#pragma once
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#include <c10/core/Allocator.h>
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#include <ATen/core/Generator.h>
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#include <c10/util/Exception.h>
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#include <c10/util/Registry.h>
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#include <cstddef>
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#include <functional>
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#include <memory>
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// Forward-declares THHState
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struct THHState;
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namespace at {
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class Context;
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}
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// NB: Class must live in `at` due to limitations of Registry.h.
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namespace at {
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// The HIPHooksInterface is an omnibus interface for any HIP functionality
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// which we may want to call into from CPU code (and thus must be dynamically
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// dispatched, to allow for separate compilation of HIP code). See
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// CUDAHooksInterface for more detailed motivation.
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struct CAFFE2_API HIPHooksInterface {
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// This should never actually be implemented, but it is used to
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// squelch -Werror=non-virtual-dtor
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virtual ~HIPHooksInterface() {}
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// Initialize THHState and, transitively, the HIP state
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virtual std::unique_ptr<THHState, void (*)(THHState*)> initHIP() const {
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AT_ERROR("Cannot initialize HIP without ATen_hip library.");
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}
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virtual std::unique_ptr<Generator> initHIPGenerator(Context*) const {
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AT_ERROR("Cannot initialize HIP generator without ATen_hip library.");
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}
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virtual bool hasHIP() const {
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return false;
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}
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virtual int64_t current_device() const {
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return -1;
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}
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virtual Allocator* getPinnedMemoryAllocator() const {
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AT_ERROR("Pinned memory requires HIP.");
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}
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virtual void registerHIPTypes(Context*) const {
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AT_ERROR("Cannot registerHIPTypes() without ATen_hip library.");
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}
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virtual int getNumGPUs() const {
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return 0;
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}
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};
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// NB: dummy argument to suppress "ISO C++11 requires at least one argument
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// for the "..." in a variadic macro"
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struct CAFFE2_API HIPHooksArgs {};
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C10_DECLARE_REGISTRY(HIPHooksRegistry, HIPHooksInterface, HIPHooksArgs);
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#define REGISTER_HIP_HOOKS(clsname) \
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C10_REGISTER_CLASS(HIPHooksRegistry, clsname, clsname)
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namespace detail {
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CAFFE2_API const HIPHooksInterface& getHIPHooks();
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} // namespace detail
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} // namespace at
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