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patch 8.2.1834: PyEval_InitThreads() is deprecated in Python 3.9

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Problem:    PyEval_InitThreads() is deprecated in Python 3.9.
Solution:   Do not call PyEval_InitThreads in Python 3.9 and later. (Ken
            Takata, closes #7113)  Avoid warnings for functions.
This commit is contained in:
Bram Moolenaar
2020-10-11 18:05:02 +02:00
parent 204ade6bcb
commit efc0d94afc
3 changed files with 17 additions and 14 deletions
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21
src/if_python3.c
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@@ -1002,11 +1002,10 @@ Python3_Init(void)
reset_stdin();
Py_Initialize();
// Initialise threads, and below save the state using
// PyEval_SaveThread. Without the call to PyEval_SaveThread, thread
// specific state (such as the system trace hook), will be lost
// between invocations of Python code.
#if PY_VERSION_HEX < 0x03090000
// Initialise threads. This is deprecated since Python 3.9.
PyEval_InitThreads();
#endif
#ifdef DYNAMIC_PYTHON3
get_py3_exceptions();
#endif
@@ -1024,12 +1023,14 @@ Python3_Init(void)
// sys.path.
PyRun_SimpleString("import vim; import sys; sys.path = list(filter(lambda x: not x.endswith('must>not&exist'), sys.path))");
// lock is created and acquired in PyEval_InitThreads() and thread
// state is created in Py_Initialize()
// there _PyGILState_NoteThreadState() also sets gilcounter to 1
// (python must have threads enabled!)
// so the following does both: unlock GIL and save thread state in TLS
// without deleting thread state
// Without the call to PyEval_SaveThread, thread specific state (such
// as the system trace hook), will be lost between invocations of
// Python code.
// GIL may have been created and acquired in PyEval_InitThreads() and
// thread state is created in Py_Initialize(); there
// _PyGILState_NoteThreadState() also sets gilcounter to 1 (python must
// have threads enabled!), so the following does both: unlock GIL and
// save thread state in TLS without deleting thread state
PyEval_SaveThread();
py3initialised = 1;