move pool/queue management into the rf95 lib

src/rf95/PointerQueue.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "TypedQueue.h"
+
+/**
+ * A wrapper for freertos queues that assumes each element is a pointer
+ */
+template <class T> class PointerQueue : public TypedQueue<T *>
+{
+  public:
+    PointerQueue(int maxElements) : TypedQueue<T *>(maxElements) {}
+
+    // returns a ptr or null if the queue was empty
+    T *dequeuePtr(TickType_t maxWait = portMAX_DELAY)
+    {
+        T *p;
+
+        return this->dequeue(&p, maxWait) ? p : nullptr;
+    }
+
+    // returns a ptr or null if the queue was empty
+    T *dequeuePtrFromISR(BaseType_t *higherPriWoken)
+    {
+        T *p;
+
+        return this->dequeueFromISR(&p, higherPriWoken) ? p : nullptr;
+    }
+};