Line data    Source code

       1             : 
       2             : /* Copyright (c) 2010-2013, Stefan Eilemann <eile@equalizergraphics.com>
       3             :  *
       4             :  * This library is free software; you can redistribute it and/or modify it under
       5             :  * the terms of the GNU Lesser General Public License version 2.1 as published
       6             :  * by the Free Software Foundation.
       7             :  *
       8             :  * This library is distributed in the hope that it will be useful, but WITHOUT
       9             :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
      10             :  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
      11             :  * details.
      12             :  *
      13             :  * You should have received a copy of the GNU Lesser General Public License
      14             :  * along with this library; if not, write to the Free Software Foundation, Inc.,
      15             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      16             :  */
      17             : 
      18             : namespace lunchbox
      19             : {
      20             : template< typename T > void LFQueue< T >::clear()
      21             : {
      22             :     LB_TS_SCOPED( _reader );
      23             :     _readPos = 0;
      24             :     _writePos = 0;
      25             : }
      26             : 
      27             : template< typename T > void LFQueue< T >::resize( const int32_t size )
      28             : {
      29             :     LBASSERT( isEmpty( ));
      30             :     _readPos = 0;
      31             :     _writePos = 0;
      32             :     _data.resize( size + 1 );
      33             : }
      34             : 
      35      254028 : template< typename T > bool LFQueue< T >::pop( T& result )
      36             : {
      37      254028 :     LB_TS_SCOPED( _reader );
      38      254028 :     if( _readPos == _writePos )
      39           0 :         return false;
      40             : 
      41      254028 :     result = _data[ _readPos ];
      42      254028 :     _readPos = (_readPos + 1) % _data.size();
      43      254028 :     return true;
      44             : }
      45             : 
      46      630925 : template< typename T > bool LFQueue< T >::getFront( T& result )
      47             : {
      48      630925 :     LB_TS_SCOPED( _reader );
      49      630925 :     if( _readPos == _writePos )
      50      376897 :         return false;
      51             : 
      52      254028 :     result = _data[ _readPos ];
      53      254028 :     return true;
      54             : }
      55             : 
      56      732176 : template< typename T > bool LFQueue< T >::push( const T& element )
      57             : {
      58      732176 :     LB_TS_SCOPED( _writer );
      59      732176 :     int32_t nextPos = (_writePos + 1) % _data.size();
      60      732176 :     if( nextPos == _readPos )
      61      477124 :         return false;
      62             : 
      63      255052 :     _data[ _writePos ] = element;
      64      255052 :     _writePos = nextPos;
      65      255052 :     return true;
      66             : }
      67             : }