Metadata: add env fields to ease life of viewer

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

diff --git a/src/common/time.h b/src/common/time.h
index 81770779bdc90a898b1fefe1bbb8f88ef2d604fd..7e760599fd54ba6c2f0f8c2e400b5c4e00f1e0d1 100644 (file)
--- a/src/common/time.h
+++ b/src/common/time.h
@@ -19,9 +19,55 @@
 #ifndef LTTNG_TIME_H
 #define LTTNG_TIME_H
 
-#define MSEC_PER_SEC   1000ULL
-#define NSEC_PER_SEC   1000000000ULL
-#define NSEC_PER_MSEC  1000000ULL
-#define NSEC_PER_USEC  1000ULL
+#include <time.h>
+#include <stdbool.h>
+#include <common/macros.h>
+
+#define MSEC_PER_SEC    1000ULL
+#define NSEC_PER_SEC    1000000000ULL
+#define NSEC_PER_MSEC   1000000ULL
+#define NSEC_PER_USEC   1000ULL
+#define USEC_PER_SEC    1000000ULL
+#define USEC_PER_MSEC   1000ULL
+
+#define SEC_PER_MINUTE  60ULL
+#define MINUTE_PER_HOUR 60ULL
+
+#define USEC_PER_MINUTE (USEC_PER_SEC * SEC_PER_MINUTE)
+#define USEC_PER_HOURS  (USEC_PER_MINUTE * MINUTE_PER_HOUR)
+
+LTTNG_HIDDEN
+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"
+
+#define ISO8601_FORMAT  "%Y%m%dT%H%M%S%z"
+#define ISO8601_LEN     21
+
+/*
+ * 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.
+ */
+LTTNG_HIDDEN
+int timespec_to_ms(struct timespec ts, unsigned long *ms);
+
+/*
+ * timespec_abs_diff: Absolute difference between timespec.
+ */
+LTTNG_HIDDEN
+struct timespec timespec_abs_diff(struct timespec ts_a, struct timespec ts_b);
+
+/*
+ * Format time_t to ISO8601 compatible format.
+ */
+LTTNG_HIDDEN
+int time_t_to_ISO8601(char *s, size_t s_size, time_t time);
 
 #endif /* LTTNG_TIME_H */