[3.12] gh-105603: Change the PyInterpreterConfig.own gil Field (gh-105620) (gh-105731)

We are changing it to be more flexible that a strict bool can be for possible future expanded used cases.
(cherry picked from commit b97e14a806477af4225777d215ac38c0d9b845f0)

Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>

1 files changed, 15 insertions, 4 deletions

diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index 95b39f4..c4e6b69 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -578,12 +578,14 @@ init_interp_settings(PyInterpreterState *interp,
         interp->feature_flags |= Py_RTFLAGS_MULTI_INTERP_EXTENSIONS;
     }
 
+    /* We check "gil" in init_interp_create_gil(). */
+
     return _PyStatus_OK();
 }
 
 
 static PyStatus
-init_interp_create_gil(PyThreadState *tstate, int own_gil)
+init_interp_create_gil(PyThreadState *tstate, int gil)
 {
     PyStatus status;
 
@@ -598,6 +600,15 @@ init_interp_create_gil(PyThreadState *tstate, int own_gil)
         return status;
     }
 
+    int own_gil;
+    switch (gil) {
+    case PyInterpreterConfig_DEFAULT_GIL: own_gil = 0; break;
+    case PyInterpreterConfig_SHARED_GIL: own_gil = 0; break;
+    case PyInterpreterConfig_OWN_GIL: own_gil = 1; break;
+    default:
+        return _PyStatus_ERR("invalid interpreter config 'gil' value");
+    }
+
     /* Create the GIL and take it */
     status = _PyEval_InitGIL(tstate, own_gil);
     if (_PyStatus_EXCEPTION(status)) {
@@ -633,7 +644,7 @@ pycore_create_interpreter(_PyRuntimeState *runtime,
 
     PyInterpreterConfig config = _PyInterpreterConfig_LEGACY_INIT;
     // The main interpreter always has its own GIL.
-    config.own_gil = 1;
+    config.gil = PyInterpreterConfig_OWN_GIL;
     status = init_interp_settings(interp, &config);
     if (_PyStatus_EXCEPTION(status)) {
         return status;
@@ -647,7 +658,7 @@ pycore_create_interpreter(_PyRuntimeState *runtime,
     // XXX For now we do this before the GIL is created.
     (void) _PyThreadState_SwapNoGIL(tstate);
 
-    status = init_interp_create_gil(tstate, config.own_gil);
+    status = init_interp_create_gil(tstate, config.gil);
     if (_PyStatus_EXCEPTION(status)) {
         return status;
     }
@@ -2057,7 +2068,7 @@ new_interpreter(PyThreadState **tstate_p, const PyInterpreterConfig *config)
         goto error;
     }
 
-    status = init_interp_create_gil(tstate, config->own_gil);
+    status = init_interp_create_gil(tstate, config->gil);
     if (_PyStatus_EXCEPTION(status)) {
         goto error;
     }