avmedia/source/vlc/inc/wrapper/ThreadsafeQueue.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  19 #ifndef INCLUDED_AVMEDIA_SOURCE_VLC_INC_WRAPPER_THREADSAFEQUEUE_HXX
  20 #define INCLUDED_AVMEDIA_SOURCE_VLC_INC_WRAPPER_THREADSAFEQUEUE_HXX
  21 #include <queue>
  22 #include <iostream>
  23 #include <osl/mutex.hxx>
  24 #include <osl/conditn.hxx>
  25
  26 namespace avmedia
  27 {
  28 namespace vlc
  29 {
  30 namespace wrapper
  31 {
  32 template<class T>
  33 class ThreadsafeQueue
  34 {
  35 public:
  36     ThreadsafeQueue(const ThreadsafeQueue&) = delete;
  37     const ThreadsafeQueue& operator=(const ThreadsafeQueue&) = delete;
  38
  39     ThreadsafeQueue();
  40
  41     void push( const T& data );
  42     void pop( T& data );
  43
  44 private:
  45     std::queue< T > mQueue;
  46     mutable ::osl::Mutex mMutex;
  47     ::osl::Condition mCondition;
  48 };
  49
  50 template<class T>
  51 ThreadsafeQueue<T>::ThreadsafeQueue()
  52 {
  53 }
  54
  55 template<class T>
  56 void ThreadsafeQueue<T>::push( const T& data )
  57 {
  58     ::osl::MutexGuard guard( mMutex );
  59     mQueue.push( data );
  60     mMutex.release();
  61     mCondition.set();
  62 }
  63
  64 template<class T>
  65 void ThreadsafeQueue<T>::pop( T& data )
  66 {
  67     mCondition.wait();
  68     ::osl::MutexGuard guard( mMutex );
  69     while ( mQueue.empty() )
  70     {
  71         mMutex.release();
  72         mCondition.wait();
  73         mMutex.acquire();
  74     }
  75     data = mQueue.front();
  76     mQueue.pop();
  77 }
  78 }
  79 }
  80 }
  81
  82 #endif
  83 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */