diff options
Diffstat (limited to 'src/mscorlib/src/System/Threading/Timer.cs')
| -rw-r--r-- | src/mscorlib/src/System/Threading/Timer.cs | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/mscorlib/src/System/Threading/Timer.cs b/src/mscorlib/src/System/Threading/Timer.cs index 960f815d64..a5c7945864 100644 --- a/src/mscorlib/src/System/Threading/Timer.cs +++ b/src/mscorlib/src/System/Threading/Timer.cs @@ -265,7 +265,19 @@ namespace System.Threading if (timer.m_period != Timeout.UnsignedInfinite) { timer.m_startTicks = nowTicks; - timer.m_dueTime = timer.m_period; + uint elapsedForNextDueTime = elapsed - timer.m_dueTime; + if (elapsedForNextDueTime < timer.m_period) + { + // Discount the extra amount of time that has elapsed since the previous firing time to + // prevent timer ticks from drifting + timer.m_dueTime = timer.m_period - elapsedForNextDueTime; + } + else + { + // Enough time has elapsed to fire the timer yet again. The timer is not able to keep up + // with the short period, have it fire 1 ms from now to avoid spinning without a delay. + timer.m_dueTime = 1; + } // // This is a repeating timer; schedule it to run again. |