Replace QMutex and condition QWaitCondition with std::

src/dotrunner.cpp

@@ -256,27 +256,26 @@ bool DotRunner::run()
 
 void DotRunnerQueue::enqueue(DotRunner *runner)
 {
-  QMutexLocker locker(&m_mutex);
+  std::lock_guard<std::mutex> locker(m_mutex);
   m_queue.push(runner);
-  m_bufferNotEmpty.wakeAll();
+  m_bufferNotEmpty.notify_all();
 }
 
 DotRunner *DotRunnerQueue::dequeue()
 {
-  QMutexLocker locker(&m_mutex);
-  while (m_queue.empty())
-  {
-    // wait until something is added to the queue
-    m_bufferNotEmpty.wait(&m_mutex);
-  }
+  std::unique_lock<std::mutex> locker(m_mutex);
+
+   // wait until something is added to the queue
+   m_bufferNotEmpty.wait(locker, [this]() {return !m_queue.empty(); });
+
   DotRunner *result = m_queue.front();
   m_queue.pop();
   return result;
 }
 
 uint DotRunnerQueue::count() const
 {
-  QMutexLocker locker(&m_mutex);
+  std::lock_guard<std::mutex> locker(m_mutex);
   return m_queue.size();
 }
 

src/dotrunner.h

@@ -18,10 +18,9 @@
 
 #include "qcstring.h"
 #include "qlist.h"
-#include "qwaitcondition.h"
 #include "qthread.h"
 #include <queue>
-#include "qmutex.h"
+#include <mutex>
 
 /** Minimal constant string class that is thread safe, once initialized. */
 class DotConstString
@@ -114,9 +113,9 @@ class DotRunnerQueue
     DotRunner *dequeue();
     uint count() const;
   private:
-    QWaitCondition    m_bufferNotEmpty;
+    std::condition_variable m_bufferNotEmpty;
     std::queue<DotRunner *> m_queue;
-    mutable QMutex    m_mutex;
+    mutable std::mutex    m_mutex;
 };
 
 /** Worker thread to execute a dot run */