add fake counter driver for arch=posix

2 files changed, 34 insertions, 0 deletions

diff --git a/include/arch/posix/driver/counter.h b/include/arch/posix/driver/counter.h
new file mode 100644
index 0000000..6390d14
--- /dev/null
+++ b/include/arch/posix/driver/counter.h
@@ -0,0 +1,31 @@
+#include <stdint.h>
+#include <time.h>
+
+class Counter {
+	private:
+		Counter(const Counter &copy);
+		uint64_t start_sec, start_nsec;
+
+	public:
+		uint64_t value;
+		volatile uint8_t overflowed;
+
+		Counter() : overflowed(0) {}
+
+		inline void start() {
+			struct timespec ts;
+			clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
+			start_sec = ts.tv_sec;
+			start_nsec = ts.tv_nsec;
+		}
+
+		inline void stop() {
+			struct timespec ts;
+			clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
+
+			value = (ts.tv_sec - start_sec) * 1000000000UL;
+			value += ts.tv_nsec - start_nsec;
+		}
+};
+
+extern Counter counter;
diff --git a/src/arch/posix/driver/counter.cc b/src/arch/posix/driver/counter.cc
new file mode 100644
index 0000000..17a0f95
--- /dev/null
+++ b/src/arch/posix/driver/counter.cc
@@ -0,0 +1,3 @@
+#include "driver/counter.h"
+
+Counter counter;