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Detect re-initialization of _C shared library #6232

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Merged
ezyang merged 1 commit into from
Apr 3, 2018
Merged

Detect re-initialization of _C shared library #6232

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18 changes: 18 additions & 0 deletions torch/csrc/Module.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -530,6 +530,24 @@ static PyObject* initModule() {
END_HANDLE_TH_ERRORS
}

// Checks that the _C shared library isn't initialized multiple times. This
// can happen if the same csrc files are compiled into multiple shared
// libraries.
inline void pytorch_duplicate_guard() {
static int initialized = 0;
if (initialized) {
fprintf(stderr, "pytorch: _C shared library re-initialized\n");
abort();
}
initialized = 1;
;}

struct call_duplicate_guard {
call_duplicate_guard() { pytorch_duplicate_guard(); }
};

static call_duplicate_guard _call_duplicate_guard;

#if PY_MAJOR_VERSION == 2
PyMODINIT_FUNC init_C()
#else
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