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#pragma once
#include <c10/util/intrusive_ptr.h>
#include <torch/csrc/distributed/c10d/ProcessGroup.hpp>
namespace c10d {
namespace ops {
// Below are essentially ProcessGroup's corresponding ops but routed to the
// dispatcher. To be noted, it's a convention to use at::TensorList to represent
// const std::vector<at::Tensor>&. However, const std::vector<at::Tensor>& is
// used whenever the API accepts std::vector<std::vector<at::Tensor>>& to keep
// consistency.
TORCH_API c10::intrusive_ptr<Work> broadcast(
const c10::intrusive_ptr<ProcessGroup>& process_group,
at::TensorList tensors,
const BroadcastOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> allreduce(
const c10::intrusive_ptr<ProcessGroup>& process_group,
at::TensorList tensors,
const AllreduceOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> allgather(
const c10::intrusive_ptr<ProcessGroup>& process_group,
const std::vector<std::vector<at::Tensor>>& output_tensors,
const std::vector<at::Tensor>& input_tensors,
const AllgatherOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> reduce_scatter(
const c10::intrusive_ptr<ProcessGroup>& process_group,
const std::vector<at::Tensor>& output_tensors,
const std::vector<std::vector<at::Tensor>>& input_tensors,
const ReduceScatterOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> reduce(
const c10::intrusive_ptr<ProcessGroup>& process_group,
at::TensorList tensors,
const ReduceOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> gather(
const c10::intrusive_ptr<ProcessGroup>& process_group,
const std::vector<std::vector<at::Tensor>>& output_tensors,
const std::vector<at::Tensor>& input_tensors,
const GatherOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> scatter(
const c10::intrusive_ptr<ProcessGroup>& process_group,
const std::vector<at::Tensor>& output_tensors,
const std::vector<std::vector<at::Tensor>>& input_tensors,
const ScatterOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> alltoall(
const c10::intrusive_ptr<ProcessGroup>& process_group,
at::TensorList output_tensors,
at::TensorList input_tensors,
const AllToAllOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> barrier(
const c10::intrusive_ptr<ProcessGroup>& process_group,
const BarrierOptions& opts = {});
TORCH_API c10::intrusive_ptr<Work> send(
const c10::intrusive_ptr<ProcessGroup>& process_group,
at::TensorList tensors,
int64_t dstRank,
int64_t tag);
TORCH_API c10::intrusive_ptr<Work> recv(
const c10::intrusive_ptr<ProcessGroup>& process_group,
at::TensorList tensors,
int64_t srcRank,
int64_t tag);
} // namespace ops
} // namespace c10d
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