1#pragma once
2
3// RAII structs to acquire and release Python's global interpreter lock (GIL)
4
5#include <c10/util/Deprecated.h>
6#include <torch/csrc/python_headers.h>
7
8// TODO: Deprecate these structs after we land this diff
9// (to avoid -Werror failures)
10
11// Acquires the GIL on construction
12struct /* C10_DEPRECATED_MESSAGE(
13 "Use pybind11::gil_scoped_acquire instead") */
14 AutoGIL {
15 AutoGIL() : gstate(PyGILState_Ensure()) {}
16 ~AutoGIL() {
17 PyGILState_Release(gstate);
18 }
19
20 PyGILState_STATE gstate;
21};
22
23// Releases the GIL on construction
24struct /* C10_DEPRECATED_MESSAGE(
25 "Use pybind11::gil_scoped_release instead") */
26 AutoNoGIL {
27 AutoNoGIL() : save(PyEval_SaveThread()) {}
28 ~AutoNoGIL() {
29 PyEval_RestoreThread(save);
30 }
31
32 PyThreadState* save;
33};
34
35// Runs the function without the GIL
36template <typename F>
37/* C10_DEPRECATED */ inline void with_no_gil(F f) {
38 // TODO: The deprecation here triggers a deprecated use warning
39 // on some versions of compilers; need to avoid this
40 AutoNoGIL no_gil;
41 f();
42}
43