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Avoid potential overflow for dynamic task priority.

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This commit is contained in:
Sönke Ludwig 2020-03-15 08:59:17 +01:00
parent 1f86470e4c
commit 280023dfc2
1 changed files with 2 additions and 2 deletions
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4
source/vibe/core/task.d
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@ -996,7 +996,7 @@ package struct TaskScheduler {
private void doYieldAndReschedule(Task task) private void doYieldAndReschedule(Task task)
{ {
auto tf = () @trusted { return task.taskFiber; } (); import std.algorithm.comparison : min;
// insert according to priority, limited to a priority // insert according to priority, limited to a priority
// factor of 1:10 in case of heavy concurrency // factor of 1:10 in case of heavy concurrency
@ -1006,7 +1006,7 @@ package struct TaskScheduler {
// increase dynamic priority each time a task gets overtaken to // increase dynamic priority each time a task gets overtaken to
// ensure a fair schedule // ensure a fair schedule
t.m_dynamicPriority += t.m_staticPriority; t.m_dynamicPriority += min(t.m_staticPriority, uint.max - t.m_dynamicPriority);
return false; return false;
}); });