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[CCCL] 瘦身 + 补全: 移除 cudax/python/libcudacxx-tests 冗余文件, 新增 c2h 测试助手 + cmake 构建系统 + 8 个 CUDA thrust examples

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变更摘要:
- 删除: cudax/ (783 files, 7.2M) — 实验性组件，竞赛不需要
- 删除: python/ (226 files, 2.0M) — Python 绑定，竞赛不需要
- 删除: libcudacxx/{test,benchmarks,codegen,cmake,share} (4432 files, 31M)
  保留: libcudacxx/include/ (1463 headers, cuda::std 编译依赖)
- 新增: c2h/ (27 files) — CUB Catch2 测试辅助头文件，编译 243 个测试必需
- 新增: cmake/ (29 files) — CCCL 原生 CMake 构建系统
- 新增: thrust/examples/cuda/ (7 files) + cpp_integration/ (1 file)
  async_reduce, custom_temporary_allocation, explicit_cuda_stream,
  global_device_vector, range_view, unwrap_pointer, wrap_pointer, device

结果: cccl_upstream 从 74M→35M (瘦身 53%), 核心内容 100% 保留:
  27/27 tuning headers, 78 benchmarks, 243 tests,
  60 thrust examples, 18 CUB examples, 全部编译头文件
This commit is contained in:
muh-bot
2026-08-03 12:39:26 +00:00
parent a2a5dd8f00
commit 24ef6a91b5
5439 changed files with 0 additions and 719516 deletions
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261
cccl_upstream/cudax/test/execution/test_when_all.cu
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//===----------------------------------------------------------------------===//
//
// Part of CUDA Experimental in CUDA C++ Core Libraries,
// under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#include <cuda/std/__tuple_dir/ignore.h>
#include <cuda/experimental/execution.cuh>
#include "common/checked_receiver.cuh"
#include "common/error_scheduler.cuh"
#include "common/impulse_scheduler.cuh" // IWYU pragma: keep
#include "common/stopped_scheduler.cuh"
#include "common/utility.cuh"
#include "testing.cuh" // IWYU pragma: keep
namespace ex = cuda::experimental::execution;
namespace
{
C2H_TEST("when_all simple example", "[when_all]")
{
auto snd = ex::when_all(ex::just(3), ex::just(0.1415));
auto snd1 = std::move(snd) | ex::then([](int x, double y) {
return x + y;
});
auto op = ex::connect(std::move(snd1), checked_value_receiver{3.1415});
ex::start(op);
}
C2H_TEST("when_all returning two values can be waited on", "[when_all]")
{
auto snd = ex::when_all(ex::just(2), ex::just(3));
check_values(std::move(snd), 2, 3);
}
C2H_TEST("when_all with 5 senders", "[when_all]")
{
auto snd = ex::when_all(ex::just(2), ex::just(3), ex::just(5), ex::just(7), ex::just(11));
check_values(std::move(snd), 2, 3, 5, 7, 11);
}
C2H_TEST("when_all with just one sender", "[when_all]")
{
auto snd = ex::when_all(ex::just(2));
check_values(std::move(snd), 2);
}
C2H_TEST("when_all with move-only types", "[when_all]")
{
auto snd = ex::when_all(ex::just(movable(2)));
check_values(std::move(snd), movable(2));
}
C2H_TEST("when_all with no senders", "[when_all]")
{
auto snd = ex::when_all();
check_values(std::move(snd));
}
C2H_TEST("when_all when one sender sends void", "[when_all]")
{
auto snd = ex::when_all(ex::just(2), ex::just());
check_values(std::move(snd), 2);
}
#if !defined(__CUDA_ARCH__)
C2H_TEST("when_all completes when children complete", "[when_all]")
{
impulse_scheduler sched;
bool called{false};
auto snd = ex::when_all(ex::just(11) | ex::continues_on(sched),
ex::just(13) | ex::continues_on(sched),
ex::just(17) | ex::continues_on(sched))
| ex::then([&](int a, int b, int c) {
called = true;
return a + b + c;
});
auto op = ex::connect(std::move(snd), checked_value_receiver{41});
ex::start(op);
// The when_all scheduler will complete only after 3 impulses
CHECK_FALSE(called);
sched.start_next();
CHECK_FALSE(called);
sched.start_next();
CHECK_FALSE(called);
sched.start_next();
CHECK(called);
}
#endif
C2H_TEST("when_all can be used with just_*", "[when_all]")
{
auto snd = ex::when_all(ex::just(2), ex::just_error(42), ex::just_stopped());
auto op = ex::connect(std::move(snd), checked_error_receiver{42});
ex::start(op);
}
C2H_TEST("when_all terminates with error if one child terminates with error", "[when_all]")
{
error_scheduler sched{42};
auto snd = ex::when_all(ex::just(2), ex::just(5) | ex::continues_on(sched), ex::just(7));
auto op = ex::connect(std::move(snd), checked_error_receiver{42});
ex::start(op);
}
C2H_TEST("when_all terminates with stopped if one child is cancelled", "[when_all]")
{
stopped_scheduler sched;
auto snd = ex::when_all(ex::just(2), ex::just(5) | ex::continues_on(sched), ex::just(7));
auto op = ex::connect(std::move(snd), checked_stopped_receiver{});
ex::start(op);
}
#if !defined(__CUDA_ARCH__)
C2H_TEST("when_all cancels remaining children if error is detected", "[when_all]")
{
impulse_scheduler sched;
error_scheduler err_sched{42};
bool called1{false};
bool called3{false};
bool cancelled{false};
auto snd = ex::when_all(
ex::starts_on(sched, ex::just()) | ex::then([&] {
called1 = true;
}),
ex::starts_on(sched, ex::just(5) | ex::continues_on(err_sched)),
ex::starts_on(sched, ex::just()) | ex::then([&] {
called3 = true;
}) | ex::let_stopped([&] {
cancelled = true;
return ex::just();
}));
auto op = ex::connect(std::move(snd), checked_error_receiver{42});
ex::start(op);
// The first child will complete; the third one will be cancelled
CHECK_FALSE(called1);
CHECK_FALSE(called3);
sched.start_next(); // start the first child
CHECK(called1);
sched.start_next(); // start the second child; this will generate an error
CHECK_FALSE(called3);
sched.start_next(); // start the third child
CHECK_FALSE(called3);
CHECK(cancelled);
}
C2H_TEST("when_all cancels remaining children if cancel is detected", "[when_all]")
{
stopped_scheduler stopped_sched;
impulse_scheduler sched;
bool called1{false};
bool called3{false};
bool cancelled{false};
auto snd = ex::when_all(
ex::starts_on(sched, ex::just()) | ex::then([&] {
called1 = true;
}),
ex::starts_on(sched, ex::just(5) | ex::continues_on(stopped_sched)),
ex::starts_on(sched, ex::just()) | ex::then([&] {
called3 = true;
}) | ex::let_stopped([&] {
cancelled = true;
return ex::just();
}));
auto op = ex::connect(std::move(snd), checked_stopped_receiver{});
ex::start(op);
// The first child will complete; the third one will be cancelled
CHECK_FALSE(called1);
CHECK_FALSE(called3);
sched.start_next(); // start the first child
CHECK(called1);
sched.start_next(); // start the second child; this will call set_stopped
CHECK_FALSE(called3);
sched.start_next(); // start the third child
CHECK_FALSE(called3);
CHECK(cancelled);
}
#endif
template <class... Ts>
struct just_ref
{
using sender_concept = ex::sender_t;
template <class Self, class... Env>
_CCCL_HOST_DEVICE static constexpr auto get_completion_signatures()
{
return ex::completion_signatures<ex::set_value_t(Ts & ...)>{};
}
_CCCL_HOST_DEVICE just_ref connect(cuda::std::__ignore_t) const
{
return {};
}
};
C2H_TEST("when_all has the values_type based on the children, decayed and as rvalue "
"references",
"[when_all]")
{
check_value_types<types<int>>(ex::when_all(ex::just(13)));
check_value_types<types<double>>(ex::when_all(ex::just(3.14)));
check_value_types<types<int, double>>(ex::when_all(ex::just(3, 0.14)));
check_value_types<types<>>(ex::when_all(ex::just()));
check_value_types<types<int, double>>(ex::when_all(ex::just(3), ex::just(0.14)));
check_value_types<types<int, double, int, double>>(ex::when_all(ex::just(3), ex::just(0.14), ex::just(1, 0.4142)));
// if one child returns void, then the value is simply missing
check_value_types<types<int, double>>(ex::when_all(ex::just(3), ex::just(), ex::just(0.14)));
// if one child has no value completion, the when_all has no value
// completion
check_value_types<>(ex::when_all(ex::just(3), ex::just_stopped(), ex::just(0.14)));
// if children send references, they get decayed
check_value_types<types<int, double>>(ex::when_all(just_ref<int>(), just_ref<double>()));
}
C2H_TEST("when_all has the error_types based on the children", "[when_all]")
{
check_error_types<int>(ex::when_all(ex::just_error(13)));
check_error_types<double>(ex::when_all(ex::just_error(3.14)));
check_error_types<>(ex::when_all(ex::just()));
check_error_types<int, double>(ex::when_all(ex::just_error(3), ex::just_error(0.14)));
check_error_types<int, double, string>(
ex::when_all(ex::just_error(3), ex::just_error(0.14), ex::just_error(string{"err"})));
check_error_types<error_code>(
ex::when_all(ex::just(13), ex::just_error(error_code{std::errc::invalid_argument}), ex::just_stopped()));
// if the child sends something with a potentially throwing decay-copy,
// the when_all has an exception_ptr error completion.
check_error_types<ex::exception_ptr>(ex::when_all(just_ref<potentially_throwing>()));
}
C2H_TEST("when_all has the sends_stopped == true", "[when_all]")
{
check_sends_stopped<true>(ex::when_all(ex::just(13)));
check_sends_stopped<true>(ex::when_all(ex::just_error(-1)));
check_sends_stopped<true>(ex::when_all(ex::just_stopped()));
check_sends_stopped<true>(ex::when_all(ex::just(3), ex::just(0.14)));
check_sends_stopped<true>(ex::when_all(ex::just(3), ex::just_error(-1), ex::just_stopped()));
}
} // namespace