[mythtv-commits] Ticket #11255: Change MythTimer to use monotonic clock

[MythTV]

#11255: Change MythTimer to use monotonic clock
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 Reporter:  Rune Petersen <rune@…>  |          Owner:  danielk
     Type:  Patch - Feature         |         Status:  closed
 Priority:  minor                   |      Milestone:  unknown
Component:  MythTV - General        |        Version:  0.26-fixes
 Severity:  medium                  |     Resolution:  fixed
 Keywords:  performance             |  Ticket locked:  0
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Changes (by Daniel Thor Kristjansson <danielk@…>):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:440573f3febdc8009b74ae1b2366aa7d518a15a7/mythtv]:
 {{{
 #!CommitTicketReference repository="mythtv"
 revision="440573f3febdc8009b74ae1b2366aa7d518a15a7"
 Convert MythTimer to use QElapsedTimer instead of QTime.

 Fixes #11255.

 We initially created MythTimer because QTime isn't monotonic
 and we wanted a wrapper that assured that time wouldn't march
 backward too much. As of Qt 4.7 there is a timer available
 which is monotonic on most systems. This converts MythTimer
 to use this new timer.

 The first version of this new wrapper was written by
 Rune Petersen for the efficiency gains this has over
 QTime which does an expensive DST conversion internally.
 I added back a timer restart in the elapsed() method
 since QElapsedTimer doesn't always provide a monotonic
 timer, and I implemented the addMSecs() method so this
 could be used in all instances where the original
 MythTimer was used.
 }}}

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Ticket URL: <http://code.mythtv.org/trac/ticket/11255#comment:2>
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