include/o3tl/deleter.hxx

   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
  10 #ifndef INCLUDED_O3TL_DELETER_HXX
  11 #define INCLUDED_O3TL_DELETER_HXX
  12
  13 #include <sal/config.h>
  14
  15 #include <cstdlib>
  16
  17 #if defined(__COVERITY__)
  18 #define suppress_fun_call_w_exception(expr)                                                        \
  19     do                                                                                             \
  20     {                                                                                              \
  21         try                                                                                        \
  22         {                                                                                          \
  23             expr;                                                                                  \
  24         }                                                                                          \
  25         catch (...)                                                                                \
  26         {                                                                                          \
  27             std::terminate();                                                                      \
  28         }                                                                                          \
  29     } while (false)
  30 #else
  31 #define suppress_fun_call_w_exception(expr)                                                        \
  32     do                                                                                             \
  33     {                                                                                              \
  34         expr;                                                                                      \
  35     } while (false)
  36 #endif
  37
  38 namespace o3tl
  39 {
  40 /** To markup std::unique_ptr that coverity warns might throw exceptions
  41     which won't throw in practice, or where std::terminate is
  42     an acceptable response if they do
  43 */
  44 template <typename T> struct default_delete
  45 {
  46     void operator()(T* p) noexcept { suppress_fun_call_w_exception(delete p); }
  47 };
  48
  49 struct free_delete
  50 {
  51     void operator()(void* p) { std::free(p); }
  52 };
  53
  54 template <typename uniqueptr> void reset_preserve_ptr_during(uniqueptr& ptr)
  55 {
  56     // HACK: for the case where the dtor of the obj held by ptr will trigger
  57     // functions which expect ptr to still be set during the dtor.
  58     // e.g. SdrObject::GetBroadcaster() is called during the destructor
  59     // in SdrEdgeObj::Notify(). So delete first, then clear the pointer
  60     delete ptr.get();
  61     // coverity[leaked_storage] - not a leak, deleted on line above
  62     (void)ptr.release();
  63 }
  64 }
  65
  66 #endif
  67
  68 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */