LCOV - code coverage report
Current view: top level - sal/cpprt - operators_new_delete.cxx (source / functions) Hit Total Coverage
Test: commit c8344322a7af75b84dd3ca8f78b05543a976dfd5 Lines: 0 58 0.0 %
Date: 2015-06-13 12:38:46 Functions: 0 18 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include <algorithm>
      21             : #include <new>
      22             : #include <string.h>
      23             : #include <osl/diagnose.h>
      24             : #include <rtl/alloc.h>
      25             : 
      26             : // AllocatorTraits
      27             : 
      28             : namespace
      29             : {
      30             : 
      31             : struct AllocatorTraits
      32             : {
      33             :     typedef char const signature_type[8];
      34             :     const signature_type & m_signature;
      35             : 
      36           0 :     explicit AllocatorTraits (signature_type const & s)
      37           0 :         : m_signature (s)
      38           0 :     {}
      39             : 
      40           0 :     std::size_t size (std::size_t n) const
      41             :     {
      42           0 :         n = std::max(n, std::size_t(1));
      43             : #if OSL_DEBUG_LEVEL > 0
      44             :         n += sizeof(signature_type);
      45             : #endif  /* OSL_DEBUG_LEVEL  */
      46           0 :         return n;
      47             :     }
      48             : 
      49           0 :     void* init (void * p) const
      50             :     {
      51             : #if OSL_DEBUG_LEVEL > 0
      52             :         memcpy (p, m_signature, sizeof(signature_type));
      53             :         p = static_cast<char*>(p) + sizeof(signature_type);
      54             : #endif  /* OSL_DEBUG_LEVEL */
      55           0 :         return p;
      56             :     }
      57             : 
      58           0 :     void* fini (void * p) const
      59             :     {
      60             : #if OSL_DEBUG_LEVEL > 0
      61             :         p = static_cast<char*>(p) - sizeof(signature_type);
      62             :         if (memcmp (p, m_signature, sizeof(signature_type)) != 0)
      63             :         {
      64             :             OSL_FAIL("operator delete mismatch");
      65             :         }
      66             : #endif  /* OSL_DEBUG_LEVEL */
      67           0 :         return p;
      68             :     }
      69             : };
      70             : 
      71             : struct VectorTraits : public AllocatorTraits
      72             : {
      73             :     static const signature_type g_signature;
      74             : 
      75           0 :     VectorTraits()
      76           0 :         : AllocatorTraits (g_signature)
      77           0 :     {}
      78             : };
      79             : 
      80             : struct ScalarTraits : public AllocatorTraits
      81             : {
      82             :     static const signature_type g_signature;
      83             : 
      84           0 :     ScalarTraits()
      85           0 :         : AllocatorTraits (g_signature)
      86           0 :     {}
      87             : };
      88             : 
      89             : const AllocatorTraits::signature_type VectorTraits::g_signature = "new[]()";
      90             : const AllocatorTraits::signature_type ScalarTraits::g_signature = "new()  ";
      91             : 
      92             : } // anonymous namespace
      93             : 
      94             : // Allocator
      95             : 
      96           0 : static void default_handler()
      97             : {
      98             :     // Multithreading race in 'std::set_new_handler()' call sequence below.
      99           0 :     throw std::bad_alloc();
     100             : }
     101             : 
     102           0 : static void* allocate (
     103             :     std::size_t n, AllocatorTraits const & rTraits)
     104             : {
     105           0 :     n = rTraits.size (n);
     106             :     for (;;)
     107             :     {
     108           0 :         void * p = rtl_allocateMemory (sal_Size(n));
     109           0 :         if (p != 0)
     110           0 :             return rTraits.init (p);
     111             : 
     112           0 :         std::new_handler d = default_handler, f = std::set_new_handler (d);
     113           0 :         if (f != d)
     114           0 :             std::set_new_handler (f);
     115             : 
     116           0 :         if (f == 0)
     117           0 :             throw std::bad_alloc();
     118           0 :         (*f)();
     119           0 :     }
     120             : }
     121             : 
     122           0 : static void* allocate_nothrow (
     123             :     std::size_t n, AllocatorTraits const & rTraits)
     124             : {
     125             :     try
     126             :     {
     127           0 :         return allocate (n, rTraits);
     128             :     }
     129           0 :     catch (std::bad_alloc const &)
     130             :     {
     131           0 :         return 0;
     132             :     }
     133             : }
     134             : 
     135           0 : static void deallocate (void * p, AllocatorTraits const & rTraits)
     136             : {
     137           0 :     if (p)
     138             :     {
     139           0 :         rtl_freeMemory (rTraits.fini(p));
     140             :     }
     141           0 : }
     142             : 
     143             : // T * p = new T; delete p;
     144             : 
     145           0 : void* SAL_CALL operator new (std::size_t n) throw (std::bad_alloc)
     146             : {
     147           0 :     return allocate (n, ScalarTraits());
     148             : }
     149             : 
     150           0 : void SAL_CALL operator delete (void * p) throw ()
     151             : {
     152           0 :     deallocate (p, ScalarTraits());
     153           0 : }
     154             : 
     155             : // T * p = new(nothrow) T; delete(nothrow) p;
     156             : 
     157           0 : void* SAL_CALL operator new (std::size_t n, std::nothrow_t const &) throw ()
     158             : {
     159           0 :     return allocate_nothrow (n, ScalarTraits());
     160             : }
     161             : 
     162           0 : void SAL_CALL operator delete (void * p, std::nothrow_t const &) throw ()
     163             : {
     164           0 :     deallocate (p, ScalarTraits());
     165           0 : }
     166             : 
     167             : // T * p = new T[n]; delete[] p;
     168             : 
     169           0 : void* SAL_CALL operator new[] (std::size_t n) throw (std::bad_alloc)
     170             : {
     171           0 :     return allocate (n, VectorTraits());
     172             : }
     173             : 
     174           0 : void SAL_CALL operator delete[] (void * p) throw ()
     175             : {
     176           0 :     deallocate (p, VectorTraits());
     177           0 : }
     178             : 
     179             : // T * p = new(nothrow) T[n]; delete(nothrow)[] p;
     180             : 
     181           0 : void* SAL_CALL operator new[] (std::size_t n, std::nothrow_t const &) throw ()
     182             : {
     183           0 :     return allocate_nothrow (n, VectorTraits());
     184             : }
     185             : 
     186           0 : void SAL_CALL operator delete[] (void * p, std::nothrow_t const &) throw ()
     187             : {
     188           0 :     deallocate (p, VectorTraits());
     189           0 : }
     190             : 
     191             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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