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/* PyInterpreterConfig API */
#include "Python.h"
#include "pycore_pylifecycle.h"
#include <stdbool.h>
#include "config_common.h"
static const char *
gil_flag_to_str(int flag)
{
switch (flag) {
case PyInterpreterConfig_DEFAULT_GIL:
return "default";
case PyInterpreterConfig_SHARED_GIL:
return "shared";
case PyInterpreterConfig_OWN_GIL:
return "own";
default:
PyErr_SetString(PyExc_SystemError,
"invalid interpreter config 'gil' value");
return NULL;
}
}
static int
gil_flag_from_str(const char *str, int *p_flag)
{
int flag;
if (str == NULL) {
flag = PyInterpreterConfig_DEFAULT_GIL;
}
else if (strcmp(str, "default") == 0) {
flag = PyInterpreterConfig_DEFAULT_GIL;
}
else if (strcmp(str, "shared") == 0) {
flag = PyInterpreterConfig_SHARED_GIL;
}
else if (strcmp(str, "own") == 0) {
flag = PyInterpreterConfig_OWN_GIL;
}
else {
PyErr_Format(PyExc_ValueError,
"unsupported interpreter config .gil value '%s'", str);
return -1;
}
*p_flag = flag;
return 0;
}
PyObject *
_PyInterpreterConfig_AsDict(PyInterpreterConfig *config)
{
PyObject *dict = PyDict_New();
if (dict == NULL) {
return NULL;
}
#define ADD(NAME, OBJ) \
do { \
int res = PyDict_SetItemString(dict, NAME, (OBJ)); \
Py_DECREF(OBJ); \
if (res < 0) { \
goto error; \
} \
} while (0)
#define ADD_BOOL(FIELD) \
ADD(#FIELD, Py_NewRef(config->FIELD ? Py_True : Py_False))
#define ADD_STR(FIELD, STR) \
do { \
if (STR == NULL) { \
goto error; \
} \
PyObject *obj = PyUnicode_FromString(STR); \
if (obj == NULL) { \
goto error; \
} \
ADD(#FIELD, obj); \
} while (0)
ADD_BOOL(use_main_obmalloc);
ADD_BOOL(allow_fork);
ADD_BOOL(allow_exec);
ADD_BOOL(allow_threads);
ADD_BOOL(allow_daemon_threads);
ADD_BOOL(check_multi_interp_extensions);
ADD_STR(gil, gil_flag_to_str(config->gil));
#undef ADD_STR
#undef ADD_BOOL
#undef ADD
return dict;
error:
Py_DECREF(dict);
return NULL;
}
static int
_config_dict_get_bool(PyObject *dict, const char *name, int *p_flag)
{
PyObject *item;
if (_config_dict_get(dict, name, &item) < 0) {
return -1;
}
// For now we keep things strict, rather than using PyObject_IsTrue().
int flag = item == Py_True;
if (!flag && item != Py_False) {
Py_DECREF(item);
config_dict_invalid_type(name);
return -1;
}
Py_DECREF(item);
*p_flag = flag;
return 0;
}
static int
_config_dict_copy_str(PyObject *dict, const char *name,
char *buf, size_t bufsize)
{
PyObject *item;
if (_config_dict_get(dict, name, &item) < 0) {
return -1;
}
if (!PyUnicode_Check(item)) {
Py_DECREF(item);
config_dict_invalid_type(name);
return -1;
}
strncpy(buf, PyUnicode_AsUTF8(item), bufsize-1);
buf[bufsize-1] = '\0';
Py_DECREF(item);
return 0;
}
static int
interp_config_from_dict(PyObject *origdict, PyInterpreterConfig *config,
bool missing_allowed)
{
PyObject *dict = PyDict_New();
if (dict == NULL) {
return -1;
}
if (PyDict_Update(dict, origdict) < 0) {
goto error;
}
#define CHECK(NAME) \
do { \
if (PyErr_Occurred()) { \
goto error; \
} \
else { \
if (!missing_allowed) { \
(void)config_dict_get(dict, NAME); \
assert(PyErr_Occurred()); \
goto error; \
} \
} \
} while (0)
#define COPY_BOOL(FIELD) \
do { \
int flag; \
if (_config_dict_get_bool(dict, #FIELD, &flag) < 0) { \
CHECK(#FIELD); \
} \
else { \
config->FIELD = flag; \
(void)PyDict_PopString(dict, #FIELD, NULL); \
} \
} while (0)
COPY_BOOL(use_main_obmalloc);
COPY_BOOL(allow_fork);
COPY_BOOL(allow_exec);
COPY_BOOL(allow_threads);
COPY_BOOL(allow_daemon_threads);
COPY_BOOL(check_multi_interp_extensions);
// PyInterpreterConfig.gil
char buf[20];
if (_config_dict_copy_str(dict, "gil", buf, 20) < 0) {
CHECK("gil");
}
else {
int flag;
if (gil_flag_from_str(buf, &flag) < 0) {
goto error;
}
config->gil = flag;
(void)PyDict_PopString(dict, "gil", NULL);
}
#undef COPY_BOOL
#undef CHECK
Py_ssize_t unused = PyDict_GET_SIZE(dict);
if (unused == 1) {
PyErr_Format(PyExc_ValueError,
"config dict has 1 extra item (%R)", dict);
goto error;
}
else if (unused > 0) {
PyErr_Format(PyExc_ValueError,
"config dict has %d extra items (%R)", unused, dict);
goto error;
}
Py_DECREF(dict);
return 0;
error:
Py_DECREF(dict);
return -1;
}
int
_PyInterpreterConfig_InitFromDict(PyInterpreterConfig *config, PyObject *dict)
{
if (!PyDict_Check(dict)) {
PyErr_SetString(PyExc_TypeError, "dict expected");
return -1;
}
if (interp_config_from_dict(dict, config, false) < 0) {
return -1;
}
return 0;
}
int
_PyInterpreterConfig_UpdateFromDict(PyInterpreterConfig *config, PyObject *dict)
{
if (!PyDict_Check(dict)) {
PyErr_SetString(PyExc_TypeError, "dict expected");
return -1;
}
if (interp_config_from_dict(dict, config, true) < 0) {
return -1;
}
return 0;
}
int
_PyInterpreterConfig_InitFromState(PyInterpreterConfig *config,
PyInterpreterState *interp)
{
// Populate the config by re-constructing the values from the interpreter.
*config = (PyInterpreterConfig){
#define FLAG(flag) \
(interp->feature_flags & Py_RTFLAGS_ ## flag)
.use_main_obmalloc = FLAG(USE_MAIN_OBMALLOC),
.allow_fork = FLAG(FORK),
.allow_exec = FLAG(EXEC),
.allow_threads = FLAG(THREADS),
.allow_daemon_threads = FLAG(DAEMON_THREADS),
.check_multi_interp_extensions = FLAG(MULTI_INTERP_EXTENSIONS),
#undef FLAG
.gil = interp->ceval.own_gil
? PyInterpreterConfig_OWN_GIL
: PyInterpreterConfig_SHARED_GIL,
};
return 0;
}
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