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task: Prevent "unexpected task state" when cancelling task sometimes

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rdb 2021-05-11 11:30:41 +02:00
parent 55fb14b792
commit 91a6ff1d81
1 changed files with 5 additions and 0 deletions
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5
panda/src/event/asyncFuture.cxx
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@ -315,6 +315,11 @@ wake_task(AsyncTask *task) {
task->_state = AsyncTask::S_servicing;
return;
case AsyncTask::S_active:
// It could have already been activated, such as by a cancel() which then
// indirectly caused the awaiting future to be cancelled. Do nothing.
return;
case AsyncTask::S_inactive:
// Schedule it immediately.
nassertv(task->_manager == nullptr);