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project_6_89d52222/cccl_upstream/thrust/thrust/detail/partition.inl
EngineX CI 56fd68e7dd [INFRA] Import NVIDIA/CCCL upstream as optimization reference library 
CCCL (CUDA C++ Core Libraries) provides:
- CUB: device/block/warp-level GPU primitives (reduce, scan, sort, topk)
- Thrust: high-level parallel algorithms (transform_reduce, sort, scan)
- libcudacxx: CUDA C++ standard library (atomics, barriers, memory)
- cudax: experimental features (memory resources, allocators)
- Tuning policies: per-SM hardware-specific algorithm parameters

Competition optimization vectors mapped to CCCL:
- Output TPS (83% weight): warp_reduce, block_reduce, device_topk
- Input TPS (14% weight): device_scan, block_load, prefetch
- Cache TPS (3% weight): prefix caching strategy patterns
- Memory (0.9 util): pooled/cached/buddy allocators

Source: https://github.com/NVIDIA/cccl (shallow clone, HEAD only)
License: Apache-2.0
2026-07-30 09:35:51 +00:00

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// SPDX-FileCopyrightText: Copyright (c) 2008-2013, NVIDIA Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <thrust/detail/config.h>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#include <thrust/iterator/iterator_traits.h>
#include <thrust/partition.h>
#include <thrust/system/detail/generic/select_system.h>
// Include all active backend system implementations (generic, sequential, host and device)
#include <thrust/system/detail/generic/partition.h>
#include <thrust/system/detail/sequential/partition.h>
#include __THRUST_HOST_SYSTEM_ALGORITH_DETAIL_HEADER_INCLUDE(partition.h)
#include __THRUST_DEVICE_SYSTEM_ALGORITH_DETAIL_HEADER_INCLUDE(partition.h)
// Some build systems need a hint to know which files we could include
#if 0
# include <thrust/system/cpp/detail/partition.h>
# include <thrust/system/cuda/detail/partition.h>
# include <thrust/system/omp/detail/partition.h>
# include <thrust/system/tbb/detail/partition.h>
#endif
THRUST_NAMESPACE_BEGIN
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy, typename ForwardIterator, typename Predicate>
_CCCL_HOST_DEVICE ForwardIterator partition(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
ForwardIterator first,
ForwardIterator last,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition");
using thrust::system::detail::generic::partition;
return partition(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, pred);
} // end partition()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy, typename ForwardIterator, typename InputIterator, typename Predicate>
_CCCL_HOST_DEVICE ForwardIterator partition(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
ForwardIterator first,
ForwardIterator last,
InputIterator stencil,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition");
using thrust::system::detail::generic::partition;
return partition(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, stencil, pred);
} // end partition()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy,
typename InputIterator,
typename OutputIterator1,
typename OutputIterator2,
typename Predicate>
_CCCL_HOST_DEVICE ::cuda::std::pair<OutputIterator1, OutputIterator2> partition_copy(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
InputIterator first,
InputIterator last,
OutputIterator1 out_true,
OutputIterator2 out_false,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition_copy");
using thrust::system::detail::generic::partition_copy;
return partition_copy(
thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, out_true, out_false, pred);
} // end partition_copy()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy,
typename InputIterator1,
typename InputIterator2,
typename OutputIterator1,
typename OutputIterator2,
typename Predicate>
_CCCL_HOST_DEVICE ::cuda::std::pair<OutputIterator1, OutputIterator2> partition_copy(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
InputIterator1 first,
InputIterator1 last,
InputIterator2 stencil,
OutputIterator1 out_true,
OutputIterator2 out_false,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition_copy");
using thrust::system::detail::generic::partition_copy;
return partition_copy(
thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, stencil, out_true, out_false, pred);
} // end partition_copy()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy, typename ForwardIterator, typename Predicate>
_CCCL_HOST_DEVICE ForwardIterator stable_partition(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
ForwardIterator first,
ForwardIterator last,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition");
using thrust::system::detail::generic::stable_partition;
return stable_partition(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, pred);
} // end stable_partition()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy, typename ForwardIterator, typename InputIterator, typename Predicate>
_CCCL_HOST_DEVICE ForwardIterator stable_partition(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
ForwardIterator first,
ForwardIterator last,
InputIterator stencil,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition");
using thrust::system::detail::generic::stable_partition;
return stable_partition(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, stencil, pred);
} // end stable_partition()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy,
typename InputIterator,
typename OutputIterator1,
typename OutputIterator2,
typename Predicate>
_CCCL_HOST_DEVICE ::cuda::std::pair<OutputIterator1, OutputIterator2> stable_partition_copy(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
InputIterator first,
InputIterator last,
OutputIterator1 out_true,
OutputIterator2 out_false,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition_copy");
using thrust::system::detail::generic::stable_partition_copy;
return stable_partition_copy(
thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, out_true, out_false, pred);
} // end stable_partition_copy()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy,
typename InputIterator1,
typename InputIterator2,
typename OutputIterator1,
typename OutputIterator2,
typename Predicate>
_CCCL_HOST_DEVICE ::cuda::std::pair<OutputIterator1, OutputIterator2> stable_partition_copy(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
InputIterator1 first,
InputIterator1 last,
InputIterator2 stencil,
OutputIterator1 out_true,
OutputIterator2 out_false,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition_copy");
using thrust::system::detail::generic::stable_partition_copy;
return stable_partition_copy(
thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, stencil, out_true, out_false, pred);
} // end stable_partition_copy()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy, typename ForwardIterator, typename Predicate>
_CCCL_HOST_DEVICE ForwardIterator partition_point(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
ForwardIterator first,
ForwardIterator last,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition_point");
using thrust::system::detail::generic::partition_point;
return partition_point(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, pred);
} // end partition_point()
_CCCL_EXEC_CHECK_DISABLE
template <typename DerivedPolicy, typename InputIterator, typename Predicate>
_CCCL_HOST_DEVICE bool is_partitioned(
const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
InputIterator first,
InputIterator last,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::is_partitioned");
using thrust::system::detail::generic::is_partitioned;
return is_partitioned(thrust::detail::derived_cast(thrust::detail::strip_const(exec)), first, last, pred);
} // end is_partitioned()
template <typename ForwardIterator, typename Predicate>
ForwardIterator partition(ForwardIterator first, ForwardIterator last, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition");
using thrust::system::detail::generic::select_system;
using System = typename thrust::iterator_system<ForwardIterator>::type;
System system;
return thrust::partition(select_system(system), first, last, pred);
} // end partition()
template <typename ForwardIterator, typename InputIterator, typename Predicate>
ForwardIterator partition(ForwardIterator first, ForwardIterator last, InputIterator stencil, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition");
using thrust::system::detail::generic::select_system;
using System1 = typename thrust::iterator_system<ForwardIterator>::type;
using System2 = typename thrust::iterator_system<InputIterator>::type;
System1 system1;
System2 system2;
return thrust::partition(select_system(system1, system2), first, last, stencil, pred);
} // end partition()
template <typename ForwardIterator, typename Predicate>
ForwardIterator stable_partition(ForwardIterator first, ForwardIterator last, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition");
using thrust::system::detail::generic::select_system;
using System = typename thrust::iterator_system<ForwardIterator>::type;
System system;
return thrust::stable_partition(select_system(system), first, last, pred);
} // end stable_partition()
template <typename ForwardIterator, typename InputIterator, typename Predicate>
ForwardIterator stable_partition(ForwardIterator first, ForwardIterator last, InputIterator stencil, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition");
using thrust::system::detail::generic::select_system;
using System1 = typename thrust::iterator_system<ForwardIterator>::type;
using System2 = typename thrust::iterator_system<InputIterator>::type;
System1 system1;
System2 system2;
return thrust::stable_partition(select_system(system1, system2), first, last, stencil, pred);
} // end stable_partition()
template <typename InputIterator, typename OutputIterator1, typename OutputIterator2, typename Predicate>
::cuda::std::pair<OutputIterator1, OutputIterator2> partition_copy(
InputIterator first, InputIterator last, OutputIterator1 out_true, OutputIterator2 out_false, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition_copy");
using thrust::system::detail::generic::select_system;
using System1 = typename thrust::iterator_system<InputIterator>::type;
using System2 = typename thrust::iterator_system<OutputIterator1>::type;
using System3 = typename thrust::iterator_system<OutputIterator2>::type;
System1 system1;
System2 system2;
System3 system3;
return thrust::partition_copy(select_system(system1, system2, system3), first, last, out_true, out_false, pred);
} // end partition_copy()
template <typename InputIterator1,
typename InputIterator2,
typename OutputIterator1,
typename OutputIterator2,
typename Predicate>
::cuda::std::pair<OutputIterator1, OutputIterator2> partition_copy(
InputIterator1 first,
InputIterator1 last,
InputIterator2 stencil,
OutputIterator1 out_true,
OutputIterator2 out_false,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition_copy");
using thrust::system::detail::generic::select_system;
using System1 = typename thrust::iterator_system<InputIterator1>::type;
using System2 = typename thrust::iterator_system<InputIterator1>::type;
using System3 = typename thrust::iterator_system<OutputIterator1>::type;
using System4 = typename thrust::iterator_system<OutputIterator2>::type;
System1 system1;
System2 system2;
System3 system3;
System4 system4;
return thrust::partition_copy(
select_system(system1, system2, system3, system4), first, last, stencil, out_true, out_false, pred);
} // end partition_copy()
template <typename InputIterator, typename OutputIterator1, typename OutputIterator2, typename Predicate>
::cuda::std::pair<OutputIterator1, OutputIterator2> stable_partition_copy(
InputIterator first, InputIterator last, OutputIterator1 out_true, OutputIterator2 out_false, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition_copy");
using thrust::system::detail::generic::select_system;
using System1 = typename thrust::iterator_system<InputIterator>::type;
using System2 = typename thrust::iterator_system<OutputIterator1>::type;
using System3 = typename thrust::iterator_system<OutputIterator2>::type;
System1 system1;
System2 system2;
System3 system3;
return thrust::stable_partition_copy(select_system(system1, system2, system3), first, last, out_true, out_false, pred);
} // end stable_partition_copy()
template <typename InputIterator1,
typename InputIterator2,
typename OutputIterator1,
typename OutputIterator2,
typename Predicate>
::cuda::std::pair<OutputIterator1, OutputIterator2> stable_partition_copy(
InputIterator1 first,
InputIterator1 last,
InputIterator2 stencil,
OutputIterator1 out_true,
OutputIterator2 out_false,
Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::stable_partition_copy");
using thrust::system::detail::generic::select_system;
using System1 = typename thrust::iterator_system<InputIterator1>::type;
using System2 = typename thrust::iterator_system<InputIterator2>::type;
using System3 = typename thrust::iterator_system<OutputIterator1>::type;
using System4 = typename thrust::iterator_system<OutputIterator2>::type;
System1 system1;
System2 system2;
System3 system3;
System4 system4;
return thrust::stable_partition_copy(
select_system(system1, system2, system3, system4), first, last, stencil, out_true, out_false, pred);
} // end stable_partition_copy()
template <typename ForwardIterator, typename Predicate>
ForwardIterator partition_point(ForwardIterator first, ForwardIterator last, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::partition_point");
using thrust::system::detail::generic::select_system;
using System = typename thrust::iterator_system<ForwardIterator>::type;
System system;
return thrust::partition_point(select_system(system), first, last, pred);
} // end partition_point()
template <typename InputIterator, typename Predicate>
bool is_partitioned(InputIterator first, InputIterator last, Predicate pred)
{
_CCCL_NVTX_RANGE_SCOPE("thrust::is_partitioned");
using thrust::system::detail::generic::select_system;
using System = typename thrust::iterator_system<InputIterator>::type;
System system;
return thrust::is_partitioned(select_system(system), first, last, pred);
} // end is_partitioned()
THRUST_NAMESPACE_END
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