[RTEMS Project] #3121: clock() implementation in Newlib is broken

RTEMS trac trac at rtems.org
Thu Sep 7 05:40:57 UTC 2017


#3121: clock() implementation in Newlib is broken
-----------------------------+------------------------------
 Reporter:  Sebastian Huber  |       Owner:  joel.sherrill@…
     Type:  defect           |      Status:  new
 Priority:  normal           |   Milestone:  Indefinite
Component:  Newlib           |     Version:
 Severity:  normal           |  Resolution:
 Keywords:                   |
-----------------------------+------------------------------

Comment (by Sebastian Huber <sebastian.huber@…>):

 In [changeset:"bdbf1ffa6e81d75ab3ab7adc11e35b1ee1670c29/rtems"
 bdbf1ffa/rtems]:
 {{{
 #!CommitTicketReference repository="rtems"
 revision="bdbf1ffa6e81d75ab3ab7adc11e35b1ee1670c29"
 Implement clock()

 Newlib uses _times_r() in clock().  The problem is that the _times_r()
 clock frequency is defined by sysconf(_SC_CLK_TCK).  The clock frequency
 of clock() is the constant CLOCKS_PER_SEC.

 FreeBSD uses getrusage() for clock().  Since RTEMS has only one process,
 the implementation can be simplified.

 Update #3121.
 }}}

--
Ticket URL: <http://devel.rtems.org/ticket/3121#comment:1>
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