
+#include "gui_defs.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+unsigned long register_notifier(gui *_g, char *notification, widget *w,
+ notifier handler, void *private)
+{
+ struct gui *g = _g;
+ unsigned long ret;
+
+ glock(g);
+
+ if (g->next_notifier_id == 2UL * 1024 * 1024 * 1024)
+ { printf("%s:%d: report a bug\n", __FILE__, __LINE__); abort(); }
+
+ g->notifiers = realloc(g->notifiers,
+ (g->notifiers_count+1) * sizeof(struct notifier));
+ if (g->notifiers == NULL) abort();
+
+ ret = g->next_notifier_id;
+
+ g->notifiers[g->notifiers_count].handler = handler;
+ g->notifiers[g->notifiers_count].id = g->next_notifier_id;
+ g->next_notifier_id++;
+ g->notifiers[g->notifiers_count].notification = strdup(notification);
+ if (g->notifiers[g->notifiers_count].notification == NULL) abort();
+ g->notifiers[g->notifiers_count].w = w;
+ g->notifiers[g->notifiers_count].private = private;
+ /* initialize done to 1 so as not to call the handler if it's created
+ * by the call of another one that is in progress
+ */
+ g->notifiers[g->notifiers_count].done = 1;
+
+ g->notifiers_count++;
+
+ gunlock(g);
+
+ return ret;
+}
+
+void unregister_notifier(gui *_g, unsigned long notifier_id)
+{
+ struct gui *g = _g;
+ int i;
+
+ glock(g);
+
+ for (i = 0; i < g->notifiers_count; i++)
+ if (g->notifiers[i].id == notifier_id) break;
+
+ if (i == g->notifiers_count) {
+ printf("%s:%d: notifier_id %ld not found\n", __FILE__, __LINE__,
+ notifier_id);
+ abort();
+ }
+
+ free(g->notifiers[i].notification);
+
+ memmove(g->notifiers + i, g->notifiers + i + 1,
+ (g->notifiers_count-1 - i) * sizeof(struct notifier));
+
+ g->notifiers_count--;
+ g->notifiers = realloc(g->notifiers,
+ g->notifiers_count * sizeof(struct notifier));
+ if (g->notifiers == NULL) abort();
+
+ gunlock(g);
+}
+
+/* called with lock ON */
+void gui_notify(struct gui *g, char *notification, widget *w,
+ void *notification_data)
+{
+ void *private;
+ notifier handler;
+ int i;
+
+ /* this function is not re-entrant, for the moment keep as is
+ * and if the need is there, we'll make a new thread to handle
+ * notifications (or something)
+ * for now let's crash in case of recursive call
+ */
+ static int inside = 0;
+ if (inside)
+ {printf("%s:%d: BUG! contact the authors\n", __FILE__, __LINE__);abort();}
+ inside = 1;
+
+ /* clear all handlers */
+ /* TODO: speedup */
+ for (i = 0; i < g->notifiers_count; i++) g->notifiers[i].done = 0;
+
+ /* calling the handler may modify the list of notifiers, we
+ * need to be careful here
+ */
+loop:
+ for (i = 0; i < g->notifiers_count; i++) {
+ if (g->notifiers[i].done == 1 ||
+ g->notifiers[i].w != w ||
+ strcmp(g->notifiers[i].notification, notification) != 0)
+ continue;
+ break;
+ }
+ if (i == g->notifiers_count) goto done;
+
+ g->notifiers[i].done = 1;
+
+ handler = g->notifiers[i].handler;
+ private = g->notifiers[i].private;
+
+ gunlock(g);
+ handler(private, g, notification, w, notification_data);
+ glock(g);
+
+ goto loop;
+
+done:
+ inside = 0;
+}
--
GitLab