avmedia/source/vlc/wrapper/ThreadsafeQueue.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   9  * This file incorporates work covered by the following license notice:
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19 #ifndef _THREADSAFE_QUEUE_HXX
  20 #define _THREADSAFE_QUEUE_HXX
  21 #include <queue>
  22 #include <iostream>
  23 #include <osl/mutex.hxx>
  24 #include <osl/conditn.hxx>
  25 #include <boost/noncopyable.hpp>
  26
  27 namespace avmedia
  28 {
  29 namespace vlc
  30 {
  31 namespace wrapper
  32 {
  33 template<class T>
  34 class ThreadsafeQueue : boost::noncopyable
  35 {
  36 public:
  37     ThreadsafeQueue();
  38
  39     void push( const T& data );
  40     void pop( T& data );
  41
  42 private:
  43     std::queue< T > mQueue;
  44     mutable ::osl::Mutex mMutex;
  45     ::osl::Condition mCondition;
  46 };
  47
  48 template<class T>
  49 ThreadsafeQueue<T>::ThreadsafeQueue()
  50 {
  51 }
  52
  53 template<class T>
  54 void ThreadsafeQueue<T>::push( const T& data )
  55 {
  56     ::osl::MutexGuard guard( mMutex );
  57     mQueue.push( data );
  58     mMutex.release();
  59     mCondition.set();
  60 }
  61
  62 template<class T>
  63 void ThreadsafeQueue<T>::pop( T& data )
  64 {
  65     mCondition.wait();
  66     ::osl::MutexGuard guard( mMutex );
  67     while ( mQueue.empty() )
  68     {
  69         mMutex.release();
  70         mCondition.wait();
  71         mMutex.acquire();
  72     }
  73     data = mQueue.front();
  74     mQueue.pop();
  75 }
  76 }
  77 }
  78 }
  79
  80 #endif // _THREADSAFE_QUEUE_HXX
  81 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */