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4a019047ad
It is time to enable nested namespaces in the code. Pull Request resolved: https://github.com/pytorch/pytorch/pull/118506 Approved by: https://github.com/albanD
29 lines
864 B
C++
29 lines
864 B
C++
#pragma once
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#include <c10/core/impl/PyInterpreter.h>
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namespace c10::impl {
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struct C10_API GPUTrace {
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// On the x86 architecture the atomic operations are lock-less.
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static std::atomic<const PyInterpreter*> gpuTraceState;
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// When PyTorch migrates to C++20, this should be changed to an atomic flag.
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// Currently, the access to this variable is not synchronized, on the basis
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// that it will only be flipped once and by the first interpreter that
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// accesses it.
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static bool haveState;
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// This function will only register the first interpreter that tries to invoke
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// it. For all of the next ones it will be a no-op.
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static void set_trace(const PyInterpreter*);
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static const PyInterpreter* get_trace() {
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if (!haveState)
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return nullptr;
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return gpuTraceState.load(std::memory_order_acquire);
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}
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};
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} // namespace c10::impl
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