1 // The -*- C++ -*- dynamic memory management header.
3 // Copyright (C) 1994, 1996, 1997, 1998, 2000, 2001 Free Software Foundation
5 // This file is part of GNU CC.
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22 // As a special exception, you may use this file as part of a free software
23 // library without restriction. Specifically, if other files instantiate
24 // templates or use macros or inline functions from this file, or you compile
25 // this file and link it with other files to produce an executable, this
26 // file does not by itself cause the resulting executable to be covered by
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32 * This header defines several functions to manage dynamic memory and
33 * handling memory allocation errors; see
34 * http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
47 /** @c bad_alloc (or classes derived from it) is used to report allocation
48 * errors from the throwing forms of @c new. */
49 class bad_alloc : public exception
52 bad_alloc() throw() { }
53 virtual ~bad_alloc() throw();
57 extern const nothrow_t nothrow;
58 /** If you write your own error handler to be called by @c new, it must
60 typedef void (*new_handler)();
61 /// Takes a replacement handler as the argument, returns the previous handler.
62 new_handler set_new_handler(new_handler);
66 /** These are replaceable signatures:
67 * - normal single new and delete (no arguments, throw @c bad_alloc on error)
68 * - normal array new and delete (same)
69 * - @c nothrow single new and delete (take a @c nothrow argument, return
71 * - @c nothrow array new and delete (same)
73 * Placement new and delete signatures (take a memory address argument,
74 * does nothing) may not be replaced by a user's program.
76 void *operator new(std::size_t) throw (std::bad_alloc);
77 void *operator new[](std::size_t) throw (std::bad_alloc);
78 void operator delete(void *) throw();
79 void operator delete[](void *) throw();
80 void *operator new(std::size_t, const std::nothrow_t&) throw();
81 void *operator new[](std::size_t, const std::nothrow_t&) throw();
82 void operator delete(void *, const std::nothrow_t&) throw();
83 void operator delete[](void *, const std::nothrow_t&) throw();
85 // Default placement versions of operator new.
86 inline void *operator new(std::size_t, void *place) throw() { return place; }
87 inline void *operator new[](std::size_t, void *place) throw() { return place; }