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Initialize Python function-local statics (singletons)

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Singletons are created during Python module initialization in order to avoid
deadlocks with subsequent multi-threaded usage.
Fixes #1275 #1279
This commit is contained in:
William S Fulton 2018-07-17 19:56:12 +01:00
commit d56d7a7253
2 changed files with 16 additions and 0 deletions
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11
Lib/python/pyinit.swg
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@ -379,6 +379,17 @@ SWIG_init(void) {
assert(metatype);
#endif
/* Create singletons now to avoid potential deadlocks with multi-threaded usage after module initialization */
#ifdef SWIG_PYTHON_BUILD_NONE
SWIG_Py_None();
#endif
SWIG_This();
SWIG_Python_TypeCache();
SwigPyPacked_type();
#ifndef SWIGPYTHON_BUILTIN
SwigPyObject_type();
#endif
/* Fix SwigMethods to carry the callback ptrs when needed */
SWIG_Python_FixMethods(SwigMethods, swig_const_table, swig_types, swig_type_initial);