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Fix deadlock with Driver::write

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Use a spin lock to recheck the queue size until it has room to push.
This commit is contained in:
Kyle Schwarz
2020-08-14 16:57:52 -04:00
parent afda617894
commit 4cd897badd
6 changed files with 2 additions and 13 deletions
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include/icsneo/communication/driver.h
-6
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@@ -22,10 +22,6 @@ public:
virtual bool read(std::vector<uint8_t>& bytes, size_t limit = 0);
virtual bool readWait(std::vector<uint8_t>& bytes, std::chrono::milliseconds timeout = std::chrono::milliseconds(100), size_t limit = 0);
virtual bool write(const std::vector<uint8_t>& bytes);
inline void onWrite() {
if(writeQueue.size_approx() < (writeQueueSize * 3/4))
writeCV.notify_one();
}
device_eventhandler_t report;
@@ -47,8 +43,6 @@ protected:
virtual void writeTask() = 0;
moodycamel::BlockingConcurrentQueue<uint8_t> readQueue;
moodycamel::BlockingConcurrentQueue<WriteOperation> writeQueue;
std::mutex writeMutex;
std::condition_variable writeCV;
std::thread readThread, writeThread;
std::atomic<bool> closing{false};
};