Scheduler/FIFORunner.hh

   1 // $Id$
   2 //
   3 // Copyright (C) 2008
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 2 of the License, or
  11 // (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the
  20 // Free Software Foundation, Inc.,
  21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23 /** \file
  24     \brief FIFORunner public header */
  25
  26 #ifndef HH_FIFORunner_
  27 #define HH_FIFORunner_ 1
  28
  29 // Custom includes
  30 #include <signal.h>
  31 #include <boost/utility.hpp>
  32 #include "../boost/intrusive/ilist.hpp"
  33 #include "../boost/intrusive/ilist_hook.hpp"
  34 #include "../Utils/singleton.hh"
  35 #include "EventManager.hh"
  36
  37 //#include "FIFORunner.mpp"
  38 ///////////////////////////////hh.p////////////////////////////////////////
  39
  40 namespace senf {
  41 namespace scheduler {
  42
  43     void restart();
  44
  45 namespace detail {
  46
  47     class FIFORunner
  48         : public singleton<FIFORunner>
  49     {
  50     public:
  51         struct TaskInfo;
  52
  53     private:
  54         struct TaskListTag;
  55         typedef boost::intrusive::ilist_base_hook<TaskListTag> TaskListBase;
  56         typedef boost::intrusive::ilist<TaskListBase::value_traits<TaskInfo>, false> TaskList;
  57
  58     public:
  59         class TaskInfo
  60             : public Event,
  61               public TaskListBase
  62         {
  63         public:
  64             explicit TaskInfo(std::string const & name);
  65             virtual ~TaskInfo();
  66
  67             void run();
  68
  69             bool runnable() const;
  70
  71         protected:
  72             void setRunnable();
  73
  74         private:
  75             virtual void v_run() = 0;
  76             virtual bool v_enabled() const;
  77
  78             bool runnable_;
  79 #       ifdef SENF_DEBUG
  80             std::string backtrace_;
  81 #       endif
  82
  83             friend class FIFORunner;
  84         };
  85
  86         typedef boost::filter_iterator<
  87             EventManager::IteratorFilter, TaskList::const_iterator> iterator;
  88
  89         using singleton<FIFORunner>::instance;
  90         using singleton<FIFORunner>::alive;
  91
  92         void enqueue(TaskInfo * task);
  93         void dequeue(TaskInfo * task);
  94
  95         void run();
  96
  97         void taskTimeout(unsigned ms);
  98         unsigned taskTimeout() const;
  99
 100         unsigned hangCount() const;
 101
 102         iterator begin() const;
 103         iterator end() const;
 104
 105     protected:
 106
 107     private:
 108         FIFORunner();
 109         ~FIFORunner();
 110
 111         static void watchdog(int, siginfo_t *, void *);
 112
 113         TaskList tasks_;
 114         TaskList::iterator next_;
 115         timer_t watchdogId_;
 116         unsigned watchdogMs_;
 117         std::string runningName_;
 118 #   ifdef SENF_DEBUG
 119         std::string runningBacktrace_;
 120 #   endif
 121         unsigned watchdogCount_;
 122         unsigned hangCount_;
 123
 124         friend void senf::scheduler::restart();
 125         friend class singleton<FIFORunner>;
 126     };
 127
 128 }}}
 129
 130 ///////////////////////////////hh.e////////////////////////////////////////
 131 #include "FIFORunner.cci"
 132 //#include "FIFORunner.ct"
 133 //#include "FIFORunner.cti"
 134 #endif
 135
 136 \f
 137 // Local Variables:
 138 // mode: c++
 139 // fill-column: 100
 140 // comment-column: 40
 141 // c-file-style: "senf"
 142 // indent-tabs-mode: nil
 143 // ispell-local-dictionary: "american"
 144 // compile-command: "scons -u test"
 145 // End: