Implement Queue#pop(timeout: sec)

[Feature #18774]

As well as `SizedQueue#pop(timeout: sec)`

If both `non_block=true` and `timeout:` are supplied, ArgumentError
is raised.

1 files changed, 10 insertions, 0 deletions

diff --git a/hrtime.h b/hrtime.h
index 4ac3d54723..80aff5deb3 100644
--- a/hrtime.h
+++ b/hrtime.h
@@ -36,6 +36,7 @@
 #define RB_HRTIME_PER_MSEC (RB_HRTIME_PER_USEC * (rb_hrtime_t)1000)
 #define RB_HRTIME_PER_SEC  (RB_HRTIME_PER_MSEC * (rb_hrtime_t)1000)
 #define RB_HRTIME_MAX      UINT64_MAX
+#define RB_HRTIME_MIN      ((rb_hrtime_t)0)
 
 /*
  * Lets try to support time travelers.  Lets assume anybody with a time machine
@@ -91,6 +92,15 @@ rb_hrtime_add(rb_hrtime_t a, rb_hrtime_t b)
     return c;
 }
 
+static inline rb_hrtime_t
+rb_hrtime_sub(rb_hrtime_t a, rb_hrtime_t b)
+{
+    if (a < b) {
+        return RB_HRTIME_MIN;
+    }
+    return a - b;
+}
+
 /*
  * convert a timeval struct to rb_hrtime_t, clamping at RB_HRTIME_MAX
  */