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1 /* |
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2 * This file is part of the KDE libraries |
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3 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) |
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4 * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
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5 * Copyright (C) 2003 Apple Computer, Inc. |
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6 * |
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7 * This library is free software; you can redistribute it and/or |
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8 * modify it under the terms of the GNU Library General Public |
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9 * License as published by the Free Software Foundation; either |
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10 * version 2 of the License, or (at your option) any later version. |
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11 * |
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12 * This library is distributed in the hope that it will be useful, |
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Library General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Library General Public License |
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18 * along with this library; see the file COPYING.LIB. If not, write to |
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19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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20 * Boston, MA 02110-1301, USA. |
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21 * |
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22 */ |
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23 |
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24 #ifndef ExecState_H |
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25 #define ExecState_H |
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26 |
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27 #include "value.h" |
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28 #include "types.h" |
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29 #include "CommonIdentifiers.h" |
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30 |
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31 namespace KJS { |
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32 class Context; |
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33 class Interpreter; |
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34 |
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35 class Interpreter; |
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36 class FunctionImp; |
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37 class GlobalFuncImp; |
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38 |
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39 /** |
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40 * Represents the current state of script execution. This object allows you |
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41 * obtain a handle the interpreter that is currently executing the script, |
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42 * and also the current execution context. |
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43 */ |
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44 class ExecState { |
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45 friend class Interpreter; |
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46 friend class FunctionImp; |
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47 friend class GlobalFuncImp; |
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48 public: |
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49 /** |
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50 * Returns the interpreter associated with this execution state |
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51 * |
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52 * @return The interpreter executing the script |
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53 */ |
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54 Interpreter* dynamicInterpreter() const { return m_interpreter; } |
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55 |
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56 /** |
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57 * Returns the interpreter associated with the current scope's |
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58 * global object |
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59 * |
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60 * @return The interpreter currently in scope |
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61 */ |
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62 IMPORT Interpreter* lexicalInterpreter() const; |
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63 |
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64 /** |
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65 * Returns the execution context associated with this execution state |
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66 * |
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67 * @return The current execution state context |
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68 */ |
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69 Context* context() const { return m_context; } |
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70 |
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71 void setException(JSValue* e) { m_exception = e; } |
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72 void clearException() { m_exception = 0; } |
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73 JSValue* exception() const { return m_exception; } |
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74 JSValue** exceptionSlot() { return &m_exception; } |
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75 bool hadException() const { return !!m_exception; } |
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76 |
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77 // This is a workaround to avoid accessing the global variables for these identifiers in |
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78 // important property lookup functions, to avoid taking PIC branches in Mach-O binaries |
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79 const CommonIdentifiers& propertyNames() const { return *m_propertyNames; } |
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80 |
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81 private: |
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82 ExecState(Interpreter* interp, Context* con) |
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83 : m_interpreter(interp) |
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84 , m_context(con) |
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85 , m_exception(0) |
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86 , m_propertyNames(CommonIdentifiers::shared()) |
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87 { |
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88 } |
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89 Interpreter* m_interpreter; |
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90 Context* m_context; |
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91 JSValue* m_exception; |
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92 CommonIdentifiers* m_propertyNames; |
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93 }; |
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94 |
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95 } // namespace KJS |
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96 |
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97 #endif // ExecState_H |