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/* lobject_int.c - code used by the lobject object
*
* Copyright (C) 2006 Federico Di Gregorio <fog@debian.org>
*
* This file is part of psycopg.
*
* 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 2,
* 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, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <Python.h>
#include <string.h>
#define PSYCOPG_MODULE
#include "psycopg/config.h"
#include "psycopg/psycopg.h"
#include "psycopg/connection.h"
#include "psycopg/lobject.h"
#include "psycopg/pqpath.h"
#ifdef PSYCOPG_EXTENSIONS
int
lobject_open(lobjectObject *self, connectionObject *conn,
Oid oid, int mode, Oid new_oid, char *new_file)
{
Py_BEGIN_ALLOW_THREADS;
pthread_mutex_lock(&(self->conn->lock));
pq_begin(self->conn);
/* if the oid is InvalidOid we create a new lob before opening it
or we import a file from the FS, depending on the value of
new_name */
if (oid == InvalidOid) {
if (new_file)
self->oid = lo_import(self->conn->pgconn, new_file);
else
self->oid = lo_create(self->conn->pgconn, new_oid);
Dprintf("lobject_open: large object created with oid = %d",
self->oid);
if (self->oid == InvalidOid) goto end;
mode = INV_WRITE;
}
else {
self->oid = oid;
if (mode == 0) mode = INV_READ;
}
/* if the oid is a real one we try to open with the given mode */
self->fd = lo_open(self->conn->pgconn, self->oid, mode);
Dprintf("lobject_open: large object opened with fd = %d",
self->fd);
end:
pthread_mutex_unlock(&(self->conn->lock));
Py_END_ALLOW_THREADS;
/* here we check for errors before returning 0 */
if (self->fd == -1 || self->oid == InvalidOid) {
pq_raise(conn, NULL, NULL, NULL);
return -1;
}
else {
return 0;
}
}
#endif
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