27 lines
927 B
C++
27 lines
927 B
C++
#pragma once
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#include <c10/core/impl/LocalDispatchKeySet.h>
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namespace at::impl {
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// VmapMode contains a thread local count of how many nested vmaps
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// we are currently inside. That number is known as the `vmap level`.
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// VmapMode is used in the implementation of the Python `torch.vmap` API.
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//
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// NOTE: this is NOT the c++ api for torch.vmap. That doesn't exist yet.
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struct TORCH_API VmapMode {
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// Returns the vmap level, aka the count of how many nested vmaps we're in.
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static int64_t current_vmap_level();
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// Increment the count of nested vmaps. If this causes the vmap level to be
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// greater than 0, then it enables DispatchKey::VmapMode on all tensors.
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static int64_t increment_nesting();
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// Decrements the count of nested vmaps. If this causes the vmap level to be
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// equal to 0, then it disables DispatchKey::VmapMode on all tensors.
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static int64_t decrement_nesting();
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};
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} // namespace at::impl
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