Fixed graceful shutdown.

src/workers/Hashrate.cpp

@@ -161,6 +161,12 @@ void Hashrate::print()
 }
 
 
+void Hashrate::stop()
+{
+    uv_timer_stop(&m_timer);
+}
+
+
 void Hashrate::updateHighest()
 {
    double highest = calc(2500);

src/workers/Hashrate.h

@@ -37,6 +37,7 @@ public:
     double calc(size_t threadId, size_t ms) const;
     void add(size_t threadId, uint64_t count, uint64_t timestamp);
     void print();
+    void stop();
     void updateHighest();
 
     inline double highest() const { return m_highest; }

src/workers/Workers.cpp

@@ -115,6 +115,15 @@ void Workers::start(int64_t affinity)
 }
 
 
+void Workers::stop()
+{
+    uv_timer_stop(&m_timer);
+    m_hashrate->stop();
+
+    uv_close(reinterpret_cast<uv_handle_t*>(&m_async), nullptr);
+}
+
+
 void Workers::submit(const JobResult &result)
 {
     uv_mutex_lock(&m_mutex);

src/workers/Workers.h

@@ -46,6 +46,7 @@ public:
     static void setEnabled(bool enabled);
     static void setJob(const Job &job);
     static void start(int64_t affinity);
+    static void stop();
     static void submit(const JobResult &result);
 
     static inline bool isEnabled()                               { return m_enabled; }