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/* Python interface to inferior threads.

   Copyright (C) 2009, 2010 Free Software Foundation, Inc.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"

#include "exceptions.h"

#include "gdbthread.h"

#include "inferior.h"

#include "python-internal.h"

static PyTypeObject thread_object_type;

/* Require that INFERIOR be a valid inferior ID.  */

#define THPY_REQUIRE_VALID(Thread)                              \

  do {                                                          \

    if (!Thread->thread)                                        \

      {                                                         \

        PyErr_SetString (PyExc_RuntimeError,                    \

                         _("Thread no longer exists."));        \

        return NULL;                                            \

      }                                                         \

  } while (0)

thread_object *

create_thread_object (struct thread_info *tp)

{

  thread_object *thread_obj;

  thread_obj = PyObject_New (thread_object, &thread_object_type);

  if (!thread_obj)

    return NULL;

  thread_obj->thread = tp;

  thread_obj->inf_obj = find_inferior_object (PIDGET (tp->ptid));

  Py_INCREF (thread_obj->inf_obj);

  return thread_obj;

}

static void

thpy_dealloc (PyObject *self)

{

  Py_DECREF (((thread_object *) self)->inf_obj);

  self->ob_type->tp_free (self);

}

static PyObject *

thpy_get_num (PyObject *self, void *closure)

{

  thread_object *thread_obj = (thread_object *) self;

  THPY_REQUIRE_VALID (thread_obj);

  return PyLong_FromLong (thread_obj->thread->num);

}

/* Getter for InferiorThread.ptid  -> (pid, lwp, tid).

   Returns a tuple with the thread's ptid components.  */

static PyObject *

thpy_get_ptid (PyObject *self, void *closure)

{

  int pid;

  long tid, lwp;

  thread_object *thread_obj = (thread_object *) self;

  PyObject *ret;

  THPY_REQUIRE_VALID (thread_obj);

  ret = PyTuple_New (3);

  if (!ret)

    return NULL;

  pid = ptid_get_pid (thread_obj->thread->ptid);

  lwp = ptid_get_lwp (thread_obj->thread->ptid);

  tid = ptid_get_tid (thread_obj->thread->ptid);

  PyTuple_SET_ITEM (ret, 0, PyInt_FromLong (pid));

  PyTuple_SET_ITEM (ret, 1, PyInt_FromLong (lwp));

  PyTuple_SET_ITEM (ret, 2, PyInt_FromLong (tid));

  return ret;

}

/* Implementation of InferiorThread.switch ().

   Makes this the GDB selected thread.  */

static PyObject *

thpy_switch (PyObject *self, PyObject *args)

{

  thread_object *thread_obj = (thread_object *) self;

  struct cleanup *cleanup;

  volatile struct gdb_exception except;

  THPY_REQUIRE_VALID (thread_obj);

  TRY_CATCH (except, RETURN_MASK_ALL)

    {

      switch_to_thread (thread_obj->thread->ptid);

    }

  GDB_PY_HANDLE_EXCEPTION (except);

  Py_RETURN_NONE;

}

/* Implementation of InferiorThread.is_stopped () -> Boolean.

   Return whether the thread is stopped.  */

static PyObject *

thpy_is_stopped (PyObject *self, PyObject *args)

{

  thread_object *thread_obj = (thread_object *) self;

  THPY_REQUIRE_VALID (thread_obj);

  if (is_stopped (thread_obj->thread->ptid))

    Py_RETURN_TRUE;

  Py_RETURN_FALSE;

}

/* Implementation of InferiorThread.is_running () -> Boolean.

   Return whether the thread is running.  */

static PyObject *

thpy_is_running (PyObject *self, PyObject *args)

{

  thread_object *thread_obj = (thread_object *) self;

  THPY_REQUIRE_VALID (thread_obj);

  if (is_running (thread_obj->thread->ptid))

    Py_RETURN_TRUE;

  Py_RETURN_FALSE;

}

/* Implementation of InferiorThread.is_exited () -> Boolean.

   Return whether the thread is exited.  */

static PyObject *

thpy_is_exited (PyObject *self, PyObject *args)

{

  thread_object *thread_obj = (thread_object *) self;

  THPY_REQUIRE_VALID (thread_obj);

  if (is_exited (thread_obj->thread->ptid))

    Py_RETURN_TRUE;

  Py_RETURN_FALSE;

}

/* Implementation of gdb.selected_thread () -> gdb.InferiorThread.

   Returns the selected thread object.  */

PyObject *

gdbpy_selected_thread (PyObject *self, PyObject *args)

{

  PyObject *thread_obj;

  thread_obj = (PyObject *) find_thread_object (inferior_ptid);

  if (thread_obj)

    {

      Py_INCREF (thread_obj);

      return thread_obj;

    }

  Py_RETURN_NONE;

}

void

gdbpy_initialize_thread (void)

{

  if (PyType_Ready (&thread_object_type) < 0)

    return;

  Py_INCREF (&thread_object_type);

  PyModule_AddObject (gdb_module, "InferiorThread",

                      (PyObject *) &thread_object_type);

}

static PyGetSetDef thread_object_getset[] =

{

  { "num", thpy_get_num, NULL, "ID of the thread, as assigned by GDB.", NULL },

  { "ptid", thpy_get_ptid, NULL, "ID of the thread, as assigned by the OS.",

    NULL },

  { NULL }

};

static PyMethodDef thread_object_methods[] =

{

  { "switch", thpy_switch, METH_NOARGS,

    "switch ()\n\

Makes this the GDB selected thread." },

  { "is_stopped", thpy_is_stopped, METH_NOARGS,

    "is_stopped () -> Boolean\n\

Return whether the thread is stopped." },

  { "is_running", thpy_is_running, METH_NOARGS,

    "is_running () -> Boolean\n\

Return whether the thread is running." },

  { "is_exited", thpy_is_exited, METH_NOARGS,

    "is_exited () -> Boolean\n\

Return whether the thread is exited." },

  { NULL }

};

static PyTypeObject thread_object_type =

{

  PyObject_HEAD_INIT (NULL)

  0,                               /*ob_size*/

  "gdb.InferiorThread",           /*tp_name*/

  sizeof (thread_object),         /*tp_basicsize*/

  0,                               /*tp_itemsize*/

  thpy_dealloc,                   /*tp_dealloc*/

  0,                               /*tp_print*/

  0,                               /*tp_getattr*/

  0,                               /*tp_setattr*/

  0,                               /*tp_compare*/

  0,                               /*tp_repr*/

  0,                               /*tp_as_number*/

  0,                               /*tp_as_sequence*/

  0,                               /*tp_as_mapping*/

  0,                               /*tp_hash */

  0,                               /*tp_call*/

  0,                               /*tp_str*/

  0,                               /*tp_getattro*/

  0,                               /*tp_setattro*/

  0,                               /*tp_as_buffer*/

  Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER,  /*tp_flags*/

  "GDB thread object",            /* tp_doc */

  0,                               /* tp_traverse */

  0,                               /* tp_clear */

  0,                               /* tp_richcompare */

  0,                               /* tp_weaklistoffset */

  0,                               /* tp_iter */

  0,                               /* tp_iternext */

  thread_object_methods,          /* tp_methods */

  0,                               /* tp_members */

  thread_object_getset,           /* tp_getset */

  0,                               /* tp_base */

  0,                               /* tp_dict */

  0,                               /* tp_descr_get */

  0,                               /* tp_descr_set */

  0,                               /* tp_dictoffset */

  0,                               /* tp_init */

};