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Provisional bug fix to avoid random channel state machine deadlock

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caused by an incorrect sequence of events
This commit is contained in:
Javier Arribas 2016-03-04 14:08:19 +01:00
parent 36c8db4143
commit 833ca8ab8c
1 changed files with 5 additions and 1 deletions
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6
src/core/receiver/gnss_flowgraph.cc
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@ -406,7 +406,11 @@ void GNSSFlowgraph::apply_action(unsigned int who, unsigned int what)
}
channels_.at(who)->set_signal(available_GNSS_signals_.front());
available_GNSS_signals_.pop_front();
//todo: This is a provisional bug fix to avoid random channel state machine deadlock caused by an incorrect sequence of events
// Correct sequence: start_acquisition() is triggered after the negative acquisition driven by the process_channel_messages() thread inside channel class
// Incorrect sequence: due to thread concurrency, some times start_acquisition is triggered BEFORE the last negative_acquisition notification, thus producing a deadlock
// a short delay here (5ms) apparently reduces the chances to enter in this deadlock
usleep(5000);
channels_.at(who)->start_acquisition();
break;