message: core(parallel_for): cleanup
  remove 'dont_wait' (can be replaced with has_wake_signal)
diff: @@ -197,7 +197,6 @@ public:
  volatile bool stop_thread;
  volatile bool has_wake_signal;
  - volatile bool dont_wait;
  Ptr<ParallelJob> job;
  @@ -213,8 +212,7 @@ public:
  posix_thread(0),
  is_created(false),
  stop_thread(false),
  - has_wake_signal(false),
  - dont_wait(false)
  + has_wake_signal(false)
  #if !defined(CV_USE_GLOBAL_WORKERS_COND_VAR)
  , isActive(true)
  #endif
  @@ -386,7 +384,7 @@ void WorkerThread::thread_body()
  while (!stop_thread)
  {
  - CV_LOG_VERBOSE(NULL, 5, "Thread: ... loop iteration: allow_active_wait=" << allow_active_wait << " has_wake_signal=" << has_wake_signal << " dont_wait=" << dont_wait );
  + CV_LOG_VERBOSE(NULL, 5, "Thread: ... loop iteration: allow_active_wait=" << allow_active_wait << " has_wake_signal=" << has_wake_signal);
  if (allow_active_wait && CV_WORKER_ACTIVE_WAIT > 0)
  {
  allow_active_wait = false;
  @@ -404,7 +402,7 @@ void WorkerThread::thread_body()
  #ifdef CV_PROFILE_THREADS
  stat.threadWait = getTickCount();
  #endif
  - while (!has_wake_signal && !dont_wait) // to handle spurious wakeups
  + while (!has_wake_signal) // to handle spurious wakeups
  {
  //CV_LOG_VERBOSE(NULL, 5, "Thread: wait (sleep) ...");
  #if defined(CV_USE_GLOBAL_WORKERS_COND_VAR)
  @@ -416,7 +414,6 @@ void WorkerThread::thread_body()
  #endif
  CV_LOG_VERBOSE(NULL, 5, "Thread: wake ... (has_wake_signal=" << has_wake_signal << " stop_thread=" << stop_thread << ")")
  }
  - dont_wait = false;
  #ifdef CV_PROFILE_THREADS
  stat.threadWake = getTickCount();
  #endif
  @@ -611,12 +608,11 @@ void ThreadPool::run(const Range& range, const ParallelLoopBody& body, double ns
  #if !defined(CV_USE_GLOBAL_WORKERS_COND_VAR)
  isActive = threads[i]->isActive;
  #endif
  - threads[i]->dont_wait = true;
  + threads[i]->has_wake_signal = true;
  #ifdef CV_PROFILE_THREADS
  threads_stat[i + 1].reset();
  #endif
  pthread_mutex_unlock(&threads[i]->mutex);
  - threads[i]->has_wake_signal = true;
  #if !defined(CV_USE_GLOBAL_WORKERS_COND_VAR)
  if (!isActive)
  {
  @@ -628,7 +624,6 @@ void ThreadPool::run(const Range& range, const ParallelLoopBody& body, double ns
  {
  CV_Assert(threads[i]->job.empty());
  threads[i]->job = job;
  - threads[i]->dont_wait = true;
  threads[i]->has_wake_signal = true;
  #ifdef CV_PROFILE_THREADS
  threads_stat[i + 1].reset();
  