# new

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    00001 // The -*- C++ -*- dynamic memory management header.
    00002
    00003 // Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
    00004 // 2003, 2004, 2005, 2006, 2007, 2009, 2010
    00005 // Free Software Foundation
    00006
    00007 // This file is part of GCC.
    00008 //
    00009 // GCC is free software; you can redistribute it and/or modify
    00010 // it under the terms of the GNU General Public License as published by
    00011 // the Free Software Foundation; either version 3, or (at your option)
    00012 // any later version.
    00013 //
    00014 // GCC is distributed in the hope that it will be useful,
    00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00017 // GNU General Public License for more details.
    00018 //
    00019 // Under Section 7 of GPL version 3, you are granted additional
    00020 // permissions described in the GCC Runtime Library Exception, version
    00021 // 3.1, as published by the Free Software Foundation.
    00022
    00023 // You should have received a copy of the GNU General Public License and
    00024 // a copy of the GCC Runtime Library Exception along with this program;
    00025 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    00026 // <http://www.gnu.org/licenses/>.
    00027
    00028 /** @file new
    00029  *  This is a Standard C++ Library header.
    00030  *
    00031  *  The header @c new defines several functions to manage dynamic memory and
    00032  *  handling memory allocation errors; see
    00033  *  http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
    00034  */
    00035
    00036 #ifndef _NEW
    00037 #define _NEW
    00038
    00039 #pragma GCC system_header
    00040
    00041 #include <cstddef>
    00042 #include <exception>
    00043
    00044 #pragma GCC visibility push(default)
    00045
    00046 extern "C++" {
    00047
    00048 namespace std
    00049 {
    00050   /**
    00051    *  @brief  Exception possibly thrown by @c new.
    00052    *  @ingroup exceptions
    00053    *
    00054    *  @c bad_alloc (or classes derived from it) is used to report allocation
    00055    *  errors from the throwing forms of @c new.  */
    00056   class bad_alloc : public exception
    00057   {
    00058   public:
    00059     bad_alloc() throw() { }
    00060
    00061     // This declaration is not useless:
    00062     // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
    00063     virtual ~bad_alloc() throw();
    00064
    00065     // See comment in eh_exception.cc.
    00066     virtual const char* what() const throw();
    00067   };
    00068
    00069   struct nothrow_t { };
    00070
    00071   extern const nothrow_t nothrow;
    00072
    00073   /** If you write your own error handler to be called by @c new, it must
    00074    *  be of this type.  */
    00075   typedef void (*new_handler)();
    00076
    00077   /// Takes a replacement handler as the argument, returns the
    00078   /// previous handler.
    00079   new_handler set_new_handler(new_handler) throw();
    00080 } // namespace std
    00081
    00082 //@{
    00083 /** These are replaceable signatures:
    00084  *  - normal single new and delete (no arguments, throw @c bad_alloc on error)
    00085  *  - normal array new and delete (same)
    00086  *  - @c nothrow single new and delete (take a @c nothrow argument, return
    00087  *    @c NULL on error)
    00088  *  - @c nothrow array new and delete (same)
    00089  *
    00090  *  Placement new and delete signatures (take a memory address argument,
    00091  *  does nothing) may not be replaced by a user's program.
    00092 */
    00093 void* operator new(std::size_t) throw (std::bad_alloc);
    00094 void* operator new[](std::size_t) throw (std::bad_alloc);
    00095 void operator delete(void*) throw();
    00096 void operator delete[](void*) throw();
    00097 void* operator new(std::size_t, const std::nothrow_t&) throw();
    00098 void* operator new[](std::size_t, const std::nothrow_t&) throw();
    00099 void operator delete(void*, const std::nothrow_t&) throw();
    00100 void operator delete[](void*, const std::nothrow_t&) throw();
    00101
    00102 // Default placement versions of operator new.
    00103 inline void* operator new(std::size_t, void* __p) throw() { return __p; }
    00104 inline void* operator new[](std::size_t, void* __p) throw() { return __p; }
    00105
    00106 // Default placement versions of operator delete.
    00107 inline void  operator delete  (void*, void*) throw() { }
    00108 inline void  operator delete[](void*, void*) throw() { }
    00109 //@}
    00110 } // extern "C++"
    00111
    00112 #pragma GCC visibility pop
    00113
    00114 #endif