CubicSDR/src/SDRThreadQueue.h

#pragma once

class SDRThreadTask
 {
 public:
   enum SDR_COMMAND
   {
     SDR_THREAD_EXIT=wxID_EXIT,
     SDR_THREAD_NULL=wxID_HIGHEST+1,
     SDR_THREAD_STARTED,
     SDR_THREAD_PROCESS,
     SDR_THREAD_ERROR, 
   };

   SDRThreadTask() : m_cmd(eID_THREAD_NULL) {}
   SDRThreadTask(SDR_COMMAND cmd, const wxString& arg) : m_cmd(cmd), m_Arg(arg) {}
   SDR_COMMAND m_cmd; 
   wxString m_Arg;
 };
 
 class SDRThreadQueue
   {
   public:
     enum SDR_PRIORITY { SDR_PRIORITY_HIGHEST, SDR_PRIORITY_HIGHER, SDR_PRIORITY_NORMAL, SDR_PRIORITY_BELOW_NORMAL, SDR_PRIORITY_LOW, SDR_PRIORITY_IDLE }; 
     SDRThreadQueue(wxEvtHandler* pParent) : m_pParent(pParent) {}
     void AddTask(const SDRThreadTask& task, const SDR_PRIORITY& priority=SDR_PRIORITY_NORMAL)
     {
       wxMutexLocker lock(m_MutexQueue);
       m_Tasks.insert(std::make_pair(priority, task));
       m_QueueCount.Post();
     }
     SDRThreadTask Pop()
     {
       SDRThreadTask element;
       m_QueueCount.Wait();
       m_MutexQueue.Lock();
       element=(m_Tasks.begin())->second;
       m_Tasks.erase(m_Tasks.begin());
       m_MutexQueue.Unlock();
       return element;
     }
     void Report(const SDRThreadTask::SDR_COMMAND& cmd, const wxString& sArg=wxEmptyString, int iArg=0)
     {
       wxCommandEvent evt(wxEVT_THREAD, cmd);
       evt.SetString(sArg);
       evt.SetInt(iArg);
       m_pParent->AddPendingEvent(evt);
     }
     size_t Stacksize()
     {
       wxMutexLocker lock(m_MutexQueue);
       return m_Tasks.size();
     }

   private:
     wxEvtHandler* m_pParent;
     std::multimap<tPRIORITY, SDRThreadTask> m_Tasks; 
     wxMutex m_MutexQueue;
     wxSemaphore m_QueueCount;
   };