Print UTF-8 SI suffix only when allowed by the locale

[lttng-tools.git] / src / common / time.h

diff --git a/src/common/time.h b/src/common/time.h
index 81770779bdc90a898b1fefe1bbb8f88ef2d604fd..894ab9259a135a3f7816d74e3475d268ec328b13 100644 (file)
--- a/src/common/time.h
+++ b/src/common/time.h
@@ -19,9 +19,34 @@
 #ifndef LTTNG_TIME_H
 #define LTTNG_TIME_H
 
+#include <time.h>
+#include <stdbool.h>
+
 #define MSEC_PER_SEC   1000ULL
 #define NSEC_PER_SEC   1000000000ULL
 #define NSEC_PER_MSEC  1000000ULL
 #define NSEC_PER_USEC  1000ULL
 
+bool locale_supports_utf8(void);
+
+#define NSEC_UNIT       "ns"
+#define USEC_UNIT       (locale_supports_utf8() ? "µs" : "us")
+#define MSEC_UNIT       "ms"
+#define SEC_UNIT        "s"
+#define MIN_UNIT        "m"
+#define HR_UNIT         "h"
+
+/*
+ * timespec_to_ms: Convert timespec to milliseconds.
+ *
+ * Returns 0 on success, else -1 on error. errno is set to EOVERFLOW if
+ * input would overflow the output in milliseconds.
+ */
+int timespec_to_ms(struct timespec ts, unsigned long *ms);
+
+/*
+ * timespec_abs_diff: Absolute difference between timespec.
+ */
+struct timespec timespec_abs_diff(struct timespec ts_a, struct timespec ts_b);
+
 #endif /* LTTNG_TIME_H */