# 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
    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 2, 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 // You should have received a copy of the GNU General Public License
    00020 // along with GCC; see the file COPYING.  If not, write to
    00021 // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
    00022 // Boston, MA 02110-1301, USA.
    00023
    00024 // As a special exception, you may use this file as part of a free software
    00025 // library without restriction.  Specifically, if other files instantiate
    00026 // templates or use macros or inline functions from this file, or you compile
    00027 // this file and link it with other files to produce an executable, this
    00028 // file does not by itself cause the resulting executable to be covered by
    00029 // the GNU General Public License.  This exception does not however
    00030 // invalidate any other reasons why the executable file might be covered by
    00031 // the GNU General Public License.
    00032
    00033 /** @file new
    00034  *  This is a Standard C++ Library header.
    00035  *
    00036  *  The header @c new defines several functions to manage dynamic memory and
    00037  *  handling memory allocation errors; see
    00038  *  http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
    00039  */
    00040
    00041 #ifndef _NEW
    00042 #define _NEW
    00043
    00044 #include <cstddef>
    00045 #include <exception>
    00046
    00047 #pragma GCC visibility push(default)
    00048
    00049 extern "C++" {
    00050
    00051 namespace std
    00052 {
    00053   /**
    00054    *  @brief  Exception possibly thrown by @c new.
    00055    *
    00056    *  @c bad_alloc (or classes derived from it) is used to report allocation
    00057    *  errors from the throwing forms of @c new.  */
    00058   class bad_alloc : public exception
    00059   {
    00060   public:
    00061     bad_alloc() throw() { }
    00062
    00063     // This declaration is not useless:
    00064     // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
    00065     virtual ~bad_alloc() throw();
    00066
    00067     // See comment in eh_exception.cc.
    00068     virtual const char* what() const throw();
    00069   };
    00070
    00071   struct nothrow_t { };
    00072
    00073   extern const nothrow_t nothrow;
    00074
    00075   /** If you write your own error handler to be called by @c new, it must
    00076    *  be of this type.  */
    00077   typedef void (*new_handler)();
    00078
    00079   /// Takes a replacement handler as the argument, returns the
    00080   /// previous handler.
    00081   new_handler set_new_handler(new_handler) throw();
    00082 } // namespace std
    00083
    00084 //@{
    00085 /** These are replaceable signatures:
    00086  *  - normal single new and delete (no arguments, throw @c bad_alloc on error)
    00087  *  - normal array new and delete (same)
    00088  *  - @c nothrow single new and delete (take a @c nothrow argument, return
    00089  *    @c NULL on error)
    00090  *  - @c nothrow array new and delete (same)
    00091  *
    00092  *  Placement new and delete signatures (take a memory address argument,
    00093  *  does nothing) may not be replaced by a user's program.
    00094 */
    00095 void* operator new(std::size_t) throw (std::bad_alloc);
    00096 void* operator new[](std::size_t) throw (std::bad_alloc);
    00097 void operator delete(void*) throw();
    00098 void operator delete[](void*) throw();
    00099 void* operator new(std::size_t, const std::nothrow_t&) throw();
    00100 void* operator new[](std::size_t, const std::nothrow_t&) throw();
    00101 void operator delete(void*, const std::nothrow_t&) throw();
    00102 void operator delete[](void*, const std::nothrow_t&) throw();
    00103
    00104 // Default placement versions of operator new.
    00105 inline void* operator new(std::size_t, void* __p) throw() { return __p; }
    00106 inline void* operator new[](std::size_t, void* __p) throw() { return __p; }
    00107
    00108 // Default placement versions of operator delete.
    00109 inline void  operator delete  (void*, void*) throw() { }
    00110 inline void  operator delete[](void*, void*) throw() { }
    00111 //@}
    00112 } // extern "C++"
    00113
    00114 #pragma GCC visibility pop
    00115
    00116 #endif