From 252346acd937ddba4845331994b8ff4f90349625 Mon Sep 17 00:00:00 2001 From: Victor Stinner Date: Fri, 1 May 2020 11:33:44 +0200 Subject: bpo-40453: Add PyConfig._isolated_subinterpreter (GH-19820) An isolated subinterpreter cannot spawn threads, spawn a child process or call os.fork(). * Add private _Py_NewInterpreter(isolated_subinterpreter) function. * Add isolated=True keyword-only parameter to _xxsubinterpreters.create(). * Allow again os.fork() in "non-isolated" subinterpreters. --- Python/pylifecycle.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'Python/pylifecycle.c') diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c index 7909cdbf5b..5726a559cf 100644 --- a/Python/pylifecycle.c +++ b/Python/pylifecycle.c @@ -1526,7 +1526,7 @@ Py_Finalize(void) */ static PyStatus -new_interpreter(PyThreadState **tstate_p) +new_interpreter(PyThreadState **tstate_p, int isolated_subinterpreter) { PyStatus status; @@ -1573,6 +1573,7 @@ new_interpreter(PyThreadState **tstate_p) if (_PyStatus_EXCEPTION(status)) { goto error; } + interp->config._isolated_interpreter = isolated_subinterpreter; status = pycore_interp_init(tstate); if (_PyStatus_EXCEPTION(status)) { @@ -1606,10 +1607,10 @@ error: } PyThreadState * -Py_NewInterpreter(void) +_Py_NewInterpreter(int isolated_subinterpreter) { PyThreadState *tstate = NULL; - PyStatus status = new_interpreter(&tstate); + PyStatus status = new_interpreter(&tstate, isolated_subinterpreter); if (_PyStatus_EXCEPTION(status)) { Py_ExitStatusException(status); } @@ -1617,6 +1618,12 @@ Py_NewInterpreter(void) } +PyThreadState * +Py_NewInterpreter(void) +{ + return _Py_NewInterpreter(0); +} + /* Delete an interpreter and its last thread. This requires that the given thread state is current, that the thread has no remaining frames, and that it is its interpreter's only remaining thread. -- cgit v1.2.1