2 * Copyright 2010-2011 PathScale, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
15 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * memory.cc - Contains stub definition of C++ new/delete operators.
30 * These definitions are intended to be used for testing and are weak symbols
31 * to allow them to be replaced by definitions from a STL implementation.
32 * These versions simply wrap malloc() and free(), they do not provide a
33 * C++-specific allocator.
38 #include "stdexcept.h"
41 #define __has_builtin(x) 0
44 #if !__has_builtin(__sync_swap)
45 #define __sync_swap __sync_lock_test_and_set
54 /// The type of the function called when allocation fails.
55 typedef void (*new_handler)();
57 * The function to call when allocation fails. By default, there is no
58 * handler and a bad allocation exception is thrown if an allocation fails.
60 static new_handler new_handl;
65 * Sets a function to be called when there is a failure in new.
68 new_handler set_new_handler(new_handler handler)
70 return __sync_swap(&new_handl, handler);
76 void* operator new(size_t size)
78 void * mem = malloc(size);
87 throw std::bad_alloc();
96 void* operator new(size_t size, const std::nothrow_t &) throw()
98 void *mem = malloc(size);
109 // nothrow operator new should return NULL in case of
110 // std::bad_alloc exception in new handler
125 __attribute__((weak))
126 void operator delete(void * ptr)
132 __attribute__((weak))
133 void * operator new[](size_t size)
135 return ::operator new(size);
139 __attribute__((weak))
140 void operator delete[](void * ptr) throw()
142 ::operator delete(ptr);