GNU Radio 3.5.3.2 C++ API
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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 3, 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., 51 Franklin Street, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 #ifndef INCLUDED_GR_TIMER_H 00023 #define INCLUDED_GR_TIMER_H 00024 00025 #include <gr_core_api.h> 00026 #include <gr_types.h> 00027 00028 class gr_timer; 00029 00030 typedef boost::shared_ptr<gr_timer> gr_timer_sptr; 00031 00032 GR_CORE_API typedef void (*gr_timer_hook)(gr_timer *, void *); 00033 00034 /*! 00035 * \brief create a timeout. 00036 * 00037 * \ingroup misc 00038 * gr_timer_hook is called when timer fires. 00039 */ 00040 GR_CORE_API gr_timer_sptr gr_make_timer (gr_timer_hook, void *); 00041 00042 /*! 00043 * \brief implement timeouts 00044 */ 00045 class GR_CORE_API gr_timer { 00046 double d_expiry; 00047 double d_period; 00048 gr_timer_hook d_hook; 00049 void *d_hook_arg; 00050 00051 friend GR_CORE_API gr_timer_sptr gr_make_timer (gr_timer_hook, void *); 00052 00053 gr_timer (...); 00054 00055 public: 00056 ~gr_timer (); 00057 00058 //! return absolute current time (seconds since the epoc). 00059 static double now (); 00060 00061 /*! 00062 * \brief schedule timer to fire at abs_when 00063 * \param abs_when absolute time in seconds since the epoc. 00064 */ 00065 void schedule_at (double abs_when); 00066 00067 /*! 00068 * \brief schedule timer to fire rel_when seconds from now. 00069 * \param rel_when relative time in seconds from now. 00070 */ 00071 void schedule_after (double rel_when); // relative time in seconds 00072 00073 /*! 00074 * \brief schedule a periodic timeout. 00075 * \param abs_when absolute time to fire first time 00076 * \param period time between firings 00077 */ 00078 void schedule_periodic (double abs_when, double period); 00079 00080 //! cancel timer 00081 void unschedule (); 00082 }; 00083 00084 #endif /* INCLUDED_GR_TIMER_H */