digitalmars.D.bugs - [Issue 15334] New: OS X core.time ticksPerSecond calculation is
- via Digitalmars-d-bugs (25/25) Nov 13 2015 https://issues.dlang.org/show_bug.cgi?id=15334
https://issues.dlang.org/show_bug.cgi?id=15334 Issue ID: 15334 Summary: OS X core.time ticksPerSecond calculation is incorrect Product: D Version: D2 Hardware: All OS: Mac OS X Status: NEW Severity: regression Priority: P1 Component: druntime Assignee: nobody puremagic.com Reporter: gorox comcast.net The _d_initMonoTime() version(OSX) calculation for ticksPerSecond is using a flipped mach_timebase_info ratio numer/denom when it should be denom/numer. Fortunately (or unfortunately depending on your point of view) it doesn't show up as a problem on Intel OS X Macs because numer and denom are both 1. On an iOS iPhone, wrong results would be produced because numer = 125 and denom = 3. The wrong calculation shows up here: https://github.com/D-Programming-Language/druntime/blob/master/src/core/time.d#L2639 This is a regression because the correct calculation shows up in the deprecated struct TickDuration here: https://github.com/D-Programming-Language/druntime/blob/master/src/core/time.d#L2954 --
Nov 13 2015