added ringbuffer and time utils

Signed-off-by: Thierry Bultel <thierry.bultel@iot.bzh>

1 files changed, 17 insertions, 0 deletions

diff --git a/plugins/alsa/time_utils.c b/plugins/alsa/time_utils.c
new file mode 100644
index 0000000..6f22e9d
--- /dev/null
+++ b/plugins/alsa/time_utils.c
@@ -0,0 +1,17 @@
+#include "time_utils.h"
+#include "time.h"
+
+__thread uint64_t last = 0;
+
+uint64_t now_monotonic_usec() {
+	struct timespec now;
+	clock_gettime(CLOCK_MONOTONIC, &now);
+	return now.tv_sec*1000000+now.tv_nsec/1000;
+}
+
+uint64_t ts() {
+	uint64_t now = now_monotonic_usec();
+	uint64_t elapsed = now-last;
+	last = now;
+	return elapsed;
+}