{"id":16863663,"url":"https://github.com/harrism/ranger","last_synced_at":"2025-03-22T06:32:09.165Z","repository":{"id":60238315,"uuid":"473012604","full_name":"harrism/ranger","owner":"harrism","description":"Generate simple index ranges in C++ and CUDA C++","archived":false,"fork":false,"pushed_at":"2023-06-14T00:39:12.000Z","size":18,"stargazers_count":39,"open_issues_count":0,"forks_count":3,"subscribers_count":2,"default_branch":"main","last_synced_at":"2025-03-18T09:05:28.456Z","etag":null,"topics":["cpp","cuda","loops","ranges"],"latest_commit_sha":null,"homepage":"","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"apache-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/harrism.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2022-03-23T02:41:24.000Z","updated_at":"2024-10-01T12:22:49.000Z","dependencies_parsed_at":"2024-10-28T18:00:31.082Z","dependency_job_id":null,"html_url":"https://github.com/harrism/ranger","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/harrism%2Franger","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/harrism%2Franger/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/harrism%2Franger/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/harrism%2Franger/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/harrism","download_url":"https://codeload.github.com/harrism/ranger/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":244918499,"owners_count":20531683,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["cpp","cuda","loops","ranges"],"created_at":"2024-10-13T14:39:16.927Z","updated_at":"2025-03-22T06:32:04.147Z","avatar_url":"https://github.com/harrism.png","language":"C++","readme":"# Ranger: CUDA-enabled range helpers for C++ range-based for loops\n\nFacilities for generating simple index ranges for C++ range-based for loops. Includes support for\nCUDA grid-stride ranges.\n\n## Examples:\n\n\n```\n// generate values from 0 to N\nfor (auto i : range(N)) {\n  std::cout \u003c\u003c i \u003c\u003c std::endl;\n}\n```\n\n```\n// generate values from `begin` to `end`\nfor (auto i : range(begin, end)) {\n  std::cout \u003c\u003c i \u003c\u003c std::endl;\n}\n```\n\n```\n// generate values stepping by `step` from `begin` to `end`\nfor (auto i : range(begin, end, step)) {\n  std::cout \u003c\u003c i \u003c\u003c std::endl;\n}\n```\n\n``` \n// generate values from 0 to N in a kernel\n__global__ void size_kernel(int N, int* out)\n{\n  for (auto i : grid_stride_range(N)) {\n    out[i] = i;\n  }\n}\n```\n\n```\n// generate values from begin to N in a kernel\n__global__ void begin_end_kernel(int begin, end, int* out)\n{\n  for (auto i : grid_stride_range(begin, end)) {\n    out[i-begin] = i;\n  }\n}\n```\n\n```\n// generate values stepping by `step` from 0 to N in a kernel\n__global__ void step_kernel(int N, int step, int* out)\n{\n  for (auto i : grid_stride_range(0, N, step)) {\n    out[i / step] = i;\n  }\n}\n```\n\n```\n// This version of grid_stride_range returns an index and an active_mask that excludes\n// threads that step outside the range\ntemplate \u003ctypename Predicate\u003e\n__global__ void valid_if_kernel(active_mask_type* output, thread_index_type size, Predicate pred)\n{\n  constexpr std::int32_t leader_lane{0};\n  constexpr std::int32_t warp_size{32};\n  thread_index_type const lane_id{threadIdx.x % warp_size};\n\n  active_mask_type initial_active_mask = 0xFFFF'FFFF;\n\n  for (auto [i, active_mask] : grid_stride_range(size, initial_active_mask)) {\n    active_mask_type ballot = __ballot_sync(active_mask, pred(i));\n    if (lane_id == leader_lane) { output[i / warp_size] = ballot; }\n  }\n}\n```\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fharrism%2Franger","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fharrism%2Franger","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fharrism%2Franger/lists"}