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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET1/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
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Uczeń projektuje rozłączne maski EventGroup i dowodzi różnicy między oczekiwaniem ALL a trzyosobową barierą.

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Koordynator p3 blokuje się na READY_ALL. Worker A ustawia READY_A i blokuje się w xEventGroupSync. Worker B potwierdza maskę częściową, ustawia READY_B, po czym koordynator wnosi SYNC_C. Ostatni SYNC_B zwalnia wszystkich; każdy wynik zawiera 0x70, a automatycznie wyczyszczona grupa kończy z 0.

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bit masks, wait semantics, automatic clear i xEventGroupSync

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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET2/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
GITEA  https://zsl-gitea.mpabi.pl/edu-freertos-c/lab-rv32i-freertos-c-event-groups
HTML  https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f
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", "content_html": "", "tasks": [], "assets": [ { "label": "fig:a2-structure", "logical_label": "fig:a2-structure", "figure_number": 1, "caption": "A2 STRUCTURE — READY and SYNC masks. — część 1/1 (r1 c1)", "alt": "Struktura EventGroup.", "href": "figures/a2-structure.svg", "source_href": "figures/a2-structure.puml", "width": 1.0, "kind": "diagram", "interactive": { "kind": "uml-class", "storage_key": "fc09-a2-structure-tile-1", "title": "A2 · masks and participants", "task": { "id": "task01", "label": "Task01 · EventGroup" }, "block": { "id": "a2", "label": "A2 STRUCTURE", "description": "One group, two disjoint protocols and three participants." }, "phases": [ { "id": "structure", "label": "GROUP / MASKS / PARTICIPANTS", "steps": [ { "id": "group", "number": 1, "label": "one real EventGroup", "mode": "CODE", "strategy_ref": "code.protocol", "svg_label": "01", "code_ref": "src/tasks/task01_event_groups.c:261", "description": "Kernel object holds bits and wait lists.", "evidence": "xEventGroupCreate symbol.", "strategy": { "id": "task01/a2/structure/group", "kind": "code", "action": "open", "expected_observations": [ "disjoint low-bit masks", "finite waits" ], "assertions": [ "READY_ALL=0x03", "SYNC_ALL=0x70" ], "evidence_fields": [ "mask", "API", "code_ref" ], "prerequisites": [ "źródło FC09" ], "layout": [ "mask table", "EventGroupExperiment", "kernel config" ], "commands": [ "rg -n 'READY_|SYNC_|xEventGroup' include src" ], "template_id": "code.protocol" } }, { "id": "ready", "number": 2, "label": "READY bits are disjoint", "mode": "CODE", "strategy_ref": "code.protocol", "svg_label": "02", "code_ref": "include/task01_event_groups.h:11", "description": "A and B own one bit each.", "evidence": "ALL=0x03.", "strategy": { "id": "task01/a2/structure/ready", "kind": "code", "action": "open", "expected_observations": [ "disjoint low-bit masks", "finite waits" ], "assertions": [ "READY_ALL=0x03", "SYNC_ALL=0x70" ], "evidence_fields": [ "mask", "API", "code_ref" ], "prerequisites": [ "źródło FC09" ], "layout": [ "mask table", "EventGroupExperiment", "kernel config" ], "commands": [ "rg -n 'READY_|SYNC_|xEventGroup' include src" ], "template_id": "code.protocol" } }, { "id": "sync", "number": 3, "label": "SYNC is a separate mask", "mode": "CODE", "strategy_ref": "code.protocol", "svg_label": "03", "code_ref": "include/task01_event_groups.h:14", "description": "Barrier cannot consume readiness meaning.", "evidence": "ALL=0x70.", "strategy": { "id": "task01/a2/structure/sync", "kind": "code", "action": "open", "expected_observations": [ "disjoint low-bit masks", "finite waits" ], "assertions": [ "READY_ALL=0x03", "SYNC_ALL=0x70" ], "evidence_fields": [ "mask", "API", "code_ref" ], "prerequisites": [ "źródło FC09" ], "layout": [ "mask table", "EventGroupExperiment", "kernel config" ], "commands": [ "rg -n 'READY_|SYNC_|xEventGroup' include src" ], "template_id": "code.protocol" } }, { "id": "coordinator", "number": 4, "label": "coordinator waits ALL", "mode": "RUN", "event_id": "E02", "strategy_ref": "run.ready", "svg_label": "04", "code_ref": "src/tasks/task01_event_groups.c:97", "snapshot_ref": "task01.coordinator-wait", "description": "Partial READY cannot release p3.", "evidence": "Blocked path.", "strategy": { "id": "task01/a2/structure/coordinator", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "a", "number": 5, "label": "worker A owns READY_A/SYNC_A", "mode": "RUN", "event_id": "E04", "strategy_ref": "run.ready", "svg_label": "05", "code_ref": "src/tasks/task01_event_groups.c:140", "snapshot_ref": "task01.sync-a", "description": "A blocks at barrier.", "evidence": "partial mask follows.", "strategy": { "id": "task01/a2/structure/a", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "b", "number": 6, "label": "worker B contributes final bits", "mode": "RUN", "event_id": "E10", "strategy_ref": "run.barrier", "svg_label": "06", "code_ref": "src/tasks/task01_event_groups.c:183", "snapshot_ref": "task01.b-release", "description": "B completes READY then SYNC.", "evidence": "returns 0x70.", "strategy": { "id": "task01/a2/structure/b", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } } ] } ] }, "tile": { "index": 1, "count": 1, "row": 1, "column": 1, "rows": 1, "columns": 1, "x": 0.0, "y": 0.0, "width": 744.0, "height": 217.0, "full_x": 0.0, "full_y": 0.0, "full_width": 744.0, "full_height": 217.0, "page_width": 940.0, "page_height": 560.0, "overview": true, "step_ids": [ "a", "b", "coordinator", "group", "ready", "sync" ] }, "diagram_title": "A2 · masks and participants", "diagram_block_label": "A2 STRUCTURE", "diagram_description": "One group, two disjoint protocols 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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET3/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
GITEA  https://zsl-gitea.mpabi.pl/edu-freertos-c/lab-rv32i-freertos-c-event-groups
HTML  https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f
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", "content_html": "", "tasks": [], "assets": [ { "label": "fig:a4-application", "logical_label": "fig:a4-application", "figure_number": 2, "caption": "A4 APPLICATION — deterministic release topology. — część 1/1 (r1 c1)", "alt": "Topologia trzech tasków i verifiera.", "href": "figures/a4-application.svg", "source_href": "figures/a4-application.puml", "width": 1.0, "kind": "diagram", "interactive": { "kind": "uml-class", "storage_key": "fc09-a4-application-tile-1", "title": "A4 · participant topology", "task": { "id": "task01", "label": "Task01 · EventGroup" }, "block": { "id": "a4", "label": "A4 APPLICATION", "description": "Priorities create a deterministic observation order." }, "phases": [ { "id": "topology", "label": "BLOCK / SET / PREEMPT / VERIFY", "steps": [ { "id": "c", "number": 1, "label": "coordinator blocks first", "mode": "RUN", "event_id": "E02", "strategy_ref": "run.ready", "svg_label": "01", "code_ref": "src/tasks/task01_event_groups.c:96", "snapshot_ref": "task01.coordinator-wait", "description": "Priority 3.", "evidence": "coordinator stack.", "strategy": { "id": "task01/a4/topology/c", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "a", "number": 2, "label": "A publishes partial protocols", "mode": "RUN", "event_id": "E04", "strategy_ref": "run.ready", "svg_label": "02", "code_ref": "src/tasks/task01_event_groups.c:145", "snapshot_ref": "task01.sync-a", "description": "Priority 2 then block.", "evidence": "READY_A and SYNC_A.", "strategy": { "id": "task01/a4/topology/a", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "b", "number": 3, "label": "B observes two blocked tasks", "mode": "RUN", "event_id": "E05", "strategy_ref": "run.ready", "svg_label": "03", "code_ref": "src/tasks/task01_event_groups.c:175", "snapshot_ref": "task01.partial", "description": "No timing guess is needed.", "evidence": "0x11 and eBlocked.", "strategy": { "id": "task01/a4/topology/b", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "cp", "number": 4, "label": "coordinator preempts on READY_ALL", "mode": "RUN", "event_id": "E06", "strategy_ref": "run.ready", "svg_label": "04", "code_ref": "src/tasks/task01_event_groups.c:107", "snapshot_ref": "task01.ready-all", "description": "Higher p3 consumes READY epoch.", "evidence": "ready_result contains 0x03.", "strategy": { "id": "task01/a4/topology/cp", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "bf", "number": 5, "label": "B sets the final barrier bit", "mode": "RUN", "event_id": "E10", "strategy_ref": "run.barrier", "svg_label": "05", "code_ref": "src/tasks/task01_event_groups.c:190", "snapshot_ref": "task01.b-release", "description": "All three waiters return.", "evidence": "SYNC_ALL.", "strategy": { "id": "task01/a4/topology/bf", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } }, { "id": "v", "number": 6, "label": "p0 verifier observes final zero", "mode": "RUN", "event_id": "E11", "strategy_ref": "run.pass", "svg_label": "06", "code_ref": "src/tasks/task01_event_groups.c:230", "snapshot_ref": "task01.pass", "description": "Auto-clear is part of acceptance.", "evidence": "PASS and digest.", "strategy": { "id": "task01/a4/topology/v", "kind": "run", "action": "replay", "expected_observations": [ "PASS=1", "11 committed records" ], "assertions": [ "three-run deterministic", "distinct stacks" ], "evidence_fields": [ "PASS", "digest", "hashes", "timestamp" ], "prerequisites": [ "all participants done" ], "layout": [ "PASS", "bounded log", "digest" ], "commands": [ "print g_fc09_pass", "print g_fc09.evidence_digest" ], "template_id": "run.pass" } } ] } ] }, "tile": { "index": 1, "count": 1, "row": 1, "column": 1, "rows": 1, "columns": 1, "x": 0.0, "y": 0.0, "width": 314.0, "height": 684.0, "full_x": 0.0, "full_y": 0.0, "full_width": 314.0, "full_height": 684.0, "page_width": 660.0, "page_height": 760.0, "overview": true, "step_ids": [ "a", "b", "bf", "c", "cp", "v" ] }, "diagram_title": "A4 · participant topology", "diagram_block_label": "A4 APPLICATION", "diagram_description": "Priorities create a deterministic observation order.", "diagram_phase_labels": [ "BLOCK / SET / PREEMPT / VERIFY" ] } ], "steps": [], "spread_group": "", "spread_label": "A4 APPLICATION — deterministic release topology.", "spread_columns": 1, "spread_index": 1, "spread_count": 1, "page_orientation": "portrait" }, { "id": "section-3-content", "index": 3, "title": "A5 — Flow", "show_heading": false, "toc_entry": true, "header_html": "
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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET4/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
GITEA  https://zsl-gitea.mpabi.pl/edu-freertos-c/lab-rv32i-freertos-c-event-groups
HTML  https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f
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", "content_html": "", "tasks": [], "assets": [ { "label": "fig:a5-flow", "logical_label": "fig:a5-flow", "figure_number": 3, "caption": "A5 FLOW — ALL-ready followed by xEventGroupSync. — część 1/1 (r1 c1)", "alt": "Sekwencja EventGroup.", "href": "figures/a5-flow.svg", "source_href": "figures/a5-flow.puml", "width": 1.0, "kind": "diagram", "interactive": { "kind": "uml-sequence", "storage_key": "fc09-a5-flow-tile-1", "title": "A5 · ready and barrier flow", "task": { "id": "task01", "label": "Task01 · EventGroup" }, "block": { "id": "a5", "label": "A5 FLOW", "description": "Complete E01–E11 protocol flow." }, "phases": [ { "id": "flow", "label": "READY ALL / BARRIER / CLEAR", "steps": [ { "id": "config", "number": 1, "label": "group starts at zero", "mode": "RUN", "event_id": "E01", "strategy_ref": "run.ready", "svg_label": "01", "code_ref": "src/tasks/task01_event_groups.c:266", "snapshot_ref": "task01.config", "description": "Clean RAM.", "evidence": "bits=0.", "strategy": { "id": "task01/a5/flow/config", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "wait", "number": 2, "label": "coordinator waits ALL", "mode": "RUN", "event_id": "E02", "strategy_ref": "run.ready", "svg_label": "02", "code_ref": "src/tasks/task01_event_groups.c:98", "snapshot_ref": "task01.coordinator-wait", "description": "Finite timeout.", "evidence": "p3 blocks.", "strategy": { "id": "task01/a5/flow/wait", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "seta", "number": 3, "label": "A sets READY_A", "mode": "RUN", "event_id": "E03", "strategy_ref": "run.ready", "svg_label": "03", "code_ref": "src/tasks/task01_event_groups.c:140", "snapshot_ref": "task01.ready-a", "description": "ALL remains false.", "evidence": "bits 0x01.", "strategy": { "id": "task01/a5/flow/seta", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "synca", "number": 4, "label": "A contributes SYNC_A", "mode": "RUN", "event_id": "E04", "strategy_ref": "run.ready", "svg_label": "04", "code_ref": "src/tasks/task01_event_groups.c:146", "snapshot_ref": "task01.sync-a", "description": "A blocks.", "evidence": "next partial=0x11.", "strategy": { "id": "task01/a5/flow/synca", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "partial", "number": 5, "label": "B proves partial state", "mode": "RUN", "event_id": "E05", "strategy_ref": "run.ready", "svg_label": "05", "code_ref": "src/tasks/task01_event_groups.c:175", "snapshot_ref": "task01.partial", "description": "Neither protocol is complete.", "evidence": "0x11 and A Blocked.", "strategy": { "id": "task01/a5/flow/partial", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "ready", "number": 6, "label": "coordinator receives READY_ALL", "mode": "RUN", "event_id": "E06", "strategy_ref": "run.ready", "svg_label": "06", "code_ref": "src/tasks/task01_event_groups.c:107", "snapshot_ref": "task01.ready-all", "description": "Ready bits clear on exit.", "evidence": "result 0x03.", "strategy": { "id": "task01/a5/flow/ready", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "before", "number": 7, "label": "coordinator waits at barrier", "mode": "RUN", "event_id": "E07", "strategy_ref": "run.barrier", "svg_label": "07", "code_ref": "src/tasks/task01_event_groups.c:184", "snapshot_ref": "task01.before-final", "description": "B sees p3 Blocked.", "evidence": "state eBlocked.", "strategy": { "id": "task01/a5/flow/before", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } }, { "id": "c", "number": 8, "label": "coordinator leaves barrier", "mode": "RUN", "event_id": "E08", "strategy_ref": "run.barrier", "svg_label": "08", "code_ref": "src/tasks/task01_event_groups.c:120", "snapshot_ref": "task01.coordinator-release", "description": "Final B bit released it.", "evidence": "result contains 0x70.", "strategy": { "id": "task01/a5/flow/c", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } }, { "id": "a", "number": 9, "label": "A leaves barrier", "mode": "RUN", "event_id": "E09", "strategy_ref": "run.barrier", "svg_label": "09", "code_ref": "src/tasks/task01_event_groups.c:155", "snapshot_ref": "task01.a-release", "description": "A returns same complete mask.", "evidence": "0x70.", "strategy": { "id": "task01/a5/flow/a", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } }, { "id": "b", "number": 10, "label": "B returns and sync bits clear", "mode": "RUN", "event_id": "E10", "strategy_ref": "run.barrier", "svg_label": "10", "code_ref": "src/tasks/task01_event_groups.c:199", "snapshot_ref": "task01.b-release", "description": "Last contributor also receives full mask.", "evidence": "0x70.", "strategy": { "id": "task01/a5/flow/b", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } }, { "id": "pass", "number": 11, "label": "verifier commits PASS", "mode": "RUN", "event_id": "E11", "strategy_ref": "run.pass", "svg_label": "11", "code_ref": "src/tasks/task01_event_groups.c:230", "snapshot_ref": "task01.pass", "description": "Final group value is zero.", "evidence": "digest 2391788d.", "strategy": { "id": "task01/a5/flow/pass", "kind": "run", "action": "replay", "expected_observations": [ "PASS=1", "11 committed records" ], "assertions": [ "three-run deterministic", "distinct stacks" ], "evidence_fields": [ "PASS", "digest", "hashes", "timestamp" ], "prerequisites": [ "all participants done" ], "layout": [ "PASS", "bounded log", "digest" ], "commands": [ "print g_fc09_pass", "print g_fc09.evidence_digest" ], "template_id": "run.pass" } } ] } ] }, "tile": { "index": 1, "count": 1, "row": 1, "column": 1, "rows": 1, "columns": 1, "x": 0.0, "y": 0.0, "width": 572.0, "height": 530.0, "full_x": 0.0, "full_y": 0.0, "full_width": 572.0, "full_height": 530.0, "page_width": 940.0, "page_height": 560.0, "overview": true, "step_ids": [ "a", "b", "before", "c", "config", "partial", "pass", "ready", "seta", "synca", "wait" ] }, "diagram_title": "A5 · ready and barrier flow", "diagram_block_label": "A5 FLOW", "diagram_description": "Complete E01–E11 protocol flow.", "diagram_phase_labels": [ "READY ALL / BARRIER / CLEAR" ] } ], "steps": [], "spread_group": "", "spread_label": "A5 FLOW — ALL-ready followed by xEventGroupSync.", "spread_columns": 1, "spread_index": 1, "spread_count": 1, "page_orientation": "landscape" }, { "id": "section-4-content", "index": 4, "title": "A6 — State", "show_heading": false, "toc_entry": true, "header_html": "
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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET5/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
GITEA  https://zsl-gitea.mpabi.pl/edu-freertos-c/lab-rv32i-freertos-c-event-groups
HTML  https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f
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", "content_html": "", "tasks": [], "assets": [ { "label": "fig:a6-state", "logical_label": "fig:a6-state", "figure_number": 4, "caption": "A6 STATE — zero, partial, ready and barrier release. — część 1/1 (r1 c1)", "alt": "Maszyna stanu bitów.", "href": "figures/a6-state.svg", "source_href": "figures/a6-state.puml", "width": 1.0, "kind": "diagram", "interactive": { "kind": "uml-class", "storage_key": "fc09-a6-state-tile-1", "title": "A6 · bit-state machine", "task": { "id": "task01", "label": "Task01 · EventGroup" }, "block": { "id": "a6", "label": "A6 STATE", "description": "The same integer carries two explicit protocols." }, "phases": [ { "id": "state", "label": "ZERO / PARTIAL / COMPLETE / CLEAR", "steps": [ { "id": "zero", "number": 1, "label": "zero initial and final", "mode": "RUN", "event_id": "E01", "strategy_ref": "run.ready", "svg_label": "01", "code_ref": "src/tasks/task01_event_groups.c:261", "snapshot_ref": "task01.config", "description": "No retained epoch.", "evidence": "0x00.", "strategy": { "id": "task01/a6/state/zero", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "partial", "number": 3, "label": "READY_A is insufficient", "mode": "RUN", "event_id": "E05", "strategy_ref": "run.ready", "svg_label": "03", "code_ref": "src/tasks/task01_event_groups.c:175", "snapshot_ref": "task01.partial", "description": "Both waiters remain blocked.", "evidence": "0x11.", "strategy": { "id": "task01/a6/state/partial", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "all", "number": 6, "label": "READY_ALL releases and clears", "mode": "RUN", "event_id": "E06", "strategy_ref": "run.ready", "svg_label": "06", "code_ref": "src/tasks/task01_event_groups.c:97", "snapshot_ref": "task01.ready-all", "description": "Return contains pre-clear bits.", "evidence": "0x03.", "strategy": { "id": "task01/a6/state/all", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "barrier", "number": 10, "label": "SYNC_ALL releases and auto-clears", "mode": "RUN", "event_id": "E10", "strategy_ref": "run.barrier", "svg_label": "10", "code_ref": "src/tasks/task01_event_groups.c:190", "snapshot_ref": "task01.b-release", "description": "All participants see complete mask.", "evidence": "0x70 then 0.", "strategy": { "id": "task01/a6/state/barrier", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } } ] } ] }, "tile": { "index": 1, "count": 1, "row": 1, "column": 1, "rows": 1, "columns": 1, "x": 0.0, "y": 0.0, "width": 311.0, "height": 700.0, "full_x": 0.0, "full_y": 0.0, "full_width": 311.0, "full_height": 700.0, "page_width": 660.0, "page_height": 760.0, "overview": true, "step_ids": [ "all", "barrier", "partial", "zero" ] }, "diagram_title": "A6 · bit-state machine", "diagram_block_label": "A6 STATE", "diagram_description": "The same integer carries two explicit protocols.", "diagram_phase_labels": [ "ZERO / PARTIAL / COMPLETE / CLEAR" ] } ], "steps": [], "spread_group": "", "spread_label": "A6 STATE — zero, partial, ready and barrier release.", "spread_columns": 1, "spread_index": 1, "spread_count": 1, "page_orientation": "portrait" }, { "id": "section-5-content", "index": 5, "title": "A7 — Runtime", "show_heading": false, "toc_entry": true, "header_html": "
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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET6/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
GITEA  https://zsl-gitea.mpabi.pl/edu-freertos-c/lab-rv32i-freertos-c-event-groups
HTML  https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f
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", "content_html": "", "tasks": [], "assets": [ { "label": "fig:a7-runtime", "logical_label": "fig:a7-runtime", "figure_number": 5, "caption": "A7 RUNTIME — event value and waiting TCBs. — część 1/1 (r1 c1)", "alt": "Runtime EventGroup.", "href": "figures/a7-runtime.svg", "source_href": "figures/a7-runtime.puml", "width": 1.0, "kind": "diagram", "interactive": { "kind": "uml-class", "storage_key": "fc09-a7-runtime-tile-1", "title": "A7 · runtime evidence", "task": { "id": "task01", "label": "Task01 · EventGroup" }, "block": { "id": "a7", "label": "A7 RUNTIME", "description": "One handle, two wait masks, three stacks and one canonical log." }, "phases": [ { "id": "runtime", "label": "GROUP / TCB / STACK / LOG", "steps": [ { "id": "group", "number": 1, "label": "real group handle", "mode": "RUN", "event_id": "E01", "strategy_ref": "run.ready", "svg_label": "01", "code_ref": "src/tasks/task01_event_groups.c:261", "snapshot_ref": "task01.config", "description": "Persistent kernel object.", "evidence": "non-null handle.", "strategy": { "id": "task01/a7/runtime/group", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "bits", "number": 2, "label": "value evolves by API calls", "mode": "RUN", "event_id": "E05", "strategy_ref": "run.ready", "svg_label": "02", "code_ref": "src/tasks/task01_event_groups.c:175", "snapshot_ref": "task01.partial", "description": "No shadow counter.", "evidence": "0x11.", "strategy": { "id": "task01/a7/runtime/bits", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "c", "number": 3, "label": "coordinator has distinct stack", "mode": "RUN", "event_id": "E02", "strategy_ref": "run.ready", "svg_label": "03", "code_ref": "src/tasks/task01_event_groups.c:95", "snapshot_ref": "task01.coordinator-wait", "description": "Blocked context preserved.", "evidence": "coordinator_sp.", "strategy": { "id": "task01/a7/runtime/c", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "a", "number": 4, "label": "A waits at barrier", "mode": "RUN", "event_id": "E05", "strategy_ref": "run.ready", "svg_label": "04", "code_ref": "src/tasks/task01_event_groups.c:176", "snapshot_ref": "task01.partial", "description": "Public eBlocked proof.", "evidence": "worker_a_sp.", "strategy": { "id": "task01/a7/runtime/a", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "b", "number": 5, "label": "B provides final bit", "mode": "RUN", "event_id": "E10", "strategy_ref": "run.barrier", "svg_label": "05", "code_ref": "src/tasks/task01_event_groups.c:190", "snapshot_ref": "task01.b-release", "description": "Third stack.", "evidence": "worker_b_sp.", "strategy": { "id": "task01/a7/runtime/b", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } }, { "id": "log", "number": 6, "label": "commit-last bounded evidence", "mode": "RUN", "event_id": "E11", "strategy_ref": "run.pass", "svg_label": "06", "code_ref": "src/tasks/task01_event_groups.c:55", "snapshot_ref": "task01.pass", "description": "Exact E01–E11.", "evidence": "digest.", "strategy": { "id": "task01/a7/runtime/log", "kind": "run", "action": "replay", "expected_observations": [ "PASS=1", "11 committed records" ], "assertions": [ "three-run deterministic", "distinct stacks" ], "evidence_fields": [ "PASS", "digest", "hashes", "timestamp" ], "prerequisites": [ "all participants done" ], "layout": [ "PASS", "bounded log", "digest" ], "commands": [ "print g_fc09_pass", "print g_fc09.evidence_digest" ], "template_id": "run.pass" } } ] } ] }, "tile": { "index": 1, "count": 1, "row": 1, "column": 1, "rows": 1, "columns": 1, "x": 0.0, "y": 0.0, "width": 708.0, "height": 346.0, "full_x": 0.0, "full_y": 0.0, "full_width": 708.0, "full_height": 346.0, "page_width": 940.0, "page_height": 560.0, "overview": true, "step_ids": [ "a", "b", "bits", "c", "group", "log" ] }, "diagram_title": "A7 · runtime evidence", 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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET7/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
GITEA  https://zsl-gitea.mpabi.pl/edu-freertos-c/lab-rv32i-freertos-c-event-groups
HTML  https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f
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", "content_html": "", "tasks": [], "assets": [ { "label": "fig:a8-patterns", "logical_label": "fig:a8-patterns", "figure_number": 6, "caption": "A8 PATTERNS — ANY, ALL, consume and barrier. — część 1/1 (r1 c1)", "alt": "Wzorce EventGroup.", "href": "figures/a8-patterns.svg", "source_href": "figures/a8-patterns.puml", "width": 1.0, "kind": "diagram", "interactive": { "kind": "uml-class", "storage_key": "fc09-a8-patterns-tile-1", "title": "A8 · event synchronization choices", "task": { "id": "task01", "label": "Task01 · EventGroup" }, "block": { "id": "a8", "label": "A8 PATTERNS", "description": "Choose bit protocol semantics explicitly." }, "phases": [ { "id": "patterns", "label": "ANY / ALL / CLEAR / SYNC", "steps": [ { "id": "any", "number": 1, "label": "ANY releases on first selected bit", "mode": "CODE", "strategy_ref": "code.protocol", "svg_label": "01", "code_ref": "include/task01_event_groups.h:11", "description": "Useful for alternatives.", "evidence": "exercise variant.", "strategy": { "id": "task01/a8/patterns/any", "kind": "code", "action": "open", "expected_observations": [ "disjoint low-bit masks", "finite waits" ], "assertions": [ "READY_ALL=0x03", "SYNC_ALL=0x70" ], "evidence_fields": [ "mask", "API", "code_ref" ], "prerequisites": [ "źródło FC09" ], "layout": [ "mask table", "EventGroupExperiment", "kernel config" ], "commands": [ "rg -n 'READY_|SYNC_|xEventGroup' include src" ], "template_id": "code.protocol" } }, { "id": "all", "number": 2, "label": "ALL joins independent readiness", "mode": "RUN", "event_id": "E06", "strategy_ref": "run.ready", "svg_label": "02", "code_ref": "src/tasks/task01_event_groups.c:98", "snapshot_ref": "task01.ready-all", "description": "FC09 readiness contract.", "evidence": "0x03.", "strategy": { "id": "task01/a8/patterns/all", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "clear", "number": 3, "label": "clear consumes the readiness epoch", "mode": "RUN", "event_id": "E06", "strategy_ref": "run.ready", "svg_label": "03", "code_ref": "src/tasks/task01_event_groups.c:100", "snapshot_ref": "task01.ready-all", "description": "Old readiness is not retained.", "evidence": "final zero.", "strategy": { "id": "task01/a8/patterns/clear", "kind": "run", "action": "replay", "expected_observations": [ "partial=0x11", "A Blocked", "coordinator still Blocked" ], "assertions": [ "ALL not satisfied by READY_A", "reserved bits unused" ], "evidence_fields": [ "bits", "state", "PC", "SP", "timestamp" ], "prerequisites": [ "clean Hazard3 RAM" ], "layout": [ "group bits", "coordinator/A states", "event log" ], "commands": [ "print g_fc09.partial_bits", "print g_fc09.worker_a_state_at_partial" ], "template_id": "run.ready" } }, { "id": "sync", "number": 4, "label": "sync is a reusable barrier", "mode": "RUN", "event_id": "E10", "strategy_ref": "run.barrier", "svg_label": "04", "code_ref": "src/tasks/task01_event_groups.c:190", "snapshot_ref": "task01.b-release", "description": "Set own bit and wait ALL atomically.", "evidence": "three 0x70 results.", "strategy": { "id": "task01/a8/patterns/sync", "kind": "run", "action": "replay", "expected_observations": [ "all contain 0x70", "final=0" ], "assertions": [ "each participant syncs once", "auto clear" ], "evidence_fields": [ "result masks", "final bits", "order" ], "prerequisites": [ "READY_ALL consumed" ], "layout": [ "three sync results", "final group bits" ], "commands": [ "print/x g_fc09.sync_a_result", "print/x g_fc09.sync_b_result", "print/x g_fc09.sync_c_result" ], "template_id": "run.barrier" } } ] } ] }, "tile": { "index": 1, "count": 1, "row": 1, "column": 1, "rows": 1, "columns": 1, "x": 0.0, "y": 0.0, "width": 438.0, "height": 433.0, "full_x": 0.0, "full_y": 0.0, "full_width": 438.0, "full_height": 433.0, "page_width": 940.0, "page_height": 560.0, "overview": true, "step_ids": [ "all", "any", "clear", "sync" ] }, "diagram_title": "A8 · event synchronization choices", "diagram_block_label": "A8 PATTERNS", "diagram_description": "Choose bit protocol semantics explicitly.", "diagram_phase_labels": [ "ANY / ALL / CLEAR / SYNC" ] } ], "steps": [], "spread_group": "", "spread_label": "A8 PATTERNS — ANY, ALL, consume and barrier.", "spread_columns": 1, "spread_index": 1, "spread_count": 1, "page_orientation": "landscape" }, { "id": "section-7-task01", "index": 7, "title": "Task01 — EventGroup", "show_heading": true, "toc_entry": true, "header_html": "
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TITLEEvent Groups: ALL-ready i bariera
VER.v00.01
DATETIME2026-07-19T00:00:00+02:00
PROJECTFreestanding C nad FreeRTOS
SERIESFreeRTOS C
CARD09/15
SHEET8/8
SUBJ.Inf.
PROG.—
CORE—
SCOPE—
LEVEL—
POS.—
GITEA UUIDe5c4c0f3-3dd0-5168-9945-14d48744ec6fCARD UUID3f4c1b8b-d54b-58d5-b92d-87a7233cbd9fAUTHOR  M. Pabiszczak
GITEA  https://zsl-gitea.mpabi.pl/edu-freertos-c/lab-rv32i-freertos-c-event-groups
HTML  https://dce7fb9d-7b2f-5d49-96a2-3a30d3070b84.mpabi.pl/3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f
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", "left_margin_html": "
TECH
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", "right_margin_html": "
OG
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", "content_html": "", "tasks": [ { "ref": "task01", "title": "ALL-ready i trzyosobowa bariera", "uuid": "3f4c1b8b-d54b-58d5-b92d-87a7233cbd9f", "criterion": "PASS; partial=0x11; READY result contains 0x03; all SYNC results contain 0x70; final=0; deterministic digest.", "conclusion_html": "

EventGroup przechowuje bity stanu protokołu, nie historię zdarzeń. Rozłączne maski i jawne reguły clear są warunkiem poprawnej synchronizacji.

", "prompt_html": "

Przejdź po A2, A4, A5, A6, A7 i A8. Odtwórz E01–E11 i udowodnij, że maska częściowa nie zwalnia tasków, a bariera zwalnia wszystkich dokładnie raz.

", "flow": [ { "id": "predict", "kind": "block", "title": "A — mask table", "content_html": "

Przypisz READY i SYNC do właścicieli.

", "steps": [ { "id": "partial", "title": "Przewidź 0x11.", "content_html": "

Wskaż, które taski muszą być Blocked.

" }, { "id": "clear", "title": "Przewidź final zero.", "content_html": "

Rozdziel clear-on-exit od barrier auto-clear.

" } ] }, { "id": "replay", "kind": "block", "title": "B — replay Hazard3", "content_html": "

RUN zaczyna się od czystej RAM.

", "steps": [ { "id": "ready", "title": "Zbadaj E02–E06.", "content_html": "

Porównaj maski i task states.

" }, { "id": "barrier", "title": "Zbadaj E07–E10.", "content_html": "

Porównaj trzy wartości zwrotne.

" }, { "id": "pass", "title": "Zbadaj E11.", "content_html": "

Zapisz final bits, SP, PASS i digest.

" } ] }, { "id": "any-all", "kind": "exercise", "title": "Ćwiczenie — ANY kontra ALL", "content_html": "", "steps": [] } ] } ], "assets": [], "steps": [], "spread_group": "", "spread_label": "", "spread_columns": 1, "spread_index": 1, "spread_count": 1, "page_orientation": "portrait" } ], "viewpoints": [ { "id": "A1", "label": "CONTEXT", "subtitle": "Granice", "status": "unavailable", "reason": "Bez nowej granicy sprzętowej lub callbacku.", "target_id": "" }, { "id": "A2", "label": "STRUCTURE", "subtitle": "EventGroup, masks i participants", "status": "enabled", "target_label": "fig:a2-structure", "target_id": "fig-a2-structure" }, { "id": "A3", "label": "DISPATCH", "subtitle": "Binding", "status": "unavailable", "reason": "Task-context EventGroup nie wprowadza callbacku.", "target_id": "" }, { "id": "A4", "label": "APPLICATION", "subtitle": "Coordinator, A, B, verifier", "status": "enabled", "target_label": "fig:a4-application", "target_id": "fig-a4-application" }, { "id": "A5", "label": "FLOW", "subtitle": "E01–E11", "status": "enabled", "target_label": "fig:a5-flow", "target_id": "fig-a5-flow" }, { "id": "A6", "label": "STATE", "subtitle": "Bit value i blocked tasks", "status": "enabled", "target_label": "fig:a6-state", "target_id": "fig-a6-state" }, { "id": "A7", "label": "RUNTIME", "subtitle": "Handle, wait lists, stacks, digest", "status": "enabled", "target_label": "fig:a7-runtime", "target_id": "fig-a7-runtime" }, { "id": "A8", "label": "PATTERNS", "subtitle": "ANY, ALL, clear i barrier", "status": "enabled", "target_label": "fig:a8-patterns", "target_id": "fig-a8-patterns" } ], "has_spread": false, "has_allocator_model": false, "dictionary": null, "toc": [ { "id": "section-1-content", "label": "1. A2 — Structure" }, { "id": "section-2-content", "label": "2. A4 — Application" }, { "id": "section-3-content", "label": "3. A5 — Flow" }, { "id": "section-4-content", "label": "4. A6 — State" }, { "id": "section-5-content", "label": "5. A7 — Runtime" }, { "id": "section-6-content", "label": "6. A8 — Patterns" }, { "id": "section-7-task01", "label": "7. Task01 — EventGroup" } ] }