1 files changed, 73 insertions, 0 deletions
diff --git a/src/clocks.c b/src/clocks.c
new file mode 100644
index 00000000..c90a07c2
--- /dev/null
+++ b/src/clocks.c
@@ -0,0 +1,73 @@
+#include "common.h"
+
+#ifndef HAVE_CLOCK_GETTIME
+inline int clock_gettime(clockid_t clk_id, struct timespec *ts) {
+    struct timeval tv;
+    if(unlikely(gettimeofday(&tv, NULL) == -1))
+        return -1;
+    ts->tv_sec = tv.tv_sec;
+    ts->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
+    return 0;
+}
+#endif
+
+inline time_t now_realtime_sec(void) {
+    struct timespec ts;
+    if(unlikely(clock_gettime(CLOCK_REALTIME, &ts) == -1))
+        return 0;
+    return ts.tv_sec;
+}
+
+inline int now_realtime_timeval(struct timeval *tv) {
+    struct timespec ts;
+    if(unlikely(clock_gettime(CLOCK_REALTIME, &ts) == -1))
+        return -1;
+    tv->tv_sec = ts.tv_sec;
+    tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+    return 0;
+}
+
+inline usec_t now_realtime_usec(void) {
+    struct timespec ts;
+    if(unlikely(clock_gettime(CLOCK_REALTIME, &ts) == -1))
+        return 0;
+    return (usec_t)ts.tv_sec * USEC_PER_SEC + ts.tv_nsec / NSEC_PER_USEC;
+}
+
+inline time_t now_monotonic_sec(void) {
+    struct timespec ts;
+    if(unlikely(clock_gettime(CLOCK_MONOTONIC, &ts) == -1))
+        return 0;
+    return ts.tv_sec;
+}
+
+inline usec_t now_monotonic_usec(void) {
+    struct timespec ts;
+    if(unlikely(clock_gettime(CLOCK_MONOTONIC, &ts) == -1))
+        return 0;
+    return (usec_t)ts.tv_sec * USEC_PER_SEC + ts.tv_nsec / NSEC_PER_USEC;
+}
+
+inline time_t now_boottime_sec(void) {
+    struct timespec ts;
+    if(unlikely(clock_gettime(CLOCK_BOOTTIME, &ts) == -1))
+        return 0;
+    return ts.tv_sec;
+}
+
+inline usec_t now_boottime_usec(void) {
+    struct timespec ts;
+    if(unlikely(clock_gettime(CLOCK_BOOTTIME, &ts) == -1))
+        return 0;
+    return (usec_t)ts.tv_sec * USEC_PER_SEC + ts.tv_nsec / NSEC_PER_USEC;
+}
+
+inline usec_t timeval_usec(struct timeval *tv) {
+    return (usec_t)tv->tv_sec * USEC_PER_SEC + tv->tv_usec;
+}
+
+inline usec_t dt_usec(struct timeval *now, struct timeval *old) {
+    usec_t ts1 = timeval_usec(now);
+    usec_t ts2 = timeval_usec(old);
+    return (ts1 > ts2) ? (ts1 - ts2) : (ts2 - ts1);
+}