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bpo-40513: _xxsubinterpreters.run_string() releases the GIL #19944

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Merged
vstinner merged 1 commit into from
May 5, 2020
Merged

bpo-40513: _xxsubinterpreters.run_string() releases the GIL #19944

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bpo-40513: _xxsubinterpreters.run_string() releases the GIL 
In the experimental isolated subinterpreters build mode,
_xxsubinterpreters.run_string() now releases the GIL.
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@vstinner
vstinner committed May 5, 2020
commit c1a82e59e270abf73242505d585d1ef75ce3d8a1
15 changes: 15 additions & 0 deletions Modules/_xxsubinterpretersmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1939,6 +1939,20 @@ _run_script_in_interpreter(PyInterpreterState *interp, const char *codestr,
return -1;
}

#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
// Switch to interpreter.
PyThreadState *new_tstate = PyInterpreterState_ThreadHead(interp);
PyThreadState *save1 = PyEval_SaveThread();

(void)PyThreadState_Swap(new_tstate);

// Run the script.
_sharedexception *exc = NULL;
int result = _run_script(interp, codestr, shared, &exc);

// Switch back.
PyEval_RestoreThread(save1);
#else
// Switch to interpreter.
PyThreadState *save_tstate = NULL;
if (interp != PyInterpreterState_Get()) {
Expand All @@ -1956,6 +1970,7 @@ _run_script_in_interpreter(PyInterpreterState *interp, const char *codestr,
if (save_tstate != NULL) {
PyThreadState_Swap(save_tstate);
}
#endif

// Propagate any exception out to the caller.
if (exc != NULL) {
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