psycopg/psycopg2
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implement sequence behaviour, as required for transaction IDs.

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By James Henstridge on 2008-07-24.

Merged from lp:~jamesh/psycopg/two-phase-commit/revision/357
This commit is contained in:
Daniele Varrazzo 2010-10-06 01:25:14 +01:00
parent 0021e56d80
commit 22aea9114b
3 changed files with 49 additions and 1 deletions
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5
ChangeLog
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@ -12,6 +12,11 @@
* Merged James Henstridge work on two-phase commit support.
2008-07-24 James Henstridge <james@jamesh.id.au>
* psycopg/xid_type.c (xid_len, xid_getitem): implement sequence
behaviour, as required for transaction IDs.
2008-07-23 James Henstridge <james@jamesh.id.au>
* psycopg/connection_type.c (psyco_conn_xid): add a

2
psycopg/python.h
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@ -41,6 +41,8 @@
#define PY_FORMAT_SIZE_T ""
#define PyInt_FromSsize_t(x) PyInt_FromLong((x))
#define lenfunc inquiry
#define ssizeargfunc intargfunc
#define readbufferproc getreadbufferproc
#define writebufferproc getwritebufferproc
#define segcountproc getsegcountproc

43
psycopg/xid_type.c
View File

@ -184,6 +184,47 @@ xid_repr(XidObject *self)
self->pg_xact_id ? self->pg_xact_id : "(null)");
}
static Py_ssize_t
xid_len(XidObject *self)
{
return 3;
}
static PyObject *
xid_getitem(XidObject *self, Py_ssize_t item)
{
if (item < 0)
item += 3;
switch (item) {
case 0:
Py_INCREF(self->format_id);
return self->format_id;
case 1:
Py_INCREF(self->gtrid);
return self->gtrid;
case 2:
Py_INCREF(self->bqual);
return self->bqual;
default:
PyErr_SetString(PyExc_IndexError, "index out of range");
return NULL;
}
}
static PySequenceMethods xid_sequence = {
(lenfunc)xid_len, /* sq_length */
0, /* sq_concat */
0, /* sq_repeat */
(ssizeargfunc)xid_getitem, /* sq_item */
0, /* sq_slice */
0, /* sq_ass_item */
0, /* sq_ass_slice */
0, /* sq_contains */
0, /* sq_inplace_concat */
0, /* sq_inplace_repeat */
};
static const char xid_doc[] =
"A transaction identifier used for two phase commit.";
@ -203,7 +244,7 @@ PyTypeObject XidType = {
(reprfunc)xid_repr, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
&xid_sequence, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */