gdb/python/py-continueevent.c

   1 /* Python interface to inferior continue events.
   2
   3    Copyright (C) 2009-2019 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "py-event.h"
  22 #include "py-ref.h"
  23 #include "gdbthread.h"
  24
  25 /* Create a gdb.ContinueEvent event.  gdb.ContinueEvent is-a
  26    gdb.ThreadEvent, and thread events can either be thread specific or
  27    process wide.  If gdb is running in non-stop mode then the event is
  28    thread specific (in which case the PTID thread is included in the
  29    event), otherwise it is process wide (in which case PTID is
  30    ignored).  In either case a new reference is returned.  */
  31
  32 static gdbpy_ref<>
  33 create_continue_event_object (ptid_t ptid)
  34 {
  35   gdbpy_ref<> py_thr = py_get_event_thread (ptid);
  36
  37   if (py_thr == nullptr)
  38     return nullptr;
  39
  40   return create_thread_event_object (&continue_event_object_type,
  41                                      py_thr.get ());
  42 }
  43
  44 /* Callback function which notifies observers when a continue event occurs.
  45    This function will create a new Python continue event object.
  46    Return -1 if emit fails.  */
  47
  48 int
  49 emit_continue_event (ptid_t ptid)
  50 {
  51   if (evregpy_no_listeners_p (gdb_py_events.cont))
  52     return 0;
  53
  54   gdbpy_ref<> event = create_continue_event_object (ptid);
  55   if (event != NULL)
  56     return evpy_emit_event (event.get (), gdb_py_events.cont);
  57   return -1;
  58 }