2 // Testing allocator for the C++ library testsuite.
4 // Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 2, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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
27 // the GNU General Public License. This exception does not however
28 // invalidate any other reasons why the executable file might be covered by
29 // the GNU General Public License.
31 // This file provides an test instrumentation allocator that can be
32 // used to verify allocation functionality of standard library
33 // containers. 2002.11.25 smw
35 #ifndef _GLIBCXX_TESTSUITE_ALLOCATOR_H
36 #define _GLIBCXX_TESTSUITE_ALLOCATOR_H
43 bool new_called = false;
44 bool delete_called = false;
45 std::size_t requested = 0;
50 class allocation_tracker
53 typedef std::size_t size_type;
56 allocate(size_type blocksize)
58 allocationTotal_ += blocksize;
59 return ::operator new(blocksize);
63 construct() { constructCount_++; }
66 destroy() { destructCount_++; }
69 deallocate(void* p, size_type blocksize)
72 deallocationTotal_ += blocksize;
76 allocationTotal() { return allocationTotal_; }
79 deallocationTotal() { return deallocationTotal_; }
82 constructCount() { return constructCount_; }
85 destructCount() { return destructCount_; }
91 deallocationTotal_ = 0;
97 static size_type allocationTotal_;
98 static size_type deallocationTotal_;
99 static int constructCount_;
100 static int destructCount_;
103 // A simple basic allocator that just forwards to the
104 // allocation_tracker to fulfill memory requests. This class is
105 // templated on the target object type, but tracker isn't.
110 typedef T value_type;
112 typedef const T* const_pointer;
113 typedef T& reference;
114 typedef const T& const_reference;
115 typedef std::size_t size_type;
116 typedef std::ptrdiff_t difference_type;
118 template<class U> struct rebind { typedef tracker_alloc<U> other; };
121 address(reference value) const
125 address(const_reference value) const
128 tracker_alloc() throw()
131 tracker_alloc(const tracker_alloc&) throw()
135 tracker_alloc(const tracker_alloc<U>&) throw()
138 ~tracker_alloc() throw()
142 max_size() const throw()
143 { return std::numeric_limits<std::size_t>::max() / sizeof(T); }
146 allocate(size_type n, const void* = 0)
148 return static_cast<pointer>(allocation_tracker::allocate(n * sizeof(T)));
152 construct(pointer p, const T& value)
155 allocation_tracker::construct();
162 allocation_tracker::destroy();
166 deallocate(pointer p, size_type num)
167 { allocation_tracker::deallocate(p, num * sizeof(T)); }
170 template<class T1, class T2>
172 operator==(const tracker_alloc<T1>&, const tracker_alloc<T2>&) throw()
175 template<class T1, class T2>
177 operator!=(const tracker_alloc<T1>&, const tracker_alloc<T2>&) throw()
181 check_construct_destroy(const char* tag, int expected_c, int expected_d);
183 template<typename Alloc, bool uses_global_new_and_delete>
185 check_new(Alloc a = Alloc())
187 bool test __attribute__((unused)) = true;
188 typename Alloc::pointer p = a.allocate(10);
189 if (uses_global_new_and_delete)
190 test &= ( requested >= (10 * 15 * sizeof(long)) );
192 test &= ( new_called == uses_global_new_and_delete );
194 test &= ( delete_called == uses_global_new_and_delete );
199 template<typename Alloc>
201 check_deallocate_null()
203 // Let's not core here...
205 a.deallocate(NULL, 1);
206 a.deallocate(NULL, 10);
209 template<typename Alloc>
211 check_allocate_max_size()
216 a.allocate(a.max_size() + 1);
218 catch(std::bad_alloc&)
229 }; // namespace __gnu_test
231 #endif // _GLIBCXX_TESTSUITE_ALLOCATOR_H