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    "id": "mpabi-freertos-cpp-12-semaphore-notify",
    "series": "freertos-cpp",
    "series_title": "FreeRTOS C++",
    "number": "12",
    "count": "16",
    "slug": "semaphore-notify",
    "title": "Semaphores and Task Notifications",
    "topic": "Binary/counting bounds, blocked wakeup and explicit notification actions",
    "project": "Freestanding C++ nad FreeRTOS",
    "subject": "Informatyka",
    "level": "Rok 2 · L11 · RV32I/Hazard3",
    "revision_date": "2026-07-19T00:00:00+02:00",
    "status": "Gotowa",
    "version": "v00.01",
    "uuid": "fcb6107c-268f-4e86-a8cc-092e5875f6f0",
    "author": "M. Pabiszczak",
    "year": "2026"
  },
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  "title_block": {
    "category": "KARTA PRACY · INFORMATYKA",
    "prepared_by": "M. Pabiszczak",
    "prepared_on": "2026-07-19T00:00:00+02:00",
    "title": "Semaphores and Task Notifications",
    "repository_url": "https://zsl-gitea.mpabi.pl/edu-freertos-cpp/lab-rv32i-freertos-semaphore-notify",
    "revision": "v00.01",
    "issued_on": "2026-07-19T00:00:00+02:00",
    "series": "FREERTOS-CPP-12",
    "document_type": "karta pracy",
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    "url": "https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/fcb6107c-268f-4e86-a8cc-092e5875f6f0"
  },
  "front_page_scope": {
    "title": "Cel karty",
    "content_tex": "Uczeń wybiera binary/counting semaphore lub task notification na podstawie cardinality i stanu, a następnie dowodzi block/wake, bounds oraz action i clear policy.",
    "scope_title": "Zakres karty",
    "scope_content_tex": "Semaphore nie przechowuje payloadu. Notification jest kanałem jednego taska/TCB slotu; nie zastępuje kolejki wielu odbiorców."
  },
  "side_margin_tree_layout": {
    "columns": [
      {
        "id": "zawodowe",
        "label": "TECH",
        "side": "left",
        "tree": "WE -> EK -> KW",
        "description": "Counts, task states, TCB value i event order."
      },
      {
        "id": "ogolne",
        "label": "OG",
        "side": "right",
        "tree": "WE -> EN -> KW",
        "description": "Cardinality, payload i clear semantics."
      }
    ]
  },
  "learning_effects": {
    "K12.EN01": {
      "bloom_level": "Analiza",
      "label": "Wybór mechanizmu",
      "text": "Uczeń rozróżnia sygnał binary, count zasobu i jednoodbiorczą notification value.",
      "assessment_criteria": [
        "K12.KW01"
      ]
    },
    "K12.EK01": {
      "bloom_level": "Zastosowanie",
      "label": "Block i wake",
      "text": "Uczeń mierzy bounds, eBlocked, handoff, notification take i jawny overwrite value.",
      "assessment_criteria": [
        "K12.KW01"
      ]
    }
  },
  "assessment_criteria": {
    "K12.KW01": {
      "text": "Program kończy się PASS; binary 0-1-0, counting 2-1-0 i waiter Blocked, give budzi z count 0, notification take=1, overwrite value=0xA5A55A5A, storage nie zmienia heapu.",
      "learning_effects": [
        "K12.EN01",
        "K12.EK01"
      ]
    }
  },
  "educational_requirements": {
    "K12.WE01": {
      "text": "Dobór i implementacja synchronizacji według cardinality, count/value i storage.",
      "label": "Semaphores i notifications",
      "learning_effects": [
        "K12.EN01",
        "K12.EK01"
      ],
      "learning_tree": {
        "schema": "we-learning-tree.v1",
        "policy": "Każdy mechanizm ma jawny stan, odbiorcę, storage oraz politykę konsumpcji.",
        "ogolne": [
          {
            "effect_ref": "K12.EN01",
            "display": "EN LOCAL RTOS.SYNC.01",
            "source": "LOCAL",
            "official": "RTOS.SYNC",
            "local": "01",
            "kind": "EN",
            "tree_id": "K12.WE01.OG.LOCAL.RTOS.SYNC.01",
            "text": "Analizuje cardinality i semantykę signal/count/value.",
            "kw": [
              {
                "criterion_ref": "K12.KW01",
                "display": "KW LOCAL RTOS.SYNC.01",
                "source": "LOCAL",
                "kind": "KW",
                "official": "RTOS.SYNC",
                "local": "01",
                "text": "Dobiera mechanizm bez przypisywania semaphore payloadu ani notification wielu konsumentów."
              }
            ]
          }
        ],
        "zawodowe": [
          {
            "effect_ref": "K12.EK01",
            "display": "EK LOCAL DBG.SYNC.01",
            "source": "LOCAL",
            "official": "DBG.SYNC",
            "local": "01",
            "kind": "EK",
            "tree_id": "K12.WE01.TECH.LOCAL.DBG.SYNC.01",
            "text": "Mierzy count, blocked state, wake sequence i TCB notification value.",
            "kw": [
              {
                "criterion_ref": "K12.KW01",
                "display": "KW LOCAL DBG.SYNC.01",
                "source": "LOCAL",
                "kind": "KW",
                "official": "DBG.SYNC",
                "local": "01",
                "text": "Pokazuje 0/1, 2/1/0, take=1, overwrite value i PASS."
              }
            ]
          }
        ]
      }
    }
  },
  "sections": [
    {
      "title": "Binary i counting bounds",
      "content_kind": "prose",
      "content_tex": "Zmierz binary 0-1-0 i counting 2-1-0, odrzuć give przy maximum oraz zablokuj trzeci take.",
      "educational_requirement_refs": [
        "K12.WE01"
      ],
      "learning_effect_refs": [
        "K12.EK01"
      ],
      "assessment_criterion_refs": [
        "K12.KW01"
      ],
      "area_tree_refs": [
        "K12.WE01.TECH.LOCAL.DBG.SYNC.01"
      ],
      "steps": [
        {
          "id": "S01",
          "title": "Potwierdź bounds obu semaphore.",
          "tree_refs": [
            "K12.WE01.TECH.LOCAL.DBG.SYNC.01"
          ]
        },
        {
          "id": "S02",
          "title": "Pokaż eBlocked i natychmiastowy handoff count 0.",
          "tree_refs": [
            "K12.WE01.TECH.LOCAL.DBG.SYNC.01"
          ]
        }
      ]
    },
    {
      "title": "Notification count i value",
      "content_kind": "prose",
      "content_tex": "Zastąp jednoodbiorczy wake przez TCB give/take, a potem prześlij jawną wartość przez overwrite/wait.",
      "educational_requirement_refs": [
        "K12.WE01"
      ],
      "learning_effect_refs": [
        "K12.EK01"
      ],
      "assessment_criterion_refs": [
        "K12.KW01"
      ],
      "area_tree_refs": [
        "K12.WE01.TECH.LOCAL.DBG.SYNC.01"
      ],
      "steps": [
        {
          "id": "S03",
          "title": "Zapisz pending checkpoint i take result 1.",
          "tree_refs": [
            "K12.WE01.TECH.LOCAL.DBG.SYNC.01"
          ]
        },
        {
          "id": "S04",
          "title": "Odbierz overwrite 0xA5A55A5A.",
          "tree_refs": [
            "K12.WE01.TECH.LOCAL.DBG.SYNC.01"
          ]
        }
      ]
    },
    {
      "title": "Cardinality, storage i clear policy",
      "content_kind": "prose",
      "content_tex": "Porównaj caller semaphore control z notification state w TCB i dobierz clear-on-exit lub decrement do binary/counting znaczenia.",
      "educational_requirement_refs": [
        "K12.WE01"
      ],
      "learning_effect_refs": [
        "K12.EN01"
      ],
      "assessment_criterion_refs": [
        "K12.KW01"
      ],
      "area_tree_refs": [
        "K12.WE01.OG.LOCAL.RTOS.SYNC.01"
      ],
      "steps": [
        {
          "id": "S05",
          "title": "Dobierz mechanizm do trzech scenariuszy.",
          "tree_refs": [
            "K12.WE01.OG.LOCAL.RTOS.SYNC.01"
          ]
        },
        {
          "id": "S06",
          "title": "Uzasadnij one receiver i brak payloadu semaphore.",
          "tree_refs": [
            "K12.WE01.OG.LOCAL.RTOS.SYNC.01"
          ]
        }
      ]
    }
  ],
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      "title": "Semaphore slots i jednoodbiorcza notification",
      "uuid": "fcb6107c-268f-4e86-a8cc-092e5875f6f0",
      "prompt_tex": "Porównaj binary/counting semaphore i task notification przez bounds, blocked/wake, storage, take clear policy oraz explicit overwrite value.",
      "criterion": "Binary 0-1-0; counting 2-1-0/eBlocked/handoff; notify take 1; overwrite A5A55A5A; heap delta 0; pass=1.",
      "educational_requirement_refs": [
        "K12.WE01"
      ],
      "learning_effect_refs": [
        "K12.EN01",
        "K12.EK01"
      ],
      "assessment_criterion_ref": "K12.KW01",
      "links": {
        "equations": [],
        "figures": []
      }
    }
  },
  "tasks_order": [
    "task01"
  ]
}