granicus.if.org Git - icinga2/blob - lib/base/scriptframe.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2016 Icinga Development Team (https://www.icinga.org/)  *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
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  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "base/scriptframe.hpp"
  21 #include "base/scriptglobal.hpp"
  22 #include "base/exception.hpp"
  23
  24 using namespace icinga;
  25
  26 boost::thread_specific_ptr<std::stack<ScriptFrame *> > ScriptFrame::m_ScriptFrames;
  27
  28 ScriptFrame::ScriptFrame(void)
  29         : Locals(new Dictionary()), Self(ScriptGlobal::GetGlobals()), Sandboxed(false)
  30 {
  31         PushFrame(this);
  32 }
  33
  34 ScriptFrame::ScriptFrame(const Value& self)
  35         : Locals(new Dictionary()), Self(self), Sandboxed(false)
  36 {
  37         PushFrame(this);
  38 }
  39
  40 ScriptFrame::~ScriptFrame(void)
  41 {
  42         ScriptFrame *frame = PopFrame();
  43         ASSERT(frame == this);
  44 }
  45
  46 ScriptFrame *ScriptFrame::GetCurrentFrame(void)
  47 {
  48         std::stack<ScriptFrame *> *frames = m_ScriptFrames.get();
  49
  50         ASSERT(!frames->empty());
  51         return frames->top();
  52 }
  53
  54 ScriptFrame *ScriptFrame::PopFrame(void)
  55 {
  56         std::stack<ScriptFrame *> *frames = m_ScriptFrames.get();
  57
  58         ASSERT(!frames->empty());
  59
  60         ScriptFrame *frame = frames->top();
  61         frames->pop();
  62
  63         return frame;
  64 }
  65
  66 void ScriptFrame::PushFrame(ScriptFrame *frame)
  67 {
  68         std::stack<ScriptFrame *> *frames = m_ScriptFrames.get();
  69
  70         if (!frames) {
  71                 frames = new std::stack<ScriptFrame *>();
  72                 m_ScriptFrames.reset(frames);
  73         }
  74
  75         if (frames->size() > 500)
  76                 BOOST_THROW_EXCEPTION(ScriptError("Recursion level too deep."));
  77
  78         frames->push(frame);
  79 }