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30fb2c4aba
Let's have some fun. Pull Request resolved: https://github.com/pytorch/pytorch/pull/78828 Approved by: https://github.com/ezyang
37 lines
935 B
C++
37 lines
935 B
C++
#include <torch/csrc/utils/cuda_lazy_init.h>
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#include <torch/csrc/python_headers.h>
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#include <mutex>
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#include <torch/csrc/Exceptions.h>
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#include <torch/csrc/utils/object_ptr.h>
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namespace torch {
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namespace utils {
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static bool run_yet = false;
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void cuda_lazy_init() {
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pybind11::gil_scoped_acquire g;
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// Protected by the GIL. We don't use call_once because under ASAN it
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// has a buggy implementation that deadlocks if an instance throws an
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// exception. In any case, call_once isn't necessary, because we
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// have taken a lock.
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if (!run_yet) {
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auto module = THPObjectPtr(PyImport_ImportModule("torch.cuda"));
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if (!module)
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throw python_error();
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auto res =
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THPObjectPtr(PyObject_CallMethod(module.get(), "_lazy_init", ""));
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if (!res)
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throw python_error();
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run_yet = true;
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}
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}
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void set_run_yet_variable_to_false() {
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run_yet = false;
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}
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} // namespace utils
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} // namespace torch
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