cpython/Modules/_uuidmodule.c at main · python/cpython · GitHub

Name: cpython/Modules/_uuidmodule.c at main · python/cpython · GitHub
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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
#ifndefPy_GIL_DISABLED
# definePy_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

#ifdefMS_WINDOWS
#include<rpc.h>
#endif

#ifndefMS_WINDOWS

staticPyObject*
py_uuid_generate_time_safe(PyObject*Py_UNUSED(context),
PyObject*Py_UNUSED(ignored))
{
uuid_tuuid;
#ifdefHAVE_UUID_GENERATE_TIME_SAFE
intres;

res=uuid_generate_time_safe(uuid);
returnPy_BuildValue("y#i", (constchar*) uuid, sizeof(uuid), res);
#elif defined(HAVE_UUID_CREATE)
uint32_tstatus;
uuid_create(&uuid, &status);
# if defined(HAVE_UUID_ENC_BE)
unsigned charbuf[sizeof(uuid)];
uuid_enc_be(buf, &uuid);
returnPy_BuildValue("y#i", buf, sizeof(uuid), (int) status);
# else
returnPy_BuildValue("y#i", (constchar*) &uuid, sizeof(uuid), (int) status);
# endif/* HAVE_UUID_CREATE */
#else/* HAVE_UUID_GENERATE_TIME_SAFE */
uuid_generate_time(uuid);
returnPy_BuildValue("y#O", (constchar*) uuid, sizeof(uuid), Py_None);
#endif/* HAVE_UUID_GENERATE_TIME_SAFE */
}

#else/* MS_WINDOWS */

staticPyObject*
py_UuidCreate(PyObject*Py_UNUSED(context),
PyObject*Py_UNUSED(ignored))
{
UUIDuuid;
RPC_STATUSres;

Py_BEGIN_ALLOW_THREADS
res=UuidCreateSequential(&uuid);
Py_END_ALLOW_THREADS

switch (res) {
caseRPC_S_OK:
caseRPC_S_UUID_LOCAL_ONLY:
caseRPC_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.
 */
returnPy_BuildValue("y#", (constchar*)&uuid, sizeof(uuid));
 }
PyErr_SetFromWindowsErr(res);
returnNULL;
}

#endif/* MS_WINDOWS */


staticint
uuid_exec(PyObject*module) {
assert(sizeof(uuid_t) ==16);
#if defined(MS_WINDOWS)
inthas_uuid_generate_time_safe=0;
#elif defined(HAVE_UUID_GENERATE_TIME_SAFE)
inthas_uuid_generate_time_safe=1;
#else
inthas_uuid_generate_time_safe=0;
#endif
if (PyModule_AddIntConstant(module, "has_uuid_generate_time_safe",
has_uuid_generate_time_safe) <0) {
return-1;
 }
return0;
}

staticPyMethodDefuuid_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 */
};

staticPyModuleDef_Slotuuid_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}
};

staticstructPyModuleDefuuidmodule= {
PyModuleDef_HEAD_INIT,
 .m_name="_uuid",
 .m_size=0,
 .m_methods=uuid_methods,
 .m_slots=uuid_slots,
};

PyMODINIT_FUNC
PyInit__uuid(void)
{
returnPyModuleDef_Init(&uuidmodule);
}