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#ident "@(#) $Id: pgnotify.c,v 1.8 2003/07/14 21:27:38 ballie01 Exp $"
/* vi:set sw=4 ts=8 showmode ai: */
/**(H+)*****************************************************************\
| Name: pgnotify.c |
| |
| Description: This file contains code to implement the backend notify |
| object in Python. |
|=======================================================================|
| Copyright 2001 by Billy G. Allie. |
| All rights reserved. |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, pro- |
| vided that the above copyright notice appear in all copies and that |
| both that copyright notice and this permission notice appear in sup- |
| porting documentation, and that the copyright owner's name not be |
| used in advertising or publicity pertaining to distribution of the |
| software without specific, written prior permission. |
| |
| THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN |
| NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS |
| OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE |
| OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE |
| USE OR PERFORMANCE OF THIS SOFTWARE. |
|=======================================================================|
| Revision History: |
| |
| Date Ini Description |
| --------- --- ------------------------------------------------------- |
| 28MAY2003 bga Fixed a bug in the code. The code in question use to |
| work, but doesn't anymore (possible change to libpq?). |
| 06SEP2001 bga Clarified an embedded assignment within an if test. |
| 30AUG2001 bga Use PyObject_Del() instead of PyMem_Free() in dealloc() |
| to delete the object. |
| 28AUG2001 bga Changed calls to PyObject_DEL() to Py_XDECREF() when |
| deleting objects embedded in my extension objects. |
| This corrects a problem expirenced on MS Windows. |
| --- Picked some lint from the code. |
| 20AUG2001 bga Constant, read-only attributes are now stored as Python |
| objects. This way they do not have to be created each |
| time they are referenced. |
| 06AUG2001 bga Initial release by Billy G. Allie. |
\*(H-)******************************************************************/
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <ctype.h>
#include <Python.h>
#include <structmember.h>
#include <fileobject.h>
#include "libpqmodule.h"
PyObject *PgNotify_New(PGnotify *note)
{
PgNotify *self = (PgNotify *)NULL;
if (note == (PGnotify *)NULL)
{
Py_INCREF(Py_None);
self = (PgNotify *)Py_None;
}
else if ((self = (PgNotify *)PyObject_New(PgNotify, &PgNotify_Type)) !=
(PgNotify *)NULL)
{
self->relname = Py_BuildValue("s", note->relname);
self->be_pid = Py_BuildValue("i", note->be_pid);
free(note);
if (PyErr_Occurred())
{
Py_XDECREF(self->relname);
Py_XDECREF(self->be_pid);
PyObject_Del(self);
return (PyObject *)NULL;
}
}
return (PyObject *)self;
}
static void PgNotify_dealloc(PgNotify *self)
{
Py_XDECREF(self->relname);
Py_XDECREF(self->be_pid);
PyObject_Del((PyObject *)self);
}
static PyObject *PgNotify_repr(PgNotify *self)
{
char buf[100];
(void)sprintf(buf, "<PgNotify instance at %p of %s from backend pid %ld>",
(void *)self, PyString_AsString(self->relname),
PyInt_AsLong(self->be_pid));
return Py_BuildValue("s", buf);
}
/***********************************************************************\
| Define the PgNotify methods. |
\***********************************************************************/
/* THERE ARE NO PgNotify METHODS! */
#define NoOFF(x) offsetof(PgNotify, x)
static struct memberlist PgNotify_members[] = {
{ "relname", T_OBJECT, NoOFF(relname), RO },
{ "be_pid", T_OBJECT, NoOFF(be_pid), RO },
{ NULL }
};
/*--------------------------------------------------------------------------*/
static PyObject *PgNotify_getattr(PgNotify *self, char* attr)
{
if (!strcmp(attr, "__module__"))
return Py_BuildValue("s", MODULE_NAME);
if (!strcmp(attr, "__class__"))
return Py_BuildValue("s", self->ob_type->tp_name);
return PyMember_Get((char *)self, PgNotify_members, attr);
}
/*--------------------------------------------------------------------------*/
static char PgNotify_Type_Doc[] = "This is the type of PgNotify objects";
PyTypeObject PgNotify_Type = {
PyObject_HEAD_INIT(NULL)
(int)NULL, /*ob_size*/
MODULE_NAME ".PgNotify", /*tp_name*/
sizeof(PgNotify), /*tp_basicsize*/
(int)NULL, /*tp_itemsize*/
(destructor)PgNotify_dealloc, /*tp_dealloc*/
(printfunc)NULL, /*tp_print*/
(getattrfunc)PgNotify_getattr, /*tp_getattr*/
(setattrfunc)NULL, /*tp_setattr*/
NULL, /*tp_compare*/
(reprfunc)PgNotify_repr, /*tp_repr*/
NULL, /*tp_as_number*/
NULL, /*tp_as_sequence*/
NULL, /*tp_as_mapping*/
(hashfunc)NULL, /*tp_hash*/
(ternaryfunc)NULL, /*tp_call*/
(reprfunc)NULL, /*tp_str*/
NULL, NULL, NULL, (int)NULL,
PgNotify_Type_Doc
};
void initpgnotify(void)
{
PgNotify_Type.ob_type = &PyType_Type;
}
|
