lib/core: intro `Float::sleep`

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/core/time.nit b/lib/core/time.nit
index 6c99016..5fc37f2 100644 (file)
--- a/lib/core/time.nit
+++ b/lib/core/time.nit
@@ -32,6 +32,16 @@ redef class Sys
        `}
 end
 
+redef class Float
+       # Sleep approximately `self` seconds
+       fun sleep `{
+               time_t s = self;
+               long ns = (self-s) * 1000000000.0;
+               const struct timespec req = {s, ns};
+               nanosleep(&req, NULL);
+       `}
+end
+
 # Time since epoch
 extern class TimeT `{time_t`}