Home | History | Annotate | Line # | Download | only in python
py-newobjfileevent.c revision 1.7 
      1 /* Python interface to new object file loading events.
      2 
      3    Copyright (C) 2011-2017 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 
     23 extern PyTypeObject new_objfile_event_object_type
     24     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
     25 extern PyTypeObject clear_objfiles_event_object_type
     26     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
     27 
     28 static PyObject *
     29 create_new_objfile_event_object (struct objfile *objfile)
     30 {
     31   PyObject *py_objfile;
     32 
     33   gdbpy_ref<> objfile_event
     34     (create_event_object (&new_objfile_event_object_type));
     35   if (objfile_event == NULL)
     36     return NULL;
     37 
     38   /* Note that objfile_to_objfile_object returns a borrowed reference,
     39      so we don't need a decref here.  */
     40   py_objfile = objfile_to_objfile_object (objfile);
     41   if (!py_objfile || evpy_add_attribute (objfile_event.get (),
     42                                          "new_objfile",
     43                                          py_objfile) < 0)
     44     return NULL;
     45 
     46   return objfile_event.release ();
     47 }
     48 
     49 /* Callback function which notifies observers when a new objfile event occurs.
     50    This function will create a new Python new_objfile event object.
     51    Return -1 if emit fails.  */
     52 
     53 int
     54 emit_new_objfile_event (struct objfile *objfile)
     55 {
     56   if (evregpy_no_listeners_p (gdb_py_events.new_objfile))
     57     return 0;
     58 
     59   gdbpy_ref<> event (create_new_objfile_event_object (objfile));
     60   if (event != NULL)
     61     return evpy_emit_event (event.get (), gdb_py_events.new_objfile);
     62   return -1;
     63 }
     64 
     65 GDBPY_NEW_EVENT_TYPE (new_objfile,
     66                       "gdb.NewObjFileEvent",
     67                       "NewObjFileEvent",
     68                       "GDB new object file event object",
     69                       event_object_type);
     70 
     71 /* Subroutine of emit_clear_objfiles_event to simplify it.  */
     73 
     74 static PyObject *
     75 create_clear_objfiles_event_object (void)
     76 {
     77   PyObject *py_progspace;
     78 
     79   gdbpy_ref<> objfile_event
     80     (create_event_object (&clear_objfiles_event_object_type));
     81   if (objfile_event == NULL)
     82     return NULL;
     83 
     84   /* Note that pspace_to_pspace_object returns a borrowed reference,
     85      so we don't need a decref here.  */
     86   py_progspace = pspace_to_pspace_object (current_program_space);
     87   if (!py_progspace || evpy_add_attribute (objfile_event.get (),
     88 					   "progspace",
     89 					   py_progspace) < 0)
     90     return NULL;
     91 
     92   return objfile_event.release ();
     93 }
     94 
     95 /* Callback function which notifies observers when the "clear objfiles"
     96    event occurs.
     97    This function will create a new Python clear_objfiles event object.
     98    Return -1 if emit fails.  */
     99 
    100 int
    101 emit_clear_objfiles_event (void)
    102 {
    103   if (evregpy_no_listeners_p (gdb_py_events.clear_objfiles))
    104     return 0;
    105 
    106   gdbpy_ref<> event (create_clear_objfiles_event_object ());
    107   if (event != NULL)
    108     return evpy_emit_event (event.get (), gdb_py_events.clear_objfiles);
    109   return -1;
    110 }
    111 
    112 GDBPY_NEW_EVENT_TYPE (clear_objfiles,
    113 		      "gdb.ClearObjFilesEvent",
    114 		      "ClearObjFilesEvent",
    115 		      "GDB clear object files event object",
    116 		      event_object_type);
    117