python 2.7 -> python 3.14

extern/include/python/internal/pycore_gil.h

@@ -0,0 +1,66 @@
+#ifndef Py_INTERNAL_GIL_H
+#define Py_INTERNAL_GIL_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef Py_BUILD_CORE
+#  error "this header requires Py_BUILD_CORE define"
+#endif
+
+#include "pycore_condvar.h"       // PyCOND_T
+
+#ifndef Py_HAVE_CONDVAR
+#  error You need either a POSIX-compatible or a Windows system!
+#endif
+
+/* Enable if you want to force the switching of threads at least
+   every `interval`. */
+#undef FORCE_SWITCHING
+#define FORCE_SWITCHING
+
+struct _gil_runtime_state {
+#ifdef Py_GIL_DISABLED
+    /* If this GIL is disabled, enabled == 0.
+
+       If this GIL is enabled transiently (most likely to initialize a module
+       of unknown safety), enabled indicates the number of active transient
+       requests.
+
+       If this GIL is enabled permanently, enabled == INT_MAX.
+
+       It must not be modified directly; use _PyEval_EnableGILTransiently(),
+       _PyEval_EnableGILPermanently(), and _PyEval_DisableGIL()
+
+       It is always read and written atomically, but a thread can assume its
+       value will be stable as long as that thread is attached or knows that no
+       other threads are attached (e.g., during a stop-the-world.). */
+    int enabled;
+#endif
+    /* microseconds (the Python API uses seconds, though) */
+    unsigned long interval;
+    /* Last PyThreadState holding / having held the GIL. This helps us
+       know whether anyone else was scheduled after we dropped the GIL. */
+    PyThreadState* last_holder;
+    /* Whether the GIL is already taken (-1 if uninitialized). This is
+       atomic because it can be read without any lock taken in ceval.c. */
+    int locked;
+    /* Number of GIL switches since the beginning. */
+    unsigned long switch_number;
+    /* This condition variable allows one or several threads to wait
+       until the GIL is released. In addition, the mutex also protects
+       the above variables. */
+    PyCOND_T cond;
+    PyMUTEX_T mutex;
+#ifdef FORCE_SWITCHING
+    /* This condition variable helps the GIL-releasing thread wait for
+       a GIL-awaiting thread to be scheduled and take the GIL. */
+    PyCOND_T switch_cond;
+    PyMUTEX_T switch_mutex;
+#endif
+};
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_INTERNAL_GIL_H */