fixed hardware_db and improved stability and robustness of generic sal

src/sal/traits.rs

@@ -49,8 +49,17 @@ impl<T: PreflightAuditor + ?Sized> PreflightAuditor for Arc<T> {
 
 /// Suppresses conflicting daemons (tlp, thermald).
 pub trait EnvironmentGuard: Send + Sync {
-    fn suppress(&mut self) -> Result<()>;
-    fn restore(&mut self) -> Result<()>;
+    fn suppress(&self) -> Result<()>;
+    fn restore(&self) -> Result<()>;
+}
+
+impl<T: EnvironmentGuard + ?Sized> EnvironmentGuard for Arc<T> {
+    fn suppress(&self) -> Result<()> {
+        (**self).suppress()
+    }
+    fn restore(&self) -> Result<()> {
+        (**self).restore()
+    }
 }
 
 /// Read-only interface for standardized metrics.
@@ -97,15 +106,23 @@ impl<T: ActuatorBus + ?Sized> ActuatorBus for Arc<T> {
 
 /// Concurrent monitor for catastrophic states.
 pub trait HardwareWatchdog: Send + Sync {
-    fn check_emergency(&self) -> Result<bool>;
+    fn get_safety_status(&self) -> Result<SafetyStatus>;
 }
 
 impl<T: HardwareWatchdog + ?Sized> HardwareWatchdog for Arc<T> {
-    fn check_emergency(&self) -> Result<bool> {
-        (**self).check_emergency()
+    fn get_safety_status(&self) -> Result<SafetyStatus> {
+        (**self).get_safety_status()
     }
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum SafetyStatus {
+    Nominal,
+    Warning(String),
+    Critical(String),
+    EmergencyAbort(String),
+}
+
 /// Aggregate trait for a complete platform implementation.
 pub trait PlatformSal: PreflightAuditor + SensorBus + ActuatorBus + EnvironmentGuard + HardwareWatchdog {}