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1 // Thread.cpp
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2
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3 #include "lib.h"
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4 #include "Thread.h"
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5 #include "Error.h"
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6 #include "Action.h"
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7
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8 using namespace std;
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9
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10 Thread::Thread()
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11 : status(Error::finished)
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12 {
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13 }
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14
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15 Thread::~Thread()
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16 {
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17 }
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18
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19 void Thread::reset(Board & start, map<string, Board> * newGlobals)
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20 {
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21 dataStack.clear();
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22 programStack.clear();
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23 programStack.push_back(ActivationRecord(start));
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24 globals = newGlobals;
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25 multi.reset();
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26 if (globals != NULL)
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27 {
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28 status = Error::runnable;
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29 }
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30 else
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31 {
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32 status = Error::finished;
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33 }
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34 custom.clear();
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35 }
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36
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37 void Thread::go(void)
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38 {
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39 bool done = false;
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40
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41 if (status != Error::runnable)
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42 {
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43 done = true;
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44 }
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45 while (!done)
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46 {
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47 step();
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48 if (status != Error::runnable)
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49 {
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50 done = true;
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51 }
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52 }
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53 status = Error::finished;
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54 }
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55
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56 void Thread::step(void)
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57 {
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58 if (status == Error::runnable)
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59 {
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60 try
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61 {
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62 programStack.front().move(multi);
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63 Action & act = programStack.front().getAction(multi, dataStack);
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64 act.run(dataStack, programStack, *globals);
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65 }
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66 catch(CrashException & error)
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67 {
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68 status = error.get();
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69 if (status == Error::custom)
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70 {
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71 custom = error.getCustom();
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72 }
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73 else
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74 {
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75 custom.clear();
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76 }
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77 cerr << "Crash: " << Error::errorToString(status);
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78 if (status == Error::custom)
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79 {
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80 cerr << " " << custom << endl;
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81 }
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82 }
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83 }
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84
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85 if (programStack.empty())
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86 {
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87 status = Error::finished;
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88 custom.clear();
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89 }
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90 }
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91
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92 list<Binding> const & Thread::getDataStack(void)
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93 {
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94 return dataStack;
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95 }
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96
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97 list<ActivationRecord> const & Thread::getProgramStack(void)
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98 {
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99 return programStack;
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100 }
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101
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102 Error::t Thread::getStatus(void)
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103 {
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104 return status;
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105 }
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106
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107 string Thread::getErrorString(void)
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108 {
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109 if (status == Error::custom)
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110 {
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111 return Error::errorToString(status) + ": " + custom;
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112 }
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113 else
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114 {
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115 return Error::errorToString(status);
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116 }
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117 }
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