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76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
// Copyright (C) 1994-2016 Free Software Foundation, Inc.
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//
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// This file is part of GCC.
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//
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// GCC is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// GCC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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#include "tinfo.h"
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namespace __cxxabiv1 {
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__pbase_type_info::
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~__pbase_type_info ()
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{}
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bool __pbase_type_info::
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__do_catch (const type_info *thr_type,
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void **thr_obj,
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unsigned outer) const
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{
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if (*this == *thr_type)
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return true; // same type
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#if __cpp_rtti
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if (typeid (*this) != typeid (*thr_type))
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return false; // not both same kind of pointers
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#endif
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if (!(outer & 1))
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// We're not the same and our outer pointers are not all const qualified
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// Therefore there must at least be a qualification conversion involved
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// But for that to be valid, our outer pointers must be const qualified.
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return false;
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const __pbase_type_info *thrown_type =
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static_cast <const __pbase_type_info *> (thr_type);
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unsigned tflags = thrown_type->__flags;
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bool throw_tx = (tflags & __transaction_safe_mask);
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bool catch_tx = (__flags & __transaction_safe_mask);
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if (throw_tx && !catch_tx)
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/* Catch can perform a transaction-safety conversion. */
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tflags &= ~__transaction_safe_mask;
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if (catch_tx && !throw_tx)
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/* But not the reverse. */
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return false;
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if (tflags & ~__flags)
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// We're less qualified.
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return false;
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if (!(__flags & __const_mask))
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outer &= ~1;
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return __pointer_catch (thrown_type, thr_obj, outer);
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}
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}
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