94 lines
2.4 KiB
C++
94 lines
2.4 KiB
C++
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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// $XConsortium: Unwind_Stack.hh /main/5 1996/10/04 09:34:56 drk $
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class Destructable;
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#define UNWIND_STACK_SIZE 512
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class Unwind_Record
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{
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public:
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Destructable *f_object;
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unsigned short f_size;
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void set (Destructable *object, unsigned int size)
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{ f_object = object; f_size = size; }
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unsigned long object_start() const
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{ return ((unsigned long) f_object); }
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unsigned long object_end() const
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{ return ((unsigned long) f_object + f_size); }
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};
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class Unwind_Stack
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{
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public:
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Unwind_Stack()
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{ f_bottom = g_top;
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PRINTF (("+++ New TOS = %d\n", f_bottom)); }
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~Unwind_Stack()
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{ g_top = f_bottom;
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PRINTF (("--- Reset TOS = %d\n", g_top)); }
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void push (Destructable *object, unsigned int size);
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void pop()
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{ g_top--;
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PRINTF ((" Pop [ %d ]\n", g_top)); }
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int empty() const
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{ return (g_top == f_bottom); }
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const Unwind_Record &top() const
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{ return (g_stack[g_top-1]); }
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private:
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unsigned short f_bottom;
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static unsigned short g_top;
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#ifdef C_API
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static Unwind_Record* g_stack;
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friend void initialize_exception();
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friend void quit_exception();
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#else
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static Unwind_Record g_stack[UNWIND_STACK_SIZE];
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#endif
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};
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inline void
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Unwind_Stack::push (Destructable *object, unsigned int size)
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{
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void terminate();
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if (g_top > UNWIND_STACK_SIZE)
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{
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Exceptions::error (Exceptions::f_msg_out_of_obj_stack_memory,
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Exceptions::INTERNAL_ERROR);
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terminate();
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}
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PRINTF ((" Push [ %d ] = %p\n", g_top, object));
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g_stack[g_top++].set (object, size);
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}
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