libs/fifo.cpp

   1 /* Quarn OS
   2  *
   3  * Fifo
   4  *
   5  * Copyright (C) 2008-2009 Pawel Dziepak
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  */
  22
  23 #ifndef _FIFO_H_
  24 #error This file can not be compiled directly.
  25 #endif
  26
  27 template<typename T>
  28 void fifo<T>::push(const T obj) {
  29         queue.add(obj);
  30 }
  31
  32 template<typename T>
  33 T fifo<T>::pop() {
  34         while (queue.get_count() == 0) __asm__("sti\nhlt");
  35         T obj = queue[0];
  36         queue.remove(0);
  37         return obj;
  38 }
  39
  40 template<typename T>
  41 bool fifo<T>::empty() const {
  42         if (queue.get_count() == 0)
  43                 return true;
  44         return false;
  45 }