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cpython/Modules/_uuidmodule.c at main · python/cpython · GitHub
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Modules
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_uuidmodule.c
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157 lines (137 loc) · 4.05 KB
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cpython
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Modules
/
_uuidmodule.c
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/*
* Python UUID module that wraps libuuid or Windows rpcrt4.dll.
* DCE compatible Universally Unique Identifier library.
*/
// Need limited C API version 3.13 for Py_mod_gil
#include
"pyconfig.h"
// Py_GIL_DISABLED
#ifndef
Py_GIL_DISABLED
# define
Py_LIMITED_API
0x030d0000
#endif
#include
"Python.h"
#if
defined(
HAVE_UUID_H
)
// AIX, FreeBSD, libuuid with pkgconf
#include
<uuid.h>
#elif
defined(
HAVE_UUID_UUID_H
)
// libuuid without pkgconf
#include
<uuid/uuid.h>
#endif
#ifdef
MS_WINDOWS
#include
<rpc.h>
#ifndef
RPC_S_OK
#define
RPC_S_OK
0L
#endif
#endif
#ifndef
MS_WINDOWS
static
PyObject
*
py_uuid_generate_time_safe
(
PyObject
*
Py_UNUSED
(
context
),
PyObject
*
Py_UNUSED
(
ignored
))
{
uuid_t
uuid
;
#ifdef
HAVE_UUID_GENERATE_TIME_SAFE
int
res
;
res
=
uuid_generate_time_safe
(
uuid
);
return
Py_BuildValue
(
"y#i"
, (
const
char
*
)
uuid
,
sizeof
(
uuid
),
res
);
#elif
defined(
HAVE_UUID_CREATE
)
uint32_t
status
;
uuid_create
(
&
uuid
,
&
status
);
# if
defined(
HAVE_UUID_ENC_BE
)
unsigned
char
buf
[
sizeof
(
uuid
)];
uuid_enc_be
(
buf
,
&
uuid
);
return
Py_BuildValue
(
"y#i"
,
buf
,
sizeof
(
uuid
), (
int
)
status
);
# else
return
Py_BuildValue
(
"y#i"
, (
const
char
*
)
&
uuid
,
sizeof
(
uuid
), (
int
)
status
);
# endif
/* HAVE_UUID_CREATE */
#else
/* HAVE_UUID_GENERATE_TIME_SAFE */
uuid_generate_time
(
uuid
);
return
Py_BuildValue
(
"y#O"
, (
const
char
*
)
uuid
,
sizeof
(
uuid
),
Py_None
);
#endif
/* HAVE_UUID_GENERATE_TIME_SAFE */
}
#else
/* MS_WINDOWS */
static
PyObject
*
py_UuidCreate
(
PyObject
*
Py_UNUSED
(
context
),
PyObject
*
Py_UNUSED
(
ignored
))
{
UUID
uuid
;
RPC_STATUS
res
;
Py_BEGIN_ALLOW_THREADS
res
=
UuidCreateSequential
(
&
uuid
);
Py_END_ALLOW_THREADS
switch
(
res
) {
case
RPC_S_OK
:
case
RPC_S_UUID_LOCAL_ONLY
:
case
RPC_S_UUID_NO_ADDRESS
:
/*
All success codes, but the latter two indicate that the UUID is random
rather than based on the MAC address. If the OS can't figure this out,
neither can we, so we'll take it anyway.
*/
return
Py_BuildValue
(
"y#"
, (
const
char
*
)
&
uuid
,
sizeof
(
uuid
));
}
PyErr_SetFromWindowsErr
(
res
);
return
NULL
;
}
static
int
py_windows_has_stable_node
(
void
)
{
UUID
uuid
;
RPC_STATUS
res
;
Py_BEGIN_ALLOW_THREADS
res
=
UuidCreateSequential
(
&
uuid
);
Py_END_ALLOW_THREADS
return
res
==
RPC_S_OK
;
}
#endif
/* MS_WINDOWS */
static
int
uuid_exec
(
PyObject
*
module
)
{
#define
ADD_INT
(
NAME
,
VALUE
) \
do { \
if (PyModule_AddIntConstant(module, (NAME), (VALUE)) < 0) { \
return -1; \
} \
} while (0)
assert
(
sizeof
(
uuid_t
)
==
16
);
#if
defined(
MS_WINDOWS
)
ADD_INT
(
"has_uuid_generate_time_safe"
,
0
);
#elif
defined(
HAVE_UUID_GENERATE_TIME_SAFE
)
ADD_INT
(
"has_uuid_generate_time_safe"
,
1
);
#else
ADD_INT
(
"has_uuid_generate_time_safe"
,
0
);
#endif
#if
defined(
MS_WINDOWS
)
ADD_INT
(
"has_stable_extractable_node"
,
py_windows_has_stable_node
());
#elif
defined(
HAVE_UUID_GENERATE_TIME_SAFE_STABLE_MAC
)
ADD_INT
(
"has_stable_extractable_node"
,
1
);
#else
ADD_INT
(
"has_stable_extractable_node"
,
0
);
#endif
#undef
ADD_INT
return
0
;
}
static
PyMethodDef
uuid_methods
[]
=
{
#if
defined(
HAVE_UUID_UUID_H
)
||
defined(
HAVE_UUID_H
)
{
"generate_time_safe"
,
py_uuid_generate_time_safe
,
METH_NOARGS
,
NULL
},
#endif
#if
defined(
MS_WINDOWS
)
{
"UuidCreate"
,
py_UuidCreate
,
METH_NOARGS
,
NULL
},
#endif
{
NULL
,
NULL
,
0
,
NULL
}
/* sentinel */
};
static
PyModuleDef_Slot
uuid_slots
[]
=
{
{
Py_mod_exec
,
uuid_exec
},
{
Py_mod_multiple_interpreters
,
Py_MOD_PER_INTERPRETER_GIL_SUPPORTED
},
{
Py_mod_gil
,
Py_MOD_GIL_NOT_USED
},
{
0
,
NULL
}
};
static
struct
PyModuleDef
uuidmodule
=
{
PyModuleDef_HEAD_INIT
,
.
m_name
=
"_uuid"
,
.
m_size
=
0
,
.
m_methods
=
uuid_methods
,
.
m_slots
=
uuid_slots
,
};
PyMODINIT_FUNC
PyInit__uuid
(
void
)
{
return
PyModuleDef_Init
(
&
uuidmodule
);
}
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