add locks to PeriodicTask

src/PeriodicTask.h

@@ -1,11 +1,12 @@
 #pragma once
 
-#include <Arduino.h>
-#include "configuration.h"
+#include <cstdint>
+
+#include "lock.h"
 
 /**
  * A base class for tasks that want their doTask() method invoked periodically
- * 
+ *
  * FIXME: currently just syntatic sugar for polling in loop (you must call .loop), but eventually
  * generalize with the freertos scheduler so we can save lots of power by having everything either in
  * something like this or triggered off of an irq.
@@ -15,9 +16,10 @@ class PeriodicTask
     uint32_t lastMsec = 0;
     uint32_t period = 1; // call soon after creation
 
-public:
-    uint32_t periodMsec;
+    // Protects the above variables.
+    meshtastic::Lock lock;
 
+  public:
     virtual ~PeriodicTask() {}
 
     PeriodicTask(uint32_t initialPeriod = 1);
@@ -26,8 +28,12 @@ public:
     virtual void loop();
 
     /// Set a new period in msecs (can be called from doTask or elsewhere and the scheduler will cope)
-    void setPeriod(uint32_t p) { period = p; }
+    void setPeriod(uint32_t p)
+    {
+        meshtastic::LockGuard lg(&lock);
+        period = p;
+    }
 
-protected: 
+  protected:
     virtual void doTask() = 0;
 };