00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2005 Free Software Foundation, Inc. 00004 * 00005 * This file is part of GNU Radio 00006 * 00007 * GNU Radio is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 2, or (at your option) 00010 * any later version. 00011 * 00012 * GNU Radio is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with GNU Radio; see the file COPYING. If not, write to 00019 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 00020 * Boston, MA 02111-1307, USA. 00021 */ 00022 #ifndef INCLUDED_GR_MSG_QUEUE_H 00023 #define INCLUDED_GR_MSG_QUEUE_H 00024 00025 #include <gr_msg_handler.h> 00026 #include <omnithread.h> 00027 00028 class gr_msg_queue; 00029 typedef boost::shared_ptr<gr_msg_queue> gr_msg_queue_sptr; 00030 00031 gr_msg_queue_sptr gr_make_msg_queue (); 00032 00036 class gr_msg_queue : public gr_msg_handler { 00037 omni_mutex d_mutex; 00038 omni_condition d_cond; 00039 gr_message_sptr d_head; 00040 gr_message_sptr d_tail; 00041 int d_count; 00042 00043 public: 00044 gr_msg_queue (); 00045 ~gr_msg_queue (); 00046 00048 void handle (gr_message_sptr msg) { insert_tail (msg); } 00049 00054 void insert_tail (gr_message_sptr msg); 00055 00060 gr_message_sptr delete_head (); 00061 00066 gr_message_sptr delete_head_nowait (); 00067 00069 bool empty_p () const { return d_count == 0; } 00070 00072 int count () const { return d_count; } 00073 00075 void flush (); 00076 }; 00077 00078 #endif /* INCLUDED_GR_MSG_QUEUE_H */