FInterchangeTaskSystem::WaitUntilTasksComplete

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Description

Wait can be call only on game thread. Async thread wait can create dead lock by using all the thread resources.

The caller have some restriction to follow

• This must be a safe place for any game thread task that will be executing during the wait.
• Wait should be call from a engine tick and no lock (like the global UObject locks) should be taken before calling wait.
• Slate ui callback are safe
• Engine tick is safe, use FTSTicker::GetCoreTicker() when you can
• Wait should not happen from a package/asset load call stack
• Wait should not happen from a save package/asset call stack
• Wait should not happen from a garbage collect call stack

If your system need to wait and you already have some locks or you are under a unsafe place you need to redesign your system to move the wait before you get to a unsafe call stack place to wait.

void WaitUntilTasksComplete  
(  
    const TArray < uint64 > & TasksToComplete  
)  
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void WaitUntilTasksComplete (     const TArray < uint64 > & TasksToComplete )