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1 /* |
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2 * Copyright 2004-2006 Intel Corporation |
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3 * |
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4 * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 * you may not use this file except in compliance with the License. |
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6 * You may obtain a copy of the License at |
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7 * |
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8 * http://www.apache.org/licenses/LICENSE-2.0 |
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9 * |
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10 * Unless required by applicable law or agreed to in writing, software |
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11 * distributed under the License is distributed on an "AS IS" BASIS, |
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 * See the License for the specific language governing permissions and |
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14 * limitations under the License. |
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15 */ |
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16 |
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17 #include <queue> |
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18 #include <oasys/debug/DebugUtils.h> |
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19 #include <oasys/debug/Log.h> |
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20 #include <oasys/util/Singleton.h> |
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21 |
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22 #include "SimEvent.h" |
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23 #include "SimEventHandler.h" |
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24 |
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25 namespace dtnsim { |
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26 |
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27 /** |
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28 * The main simulator class. This defines the main event loop |
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29 */ |
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30 class Simulator : public oasys::Singleton<Simulator, false>, |
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31 public SimEventHandler, |
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32 public oasys::Logger |
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33 { |
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34 public: |
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35 /** |
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36 * Return the current simulator time. |
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37 */ |
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38 static double time() { return time_; } |
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39 |
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40 /** |
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41 * Constructor. |
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42 */ |
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43 Simulator(); |
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44 |
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45 /** |
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46 * Destructor. |
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47 */ |
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48 virtual ~Simulator() {} |
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49 |
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50 /** |
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51 * Add an event to the main event queue. |
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52 */ |
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53 static void post(SimEvent *e); |
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54 |
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55 /** |
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56 * Stops simulation and exits the loop |
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57 */ |
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58 void exit(); |
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59 |
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60 /** |
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61 * Main run loop. |
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62 */ |
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63 void run(); |
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64 |
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65 /** |
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66 * Handle all bundle events at nodes returning the amount of time |
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67 * (in ms) until the next timer is due. |
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68 */ |
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69 int run_node_events(); |
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70 |
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71 /** |
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72 * Pause execution of the simulator, running a console loop until |
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73 * it exits. |
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74 */ |
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75 void pause(); |
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76 |
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77 /** |
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78 * Run the command loop. |
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79 */ |
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80 void run_console(bool complete); |
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81 |
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82 /** |
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83 * Register a command to run at exit. |
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84 */ |
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85 void set_exit_event(SimAtEvent* event); |
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86 |
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87 static double runtill_; ///< time to end the simulation |
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88 |
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89 private: |
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90 /** |
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91 * Virtual from SimEventHandler |
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92 */ |
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93 void process(SimEvent* e); |
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94 |
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95 void log_inqueue_stats(); |
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96 |
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97 static double time_; ///< current time (static to avoid object) |
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98 |
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99 std::priority_queue<SimEvent*, |
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100 std::vector<SimEvent*>, |
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101 SimEventCompare> eventq_; |
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102 |
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103 SimAtEvent* exit_event_; |
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104 |
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105 void run_at_event(SimAtEvent* evt); |
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106 |
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107 /* |
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108 * Handlers for SIGINT to pause the simulation while it's running. |
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109 */ |
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110 static void handle_interrupt(int sig); |
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111 void check_interrupt(); |
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112 static bool interrupted_; |
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113 }; |
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114 |
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115 } // namespace dtnsim |
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116 |