Diff: History.h

Revision:

9:329af8cdc923

Child:

10:80850cd6c29e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/History.h	Tue Aug 25 22:18:21 2015 +0000
@@ -0,0 +1,50 @@
+#ifndef HISTORY_H
+#define HISTORY_H
+
+template<uint32_t BufferSize>
+class History {
+public:
+    History() : _head(0) {
+    }
+
+    ~History() {
+    }
+
+    void save(const uint64_t& data) {
+        _pool[_head++] = data;
+        _head %= BufferSize;
+    }
+
+    bool exist(const uint64_t& data) {
+        for(uint32_t i=0; i<BufferSize; i++) {
+            DBG("%llu == %llu\r\n", _pool[i], data);
+            if(_pool[i]==data) {
+                return true;
+            }
+        }
+        return false;
+    }
+    
+    uint64_t last() {
+        uint32_t prev = (_head-1+BufferSize)%BufferSize;
+        return _pool[prev];
+    }
+    
+    uint32_t last_ts() {
+        return (uint32_t) last();
+    }
+
+    /** Reset the buffer
+     *
+     */
+    void reset() {
+        _head = 0;
+    }
+
+private:
+    uint64_t _pool[BufferSize];
+    volatile uint32_t _head;
+};
+
+
+#endif
\ No newline at end of file