unew.h

   1 // This file is part of the ustl library, an STL implementation.
   2 //
   3 // Copyright (C) 2005 by Mike Sharov <msharov@users.sourceforge.net>
   4 // This file is free software, distributed under the MIT License.
   5 //
   6 /// \file unew.h
   7 ///
   8 /// \brief Same as \<new\>, but throws ustl:: exceptions.
   9 //
  10
  11 #ifndef UNEW_H_11D237512B324C9C05A55DAF1BF086F1
  12 #define UNEW_H_11D237512B324C9C05A55DAF1BF086F1
  13
  14 #include "uexception.h"
  15
  16 /// Just like malloc, but throws on failure.
  17 void* throwing_malloc (size_t n) throw (ustl::bad_alloc);
  18 /// Just like free, but doesn't crash when given a NULL.
  19 void free_nullok (void* p) throw();
  20
  21 #ifdef WITHOUT_LIBSTDCPP
  22
  23 //
  24 // These are replaceable signatures:
  25 //  - normal single new and delete (no arguments, throw @c bad_alloc on error)
  26 //  - normal array new and delete (same)
  27 //  - @c nothrow single new and delete (take a @c nothrow argument, return
  28 //    @c NULL on error)
  29 //  - @c nothrow array new and delete (same)
  30 //
  31 //  Placement new and delete signatures (take a memory address argument,
  32 //  does nothing) may not be replaced by a user's program.
  33 //
  34 inline void* operator new (size_t n) throw (ustl::bad_alloc)    { return (throwing_malloc (n)); }
  35 inline void* operator new[] (size_t n) throw (ustl::bad_alloc)  { return (throwing_malloc (n)); }
  36 inline void  operator delete (void* p) throw()                  { free_nullok (p); }
  37 inline void  operator delete[] (void* p) throw()                { free_nullok (p); }
  38
  39 // Default placement versions of operator new.
  40 inline void* operator new (size_t, void* p) throw() { return (p); }
  41 inline void* operator new[] (size_t, void* p) throw() { return (p); }
  42
  43 // Default placement versions of operator delete.
  44 inline void  operator delete  (void*, void*) throw() { }
  45 inline void  operator delete[](void*, void*) throw() { }
  46
  47 #else
  48 #include <new>
  49 #endif  // WITHOUT_LIBSTDCPP
  50
  51 #endif
  52