# You are allowed to redistribute it and sell it, alone or is a part of
# another product.
-# Provides the Clock utility class to keep time of real time flow
+# Services to keep time of the wall clock time
module realtime is ldflags "-lrt"
in "C header" `{
#include <time.h>
`}
+in "C" `{
+
+#ifdef __MACH__
+/* OS X does not have clock_gettime, mascarade it and use clock_get_time
+ * cf http://stackoverflow.com/questions/11680461/monotonic-clock-on-osx
+*/
+#include <mach/clock.h>
+#include <mach/mach.h>
+#define CLOCK_REALTIME CALENDAR_CLOCK
+#define CLOCK_MONOTONIC SYSTEM_CLOCK
+void clock_gettime(clock_t clock_name, struct timespec *ts) {
+ clock_serv_t cclock;
+ mach_timespec_t mts;
+ host_get_clock_service(mach_host_self(), clock_name, &cclock);
+ clock_get_time(cclock, &mts);
+ mach_port_deallocate(mach_task_self(), cclock);
+ ts->tv_sec = mts.tv_sec;
+ ts->tv_nsec = mts.tv_nsec;
+}
+#endif
+`}
+
# Elapsed time representation.
extern class Timespec `{struct timespec*`}
return self->tv_nsec;
`}
- # Seconds in Float
- # Loss of precision but great to print
+ # Elapsed time in microseconds, with both whole seconds and the rest
+ #
+ # May cause an `Int` overflow, use only with a low number of seconds.
+ fun microsec: Int `{
+ return self->tv_sec*1000000 + self->tv_nsec/1000;
+ `}
+
+ # Elapsed time in milliseconds, with both whole seconds and the rest
+ #
+ # May cause an `Int` overflow, use only with a low number of seconds.
+ fun millisec: Int `{
+ return self->tv_sec*1000 + self->tv_nsec/1000000;
+ `}
+
+ # Number of seconds as a `Float`
+ #
+ # Incurs a loss of precision, but the result is pretty to print.
fun to_f: Float do return sec.to_f + nanosec.to_f / 1000000000.0
redef fun to_s do return "{to_f}s"
# Smallest time frame reported by clock
fun resolution : Timespec `{
struct timespec* tv = malloc( sizeof(struct timespec) );
+#ifdef __MACH__
+ clock_serv_t cclock;
+ int nsecs;
+ mach_msg_type_number_t count;
+ host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
+ clock_get_attributes(cclock, CLOCK_GET_TIME_RES, (clock_attr_t)&nsecs, &count);
+ mach_port_deallocate(mach_task_self(), cclock);
+ tv->tv_sec = 0;
+ tv->tv_nsec = nsecs;
+#else
clock_getres( CLOCK_MONOTONIC, tv );
+#endif
return tv;
`}
time_at_last_lapse = nt
return dt
end
+
+ # Seconds since the last call to `lapse`, without resetting the lapse counter
+ fun peek_lapse: Float
+ do
+ var nt = new Timespec.monotonic_now
+ var dt = nt - time_at_last_lapse
+ var r = dt.to_f
+ nt.free
+ dt.free
+ return r
+ end
end