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Refactor PyImport_ImportModuleLevelObject(). (#4680) 

Add import_find_and_load() helper function.  The addition of
the importtime option has made PyImport_ImportModuleLevelObject() large
and so using a helper seems worthwhile.  It also makes it clearer that
abs_name is the only argument needed by _find_and_load().
This commit is contained in:
Neil Schemenauer 2017-12-03 09:26:03 -08:00 committed by GitHub
parent 078f1814f1
commit eea3cc1ef0
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 57 additions and 50 deletions
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107
Python/import.c
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@ -1589,12 +1589,67 @@ resolve_name(PyObject *name, PyObject *globals, int level)
return NULL;
}
static PyObject *
import_find_and_load(PyObject *abs_name)
{
_Py_IDENTIFIER(_find_and_load);
PyObject *mod = NULL;
PyInterpreterState *interp = PyThreadState_GET()->interp;
int import_time = interp->core_config.import_time;
static int import_level;
static _PyTime_t accumulated;
_PyTime_t t1 = 0, accumulated_copy = accumulated;
/* XOptions is initialized after first some imports.
* So we can't have negative cache before completed initialization.
* Anyway, importlib._find_and_load is much slower than
* _PyDict_GetItemIdWithError().
*/
if (import_time) {
static int header = 1;
if (header) {
fputs("import time: self [us] | cumulative | imported package\n",
stderr);
header = 0;
}
import_level++;
t1 = _PyTime_GetPerfCounter();
accumulated = 0;
}
if (PyDTrace_IMPORT_FIND_LOAD_START_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_START(PyUnicode_AsUTF8(abs_name));
mod = _PyObject_CallMethodIdObjArgs(interp->importlib,
&PyId__find_and_load, abs_name,
interp->import_func, NULL);
if (PyDTrace_IMPORT_FIND_LOAD_DONE_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_DONE(PyUnicode_AsUTF8(abs_name),
mod != NULL);
if (import_time) {
_PyTime_t cum = _PyTime_GetPerfCounter() - t1;
import_level--;
fprintf(stderr, "import time: %9ld | %10ld | %*s%s\n",
(long)_PyTime_AsMicroseconds(cum - accumulated, _PyTime_ROUND_CEILING),
(long)_PyTime_AsMicroseconds(cum, _PyTime_ROUND_CEILING),
import_level*2, "", PyUnicode_AsUTF8(abs_name));
accumulated = accumulated_copy + cum;
}
return mod;
}
PyObject *
PyImport_ImportModuleLevelObject(PyObject *name, PyObject *globals,
PyObject *locals, PyObject *fromlist,
int level)
{
_Py_IDENTIFIER(_find_and_load);
_Py_IDENTIFIER(_handle_fromlist);
PyObject *abs_name = NULL;
PyObject *final_mod = NULL;
@ -1674,55 +1729,7 @@ PyImport_ImportModuleLevelObject(PyObject *name, PyObject *globals,
}
}
else {
int import_time = interp->core_config.import_time;
static int import_level;
static _PyTime_t accumulated;
_PyTime_t t1 = 0, accumulated_copy = accumulated;
/* XOptions is initialized after first some imports.
* So we can't have negative cache before completed initialization.
* Anyway, importlib._find_and_load is much slower than
* _PyDict_GetItemIdWithError().
*/
if (import_time) {
static int header = 1;
if (header) {
fputs("import time: self [us] | cumulative | imported package\n",
stderr);
header = 0;
}
import_level++;
t1 = _PyTime_GetPerfCounter();
accumulated = 0;
}
Py_XDECREF(mod);
if (PyDTrace_IMPORT_FIND_LOAD_START_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_START(PyUnicode_AsUTF8(abs_name));
mod = _PyObject_CallMethodIdObjArgs(interp->importlib,
&PyId__find_and_load, abs_name,
interp->import_func, NULL);
if (PyDTrace_IMPORT_FIND_LOAD_DONE_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_DONE(PyUnicode_AsUTF8(abs_name),
mod != NULL);
if (import_time) {
_PyTime_t cum = _PyTime_GetPerfCounter() - t1;
import_level--;
fprintf(stderr, "import time: %9ld | %10ld | %*s%s\n",
(long)_PyTime_AsMicroseconds(cum - accumulated, _PyTime_ROUND_CEILING),
(long)_PyTime_AsMicroseconds(cum, _PyTime_ROUND_CEILING),
import_level*2, "", PyUnicode_AsUTF8(abs_name));
accumulated = accumulated_copy + cum;
}
mod = import_find_and_load(abs_name);
if (mod == NULL) {
goto error;
}