Add time_update().

src/time.c

@@ -0,0 +1,36 @@
+#include "jemalloc/internal/jemalloc_internal.h"
+
+bool
+time_update(struct timespec *time)
+{
+	struct timespec old_time;
+
+	memcpy(&old_time, time, sizeof(struct timespec));
+
+#ifdef _WIN32
+	FILETIME ft;
+	uint64_t ticks;
+	GetSystemTimeAsFileTime(&ft);
+	ticks = (ft.dwHighDateTime << 32) | ft.dWLowDateTime;
+	time->tv_sec = ticks / 10000;
+	time->tv_nsec = ((ticks % 10000) * 100);
+#elif JEMALLOC_CLOCK_GETTIME
+	if (sysconf(_SC_MONOTONIC_CLOCK) > 0)
+		clock_gettime(CLOCK_MONOTONIC, time);
+	else
+		clock_gettime(CLOCK_REALTIME, time);
+#else
+	struct timeval tv;
+	gettimeofday(&tv, NULL);
+	time->tv_sec = tv.tv_sec;
+	time->tv_nsec = tv.tv_usec * 1000;
+#endif
+
+	/* Handle non-monotonic clocks. */
+	if (unlikely(old_time.tv_sec > time->tv_sec))
+		return (true);
+	if (unlikely(old_time.tv_sec == time->tv_sec))
+		return old_time.tv_nsec > time->tv_nsec;
+
+	return (false);
+}