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py-newobjfileevent.c revision 1.3.2.1 
      1 /* Python interface to new object file loading events.
      2 
      3    Copyright (C) 2011-2015 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 *objfile_event;
     32   PyObject *py_objfile;
     33 
     34   objfile_event = create_event_object (&new_objfile_event_object_type);
     35   if (!objfile_event)
     36     goto fail;
     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,
     42                                          "new_objfile",
     43                                          py_objfile) < 0)
     44     goto fail;
     45 
     46   return objfile_event;
     47 
     48  fail:
     49   Py_XDECREF (objfile_event);
     50   return NULL;
     51 }
     52 
     53 /* Callback function which notifies observers when a new objfile event occurs.
     54    This function will create a new Python new_objfile event object.
     55    Return -1 if emit fails.  */
     56 
     57 int
     58 emit_new_objfile_event (struct objfile *objfile)
     59 {
     60   PyObject *event;
     61 
     62   if (evregpy_no_listeners_p (gdb_py_events.new_objfile))
     63     return 0;
     64 
     65   event = create_new_objfile_event_object (objfile);
     66   if (event)
     67     return evpy_emit_event (event, gdb_py_events.new_objfile);
     68   return -1;
     69 }
     70 
     71 GDBPY_NEW_EVENT_TYPE (new_objfile,
     72                       "gdb.NewObjFileEvent",
     73                       "NewObjFileEvent",
     74                       "GDB new object file event object",
     75                       event_object_type);
     76 
     77 /* Subroutine of emit_clear_objfiles_event to simplify it.  */
     79 
     80 static PyObject *
     81 create_clear_objfiles_event_object (void)
     82 {
     83   PyObject *objfile_event;
     84   PyObject *py_progspace;
     85 
     86   objfile_event = create_event_object (&clear_objfiles_event_object_type);
     87   if (!objfile_event)
     88     goto fail;
     89 
     90   /* Note that pspace_to_pspace_object returns a borrowed reference,
     91      so we don't need a decref here.  */
     92   py_progspace = pspace_to_pspace_object (current_program_space);
     93   if (!py_progspace || evpy_add_attribute (objfile_event,
     94 					   "progspace",
     95 					   py_progspace) < 0)
     96     goto fail;
     97 
     98   return objfile_event;
     99 
    100  fail:
    101   Py_XDECREF (objfile_event);
    102   return NULL;
    103 }
    104 
    105 /* Callback function which notifies observers when the "clear objfiles"
    106    event occurs.
    107    This function will create a new Python clear_objfiles event object.
    108    Return -1 if emit fails.  */
    109 
    110 int
    111 emit_clear_objfiles_event (void)
    112 {
    113   PyObject *event;
    114 
    115   if (evregpy_no_listeners_p (gdb_py_events.clear_objfiles))
    116     return 0;
    117 
    118   event = create_clear_objfiles_event_object ();
    119   if (event)
    120     return evpy_emit_event (event, gdb_py_events.clear_objfiles);
    121   return -1;
    122 }
    123 
    124 GDBPY_NEW_EVENT_TYPE (clear_objfiles,
    125 		      "gdb.ClearObjFilesEvent",
    126 		      "ClearObjFilesEvent",
    127 		      "GDB clear object files event object",
    128 		      event_object_type);
    129