289 lines
8.0 KiB
C++
289 lines
8.0 KiB
C++
/*************************************************************************
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*
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* $RCSfile: operators_new_delete.cxx,v $
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*
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* $Revision: 1.3 $
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*
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* last change: $Author: vg $ $Date: 2003-04-15 17:40:45 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library 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 GNU
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* Lesser General Public License for more 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#ifdef WNT /* avoid 'std::bad_alloc' unresolved externals */
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#define _CRTIMP
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#define _NTSDK
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#endif /* WNT */
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#ifndef INCLUDED_ALGORITHM
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#include <algorithm>
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#define INCLUDED_ALGORITHM
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#endif
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#ifndef INCLUDED_NEW
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#include <new>
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#define INCLUDED_NEW
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#endif
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#ifndef INCLUDED_STRING_H
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#include <string.h>
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#define INCLUDED_STRING_H
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#endif
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#ifndef _OSL_DIAGNOSE_H_
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#include <osl/diagnose.h>
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#endif
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#ifndef _RTL_ALLOC_H_
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#include <rtl/alloc.h>
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#endif
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using std::nothrow_t;
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// =======================================================================
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// AllocatorTraits
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// =======================================================================
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namespace
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{
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struct AllocatorTraits
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{
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typedef char const signature_type[8];
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const signature_type & m_signature;
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explicit AllocatorTraits (signature_type const & s) SAL_THROW(())
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: m_signature (s)
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{}
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std::size_t size (std::size_t n) const SAL_THROW(())
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{
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n = std::max(n, std::size_t(1));
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#if OSL_DEBUG_LEVEL > 0
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n += sizeof(signature_type);
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#endif /* OSL_DEBUG_LEVEL */
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return n;
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}
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void* init (void * p) const SAL_THROW(())
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{
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#if OSL_DEBUG_LEVEL > 0
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memcpy (p, m_signature, sizeof(signature_type));
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p = static_cast<char*>(p) + sizeof(signature_type);
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#endif /* OSL_DEBUG_LEVEL */
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return p;
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}
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void* fini (void * p) const SAL_THROW(())
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{
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#if OSL_DEBUG_LEVEL > 0
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p = static_cast<char*>(p) - sizeof(signature_type);
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if (memcmp (p, m_signature, sizeof(signature_type)) != 0)
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{
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OSL_ENSURE(0, "operator delete mismatch");
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}
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#endif /* OSL_DEBUG_LEVEL */
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return p;
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}
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};
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// =======================================================================
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struct VectorTraits : public AllocatorTraits
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{
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static const signature_type g_signature;
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VectorTraits() SAL_THROW(())
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: AllocatorTraits (g_signature)
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{}
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};
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struct ScalarTraits : public AllocatorTraits
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{
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static const signature_type g_signature;
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ScalarTraits() SAL_THROW(())
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: AllocatorTraits (g_signature)
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{}
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};
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const AllocatorTraits::signature_type VectorTraits::g_signature = "new[]()";
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const AllocatorTraits::signature_type ScalarTraits::g_signature = "new() ";
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} // anonymous namespace
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// =======================================================================
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// Allocator
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// =======================================================================
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static void default_handler (void)
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{
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// Multithreading race in 'std::set_new_handler()' call sequence below.
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throw std::bad_alloc();
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}
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// =======================================================================
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static void* allocate (
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std::size_t n, AllocatorTraits const & rTraits)
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SAL_THROW((std::bad_alloc))
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{
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n = rTraits.size (n);
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for (;;)
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{
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void * p = rtl_allocateMemory (sal_uInt32(n));
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if (p != 0)
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return rTraits.init (p);
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std::new_handler d = default_handler, f = std::set_new_handler (d);
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if (f != d)
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std::set_new_handler (f);
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if (f == 0)
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throw std::bad_alloc();
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(*f)();
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}
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}
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// =======================================================================
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static void* allocate (
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std::size_t n, AllocatorTraits const & rTraits, std::nothrow_t const &)
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SAL_THROW(())
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{
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try
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{
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return allocate (n, rTraits);
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}
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catch (std::bad_alloc const &)
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{
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return (0);
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}
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}
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// =======================================================================
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static void deallocate (void * p, AllocatorTraits const & rTraits)
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SAL_THROW(())
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{
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if (p)
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{
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rtl_freeMemory (rTraits.fini(p));
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}
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}
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// =======================================================================
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// T * p = new T; delete p;
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// =======================================================================
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void* SAL_CALL operator new (std::size_t n) throw (std::bad_alloc)
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{
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return allocate (n, ScalarTraits());
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}
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// =======================================================================
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void SAL_CALL operator delete (void * p) throw ()
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{
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deallocate (p, ScalarTraits());
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}
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// =======================================================================
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// T * p = new(nothrow) T; delete(nothrow) p;
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// =======================================================================
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void* SAL_CALL operator new (std::size_t n, std::nothrow_t const &) throw ()
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{
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return allocate (n, ScalarTraits(), nothrow_t());
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}
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// =======================================================================
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void SAL_CALL operator delete (void * p, std::nothrow_t const &) throw ()
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{
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deallocate (p, ScalarTraits());
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}
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// =======================================================================
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// T * p = new T[n]; delete[] p;
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// =======================================================================
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void* SAL_CALL operator new[] (std::size_t n) throw (std::bad_alloc)
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{
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return allocate (n, VectorTraits());
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}
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// =======================================================================
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void SAL_CALL operator delete[] (void * p) throw ()
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{
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deallocate (p, VectorTraits());
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}
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// =======================================================================
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// T * p = new(nothrow) T[n]; delete(nothrow)[] p;
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// =======================================================================
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void* SAL_CALL operator new[] (std::size_t n, std::nothrow_t const &) throw ()
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{
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return allocate (n, VectorTraits(), nothrow_t());
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}
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// =======================================================================
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void SAL_CALL operator delete[] (void * p, std::nothrow_t const &) throw ()
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{
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deallocate (p, VectorTraits());
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}
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// =======================================================================
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