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https://github.com/python/cpython.git
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Jelle Zijlstra
656af533dc
A cursor exposed its description tuple before filling in all the columns, so an allocation failure or a reader on a free-threaded build could encounter an unset tuple entry. An allocation failure could also clear lastrowid and crash the next execute. Build new metadata before replacing the old values and synchronize reads and writes. Keep a strong reference to each row or text factory while it is called so replacing the factory during a fetch cannot destroy an active callable.
65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/* util.h - various utility functions
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*
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* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
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*
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* This file is part of pysqlite.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef PYSQLITE_UTIL_H
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#define PYSQLITE_UTIL_H
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#include "Python.h"
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#include "pycore_pyatomic_ft_wrappers.h" // FT_ATOMIC_STORE_PTR_RELEASE()
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#include "pythread.h"
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#include "sqlite3.h"
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#include "connection.h"
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/**
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* Checks the SQLite error code and sets the appropriate DB-API exception.
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*/
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int set_error_from_db(pysqlite_state *state, sqlite3 *db);
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void set_error_from_code(pysqlite_state *state, int code);
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sqlite_int64 _pysqlite_long_as_int64(PyObject * value);
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/* Take a strong reference while the owning object's lock is held. */
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static inline PyObject *
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pysqlite_get_ref(PyObject *owner, PyObject *const *field, PyObject *fallback)
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{
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PyObject *value;
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Py_BEGIN_CRITICAL_SECTION(owner);
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value = Py_NewRef(*field != NULL ? *field : fallback);
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Py_END_CRITICAL_SECTION();
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return value;
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}
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/* Steal value. Use the same store as PyMember_SetOne() since a readonly
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* member descriptor may load the field without taking the object's lock. */
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static inline void
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pysqlite_set_ref(PyObject *owner, PyObject **field, PyObject *value)
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{
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PyObject *old;
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Py_BEGIN_CRITICAL_SECTION(owner);
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old = *field;
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FT_ATOMIC_STORE_PTR_RELEASE(*field, value);
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Py_END_CRITICAL_SECTION();
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Py_XDECREF(old);
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}
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#endif
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