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avoiding deadlocks

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Dmugetsu 2025-05-29 11:22:35 -06:00 committed by Dmugetsu
parent 8a4eb9ef7a
commit 8beb7a792a
1 changed files with 13 additions and 8 deletions
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21
src/core/libraries/videoout/driver.cpp
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@ -311,16 +311,21 @@ void VideoOutDriver::PresentThread(std::stop_token token) {
}
} else {
Flip(request);
{
std::scoped_lock lock{request.port->port_mutex};
request.port->flip_status.flip_pending_num--;
if (request.eop) {
request.port->flip_status.gc_queue_num--;
// add second request to avoid potential deadlocks
const auto second = receive_request();
if (second) {
Flip(second);
{
std::scoped_lock lock{second.port->port_mutex};
second.port->flip_status.flip_pending_num--;
if (second.eop) {
second.port->flip_status.gc_queue_num--;
}
second.port->vo_cv
.notify_all(); // wake up threads waiting to submit more flips
}
request.port->vo_cv
.notify_one(); // this wake up threads waiting to submit more flips
FRAME_END;
}
FRAME_END;
}
}