F4.1: sincronización con herencia de prioridad (mutex + semáforo)#79
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Añade primitivas de sincronización al scheduler con herencia de prioridad para acotar la inversión de prioridad: - sched.rs: MutexCb/SemCb, estados BlockedMutex/BlockedSem, prioridad base vs efectiva, herencia (recompute_priority) en cada lock/unlock, API bloqueante (switch_until_ready) y no bloqueante (try_lock/try_wait), limpieza de propiedad/waiters en kill (release_task_sync). - syscall.rs: IDs 0x20-0x23 (MutexLock/Unlock, SemWait/Post), hooks, dispatch y trampolines SVC userland. - rugus-kernel: hooks + wrappers privilegiados cpu_* + sem_init + sync_selftest (autodiagnóstico no bloqueante en boot). - examples F407/F769: log "sync selftest: PASS" en arranque. - appliance F103: rechaza sync userland con Einval (sin multitarea). - host-tests: módulo sync_tests (herencia de prioridad + conteo de semáforo) y aserciones de dispatch. Validado: F407 y F769 reportan "sync selftest: PASS (mutex + semaphore)" por RTT; 20 tests host en verde; clippy/doc/fmt limpios en ambos targets. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Resumen
Primera unidad del roadmap F4 hacia un kernel maduro/industrial. Añade primitivas de sincronización con herencia de prioridad para acotar la inversión de prioridad.
mutex_lock/sem_wait) y no bloqueante (try_lock/try_wait).BlockedMutex/BlockedSem; limpieza de propiedad y máscaras de waiters enkill(release_task_sync) para evitar fugas/deadlock.0x20-0x23+ hooks + trampolines SVC userland.sync_selftestno bloqueante en boot (kernel) y wrappers privilegiadoscpu_*.Einval(sin multitarea).Validación
sync selftest: PASS (mutex + semaphore).sync selftest: PASS (mutex + semaphore).sync_tests: herencia de prioridad + conteo de semáforo).clippy/doc/fmtlimpios en thumbv7em y thumbv7m.Notas de diseño
MAX_TASKS=4.*_for_testporqueMockArch::switch_contextes no-op (la API bloqueante haría bucle infinito en host).🤖 Generated with Claude Code