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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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290
cccl_upstream/cudax/test/execution/test_starts_on.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) 2025 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#include <cuda/experimental/execution.cuh>
#include "../common/testing.cuh" // IWYU pragma: keep
#include "common/checked_receiver.cuh"
#include "common/dummy_scheduler.cuh"
#include "common/error_scheduler.cuh"
#include "common/stopped_scheduler.cuh"
#include "common/utility.cuh"
#if _CCCL_HOST_COMPILATION()
# include "common/impulse_scheduler.cuh"
#endif
#if _CCCL_COMPILER(GCC, <, 12)
// suppress buggy warning on older gcc versions
_CCCL_DIAG_SUPPRESS_GCC("-Wmissing-field-initializers")
#endif
namespace ex = cuda::experimental::execution;
namespace
{
C2H_TEST("starts_on simple example", "[adaptors][starts_on]")
{
auto snd = ex::starts_on(dummy_scheduler{}, ex::just(42));
auto op = ex::connect(std::move(snd), checked_value_receiver{42});
ex::start(op);
// The receiver checks if we receive the right value
}
C2H_TEST("starts_on can be piped", "[adaptors][starts_on]")
{
// Use starts_on with the inline scheduler and pipe with then
auto snd = ex::starts_on(dummy_scheduler{}, ex::just(42)) //
| ex::then([](int val) {
return val * 2;
});
auto op = ex::connect(std::move(snd), checked_value_receiver{84});
ex::start(op);
// The receiver checks if we receive the transformed value
}
#if _CCCL_HOST_COMPILATION()
C2H_TEST("starts_on with impulse scheduler", "[adaptors][starts_on]")
{
bool sender_executed = false;
impulse_scheduler sched;
auto snd = ex::starts_on(sched, ex::just() | ex::then([&]() {
sender_executed = true;
return 13;
}));
auto op = ex::connect(std::move(snd), checked_value_receiver{13});
ex::start(op);
// At this point, the scheduler should have been started but the sender not yet executed
REQUIRE(!sender_executed);
// Tell the scheduler to start executing one task
sched.start_next();
// Now the sender should be executed
REQUIRE(sender_executed);
}
C2H_TEST("starts_on execution order", "[adaptors][starts_on]")
{
int counter = 0;
impulse_scheduler sched;
auto snd = ex::starts_on(sched, ex::just() | ex::then([&]() {
return ++counter;
}));
auto op = ex::connect(std::move(snd), checked_value_receiver{1});
ex::start(op);
// Counter should still be 0 since scheduler hasn't executed yet
CHECK(counter == 0);
// Tell the scheduler to start executing
sched.start_next();
// Now the sender should have executed and incremented counter
CHECK(counter == 1);
}
C2H_TEST("starts_on with thread context", "[adaptors][starts_on]")
{
ex::thread_context thread;
bool executed = false;
auto snd = ex::starts_on(thread.get_scheduler(), ex::just() | ex::then([&]() {
executed = true;
return 123;
}));
auto op = ex::connect(std::move(snd), checked_value_receiver{123});
ex::start(op);
thread.join();
// The work should have been executed on the thread
REQUIRE(executed);
}
#endif
C2H_TEST("starts_on can be called with rvalue ref scheduler", "[adaptors][starts_on]")
{
auto snd = ex::starts_on(dummy_scheduler{}, ex::just(42));
auto op = ex::connect(std::move(snd), checked_value_receiver{42});
ex::start(op);
}
C2H_TEST("starts_on can be called with const ref scheduler", "[adaptors][starts_on]")
{
const dummy_scheduler<> sched;
auto snd = ex::starts_on(sched, ex::just(42));
auto op = ex::connect(std::move(snd), checked_value_receiver{42});
ex::start(op);
}
C2H_TEST("starts_on can be called with ref scheduler", "[adaptors][starts_on]")
{
dummy_scheduler<> sched;
auto snd = ex::starts_on(sched, ex::just(42));
auto op = ex::connect(std::move(snd), checked_value_receiver{42});
ex::start(op);
}
C2H_TEST("starts_on forwards scheduler errors", "[adaptors][starts_on]")
{
auto ec = error_code{std::errc::invalid_argument};
error_scheduler<error_code> sched{ec};
auto snd = ex::starts_on(sched, ex::just(42));
auto op = ex::connect(std::move(snd), checked_error_receiver{ec});
ex::start(op);
// The receiver checks if we receive the error from the scheduler
}
C2H_TEST("starts_on forwards scheduler errors of other types", "[adaptors][starts_on]")
{
error_scheduler<string> sched{string{"scheduler error"}};
auto snd = ex::starts_on(sched, ex::just(42));
auto op = ex::connect(std::move(snd), checked_error_receiver{string{"scheduler error"}});
ex::start(op);
}
C2H_TEST("starts_on forwards scheduler stopped signal", "[adaptors][starts_on]")
{
stopped_scheduler sched{};
auto snd = ex::starts_on(sched, ex::just(42));
auto op = ex::connect(std::move(snd), checked_stopped_receiver{});
ex::start(op);
}
C2H_TEST("starts_on forwards sender errors", "[adaptors][starts_on]")
{
auto ec = error_code{std::errc::operation_not_permitted};
auto snd = ex::starts_on(dummy_scheduler{}, ex::just_error(ec));
auto op = ex::connect(std::move(snd), checked_error_receiver{ec});
ex::start(op);
}
C2H_TEST("starts_on forwards sender stopped signal", "[adaptors][starts_on]")
{
auto snd = ex::starts_on(dummy_scheduler{}, ex::just_stopped());
auto op = ex::connect(std::move(snd), checked_stopped_receiver{});
ex::start(op);
}
C2H_TEST("starts_on preserves multiple values", "[adaptors][starts_on]")
{
auto snd = ex::starts_on(dummy_scheduler{}, ex::just(1, 2.5, string{"hello"}));
auto op = ex::connect(std::move(snd), checked_value_receiver{1, 2.5, string{"hello"}});
ex::start(op);
}
C2H_TEST("starts_on has the values_type corresponding to the child sender", "[adaptors][starts_on]")
{
dummy_scheduler<> sched{};
check_value_types<types<int>>(ex::starts_on(sched, ex::just(1)));
check_value_types<types<int, double>>(ex::starts_on(sched, ex::just(3, 0.14)));
check_value_types<types<int, double, string>>(ex::starts_on(sched, ex::just(3, 0.14, string{"pi"})));
}
C2H_TEST("starts_on includes error_types from both scheduler and sender", "[adaptors][starts_on]")
{
dummy_scheduler<> sched1{};
error_scheduler<std::error_code> sched2{std::make_error_code(std::errc::invalid_argument)};
error_scheduler<int> sched3{43};
// Inline scheduler has no errors, sender has no errors
check_error_types<>(ex::starts_on(sched1, ex::just(1)));
// Error scheduler has std::error_code, sender has no errors
check_error_types<std::error_code>(ex::starts_on(sched2, ex::just(2)));
// Error scheduler has int, sender has no errors
check_error_types<int>(ex::starts_on(sched3, ex::just(3)));
}
C2H_TEST("starts_on sends_stopped includes both scheduler and sender", "[adaptors][starts_on]")
{
dummy_scheduler<> sched1{};
error_scheduler<error_code> sched2{error_code{std::errc::invalid_argument}};
stopped_scheduler sched3{};
// Neither scheduler nor sender sends stopped
check_sends_stopped<false>(ex::starts_on(sched1, ex::just(1)));
// Scheduler does not send stopped but the sender does
check_sends_stopped<true>(ex::starts_on(sched2, ex::just_stopped()));
// Scheduler sends stopped, sender doesn't
check_sends_stopped<true>(ex::starts_on(sched3, ex::just(3)));
}
C2H_TEST("starts_on works with const sender", "[adaptors][starts_on]")
{
const auto base_sender = ex::just(42);
auto snd = ex::starts_on(dummy_scheduler{}, base_sender);
auto op = ex::connect(std::move(snd), checked_value_receiver{42});
ex::start(op);
}
struct test_domain
{};
C2H_TEST("starts_on has the right completion scheduler", "[adaptors][starts_on]")
{
SECTION("thread scheduler with a sender that completes inline")
{
ex::thread_context thread;
auto sch = thread.get_scheduler();
auto snd = ex::starts_on(sch, ex::just());
CHECK(ex::get_completion_scheduler<ex::set_value_t>(ex::get_env(snd), ex::env{}) == sch);
}
SECTION("thread scheduler with a sender that completes on another thread")
{
ex::thread_context thread1, thread2;
auto sch1 = thread1.get_scheduler(), sch2 = thread2.get_scheduler();
auto snd = ex::starts_on(sch1, ex::starts_on(sch2, ex::just()));
CHECK(ex::get_completion_scheduler<ex::set_value_t>(ex::get_env(snd), ex::env{}) == sch2);
}
SECTION("inline scheduler with inline sender completion with a given starting scheduler")
{
ex::thread_context thread;
auto sch = thread.get_scheduler();
auto env = ex::prop{ex::get_scheduler, sch};
auto snd = ex::starts_on(ex::inline_scheduler{}, ex::just());
STATIC_REQUIRE(!cudax::__callable<ex::get_completion_scheduler_t<ex::set_value_t>, ex::env_of_t<decltype(snd)>>);
CHECK(ex::get_completion_scheduler<ex::set_value_t>(ex::get_env(snd), env) == sch);
}
SECTION("inline scheduler with inline sender completion with an inline starting scheduler")
{
constexpr auto sch = ex::inline_scheduler{};
[[maybe_unused]] constexpr auto env = ex::prop{ex::get_scheduler, sch};
[[maybe_unused]] constexpr auto snd = ex::starts_on(sch, ex::just());
using snd_t = decltype(snd);
STATIC_REQUIRE(!cudax::__callable<ex::get_completion_scheduler_t<ex::set_value_t>, ex::env_of_t<snd_t>>);
STATIC_REQUIRE(ex::get_completion_scheduler<ex::set_value_t>(ex::get_env(snd), env) == sch);
}
SECTION("inline scheduler but sender knows where it completes")
{
ex::thread_context thread;
auto sch = thread.get_scheduler();
auto snd = ex::starts_on(dummy_scheduler{}, ex::schedule(sch));
CHECK(ex::get_completion_scheduler<ex::set_value_t>(ex::get_env(snd)) == sch);
}
}
} // anonymous namespace