1 // The -*- C++ -*- dynamic memory management header.
3 // Copyright (C) 1994, 1996, 1997, 1998, 2000, 2001, 2002
4 // Free Software Foundation
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23 // As a special exception, you may use this file as part of a free software
24 // library without restriction. Specifically, if other files instantiate
25 // templates or use macros or inline functions from this file, or you compile
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33 * The header @c new defines several functions to manage dynamic memory and
34 * handling memory allocation errors; see
35 * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
48 /** @c bad_alloc (or classes derived from it) is used to report allocation
49 * errors from the throwing forms of @c new. */
50 class bad_alloc : public exception
53 bad_alloc() throw() { }
54 // This declaration is not useless:
55 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
56 virtual ~bad_alloc() throw();
60 extern const nothrow_t nothrow;
61 /** If you write your own error handler to be called by @c new, it must
63 typedef void (*new_handler)();
64 /// Takes a replacement handler as the argument, returns the previous handler.
65 new_handler set_new_handler(new_handler);
69 /** These are replaceable signatures:
70 * - normal single new and delete (no arguments, throw @c bad_alloc on error)
71 * - normal array new and delete (same)
72 * - @c nothrow single new and delete (take a @c nothrow argument, return
74 * - @c nothrow array new and delete (same)
76 * Placement new and delete signatures (take a memory address argument,
77 * does nothing) may not be replaced by a user's program.
79 void* operator new(std::size_t) throw (std::bad_alloc);
80 void* operator new[](std::size_t) throw (std::bad_alloc);
81 void operator delete(void*) throw();
82 void operator delete[](void*) throw();
83 void* operator new(std::size_t, const std::nothrow_t&) throw();
84 void* operator new[](std::size_t, const std::nothrow_t&) throw();
85 void operator delete(void*, const std::nothrow_t&) throw();
86 void operator delete[](void*, const std::nothrow_t&) throw();
88 // Default placement versions of operator new.
89 inline void* operator new(std::size_t, void* __p) throw() { return __p; }
90 inline void* operator new[](std::size_t, void* __p) throw() { return __p; }