import gdb-1999-08-30 snapshot

1 files changed, 227 insertions, 0 deletions

diff --git a/gdb/gdb-events.c b/gdb/gdb-events.c
new file mode 100644
index 0000000..a8c4192
--- /dev/null
+++ b/gdb/gdb-events.c
@@ -0,0 +1,227 @@
+/* User Interface Events.
+   Copyright 1999 Free Software Foundation, Inc.
+
+   Contributed by Cygnus Solutions.
+
+This file is part of GDB.
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* Work in progress */
+
+/* This file was created with the aid of ``gdb-events.sh''.
+
+   The bourn shell script ``gdb-events.sh'' creates the files
+   ``new-gdb-events.c'' and ``new-gdb-events.h and then compares
+   them against the existing ``gdb-events.[hc]''.  Any differences
+   found being reported.
+
+   If editing this file, please also run gdb-events.sh and merge any
+   changes into that script. Conversely, when making sweeping changes
+   to this file, modifying gdb-events.sh and using its output may
+   prove easier. */
+
+
+#include "defs.h"
+#include "gdb-events.h"
+#include "gdbcmd.h"
+
+#undef XMALLOC
+#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
+
+#if WITH_GDB_EVENTS
+static struct gdb_events null_event_hooks;
+static struct gdb_events queue_event_hooks;
+static struct gdb_events *current_event_hooks = &null_event_hooks;
+#endif
+
+int gdb_events_debug;
+
+#if WITH_GDB_EVENTS
+
+void
+breakpoint_create_event (int b)
+{
+  if (gdb_events_debug)
+    fprintf_unfiltered (gdb_stdlog, "breakpoint_create_event\n");
+  if (!current_event_hooks->breakpoint_create)
+    return;
+  current_event_hooks->breakpoint_create (b);
+}
+
+void
+breakpoint_delete_event (int b)
+{
+  if (gdb_events_debug)
+    fprintf_unfiltered (gdb_stdlog, "breakpoint_delete_event\n");
+  if (!current_event_hooks->breakpoint_delete)
+    return;
+  current_event_hooks->breakpoint_delete (b);
+}
+
+void
+breakpoint_modify_event (int b)
+{
+  if (gdb_events_debug)
+    fprintf_unfiltered (gdb_stdlog, "breakpoint_modify_event\n");
+  if (!current_event_hooks->breakpoint_modify)
+    return;
+  current_event_hooks->breakpoint_modify (b);
+}
+
+#endif
+
+#if WITH_GDB_EVENTS
+void
+set_gdb_event_hooks (struct gdb_events *vector)
+{
+  if (vector == NULL)
+    current_event_hooks = &queue_event_hooks;
+  else
+    current_event_hooks = vector;
+}
+#endif
+
+enum gdb_event
+  {
+    breakpoint_create,
+    breakpoint_delete,
+    breakpoint_modify,
+    nr_gdb_events
+  };
+
+struct breakpoint_create
+  {
+    int b;
+  };
+
+struct breakpoint_delete
+  {
+    int b;
+  };
+
+struct breakpoint_modify
+  {
+    int b;
+  };
+
+struct event
+  {
+    enum gdb_event type;
+    struct event *next;
+    union
+      {
+        struct breakpoint_create breakpoint_create;
+        struct breakpoint_delete breakpoint_delete;
+        struct breakpoint_modify breakpoint_modify;
+      }
+    data;
+  };
+struct event *pending_events;
+struct event *delivering_events;
+
+static void
+append (struct event *new_event)
+{
+  struct event **event = &pending_events;
+  while ((*event) != NULL)
+    event = &((*event)->next);
+  (*event) = new_event;
+  (*event)->next = NULL;
+}
+
+static void
+queue_breakpoint_create (int b)
+{
+  struct event *event = XMALLOC (struct event);
+  event->type = breakpoint_create;
+  event->data.breakpoint_create.b = b;
+  append (event);
+}
+
+static void
+queue_breakpoint_delete (int b)
+{
+  struct event *event = XMALLOC (struct event);
+  event->type = breakpoint_delete;
+  event->data.breakpoint_delete.b = b;
+  append (event);
+}
+
+static void
+queue_breakpoint_modify (int b)
+{
+  struct event *event = XMALLOC (struct event);
+  event->type = breakpoint_modify;
+  event->data.breakpoint_modify.b = b;
+  append (event);
+}
+
+void
+gdb_events_deliver (struct gdb_events *vector)
+{
+  /* Just zap any events left around from last time. */
+  while (delivering_events != NULL)
+    {
+      struct event *event = delivering_events;
+      delivering_events = event->next;
+      free (event);
+    }
+  /* Process any pending events.  Because one of the deliveries could
+     bail out we move everything off of the pending queue onto an
+     in-progress queue where it can, later, be cleaned up if
+     necessary. */
+  delivering_events = pending_events;
+  pending_events = NULL;
+  while (delivering_events != NULL)
+    {
+      struct event *event = delivering_events;
+      switch (event->type)
+        {
+        case breakpoint_create:
+          vector->breakpoint_create
+            (event->data.breakpoint_create.b);
+          break;
+        case breakpoint_delete:
+          vector->breakpoint_delete
+            (event->data.breakpoint_delete.b);
+          break;
+        case breakpoint_modify:
+          vector->breakpoint_modify
+            (event->data.breakpoint_modify.b);
+          break;
+        }
+      delivering_events = event->next;
+      free (event);
+    }
+}
+
+void _initialize_gdb_events (void);
+void
+_initialize_gdb_events (void)
+{
+#if WITH_GDB_EVENTS
+  queue_event_hooks.breakpoint_create = queue_breakpoint_create;
+  queue_event_hooks.breakpoint_delete = queue_breakpoint_delete;
+  queue_event_hooks.breakpoint_modify = queue_breakpoint_modify;
+#endif
+  add_show_from_set (add_set_cmd ("eventdebug",
+                                  class_maintenance,
+                                  var_zinteger,
+                                  (char *)&gdb_events_debug,
+                                  "Set event debugging.\n\
+When non-zero, event/notify debugging is enabled.", &setlist),
+                     &showlist);
+}