Added ring buffer log class.

1 files changed, 39 insertions, 0 deletions

diff --git a/util/rblog.h b/util/rblog.h
new file mode 100644
index 0000000..5914239
--- /dev/null
+++ b/util/rblog.h
@@ -0,0 +1,39 @@
+#ifndef RBLOG_H
+#define RBLOG_H
+
+#include <stdint.h>
+#include <os/time.h>
+
+template <uint32_t E, uint32_t A = 0>
+class RBLog {
+	private:
+		static const uint32_t num_entries = E;
+		static const uint32_t num_arguments = A;
+		
+		struct entry_t {
+			uint32_t timestamp;
+			const char* string;
+			uint32_t arguments[num_arguments];
+		};
+		
+		entry_t entries[num_entries];
+		uint32_t index;
+	
+	public:
+		RBLog() : index(0) {
+			for(entry_t& entry : entries) {
+				entry = {0, 0};
+			}
+		}
+		
+		template <typename... Arguments>
+		void log(const char* s, Arguments... a) {
+			entries[index] = {Time::time(), s, {a...}};
+			
+			if(++index >= num_entries) {
+				index = 0;
+			}
+		}
+};
+
+#endif