1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef TEST_ALLOCATOR_H
11 #define TEST_ALLOCATOR_H
14 #include <type_traits>
23 static int time_to_throw;
25 static int throw_after;
27 static int alloc_count;
30 int test_alloc_base::count = 0;
31 int test_alloc_base::time_to_throw = 0;
32 int test_alloc_base::alloc_count = 0;
33 int test_alloc_base::throw_after = INT_MAX;
37 : public test_alloc_base
41 template <class U> friend class test_allocator;
44 typedef unsigned size_type;
45 typedef int difference_type;
47 typedef value_type* pointer;
48 typedef const value_type* const_pointer;
49 typedef typename std::add_lvalue_reference<value_type>::type reference;
50 typedef typename std::add_lvalue_reference<const value_type>::type const_reference;
52 template <class U> struct rebind {typedef test_allocator<U> other;};
54 test_allocator() throw() : data_(0) {++count;}
55 explicit test_allocator(int i) throw() : data_(i) {++count;}
56 test_allocator(const test_allocator& a) throw()
57 : data_(a.data_) {++count;}
58 template <class U> test_allocator(const test_allocator<U>& a) throw()
59 : data_(a.data_) {++count;}
60 ~test_allocator() throw() {assert(data_ >= 0); --count; data_ = -1;}
61 pointer address(reference x) const {return &x;}
62 const_pointer address(const_reference x) const {return &x;}
63 pointer allocate(size_type n, const void* = 0)
66 if (time_to_throw >= throw_after) {
67 #ifndef _LIBCPP_NO_EXCEPTIONS
68 throw std::bad_alloc();
75 return (pointer)std::malloc(n * sizeof(T));
77 void deallocate(pointer p, size_type n)
78 {assert(data_ >= 0); --alloc_count; std::free(p);}
79 size_type max_size() const throw()
80 {return UINT_MAX / sizeof(T);}
81 void construct(pointer p, const T& val)
83 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
84 void construct(pointer p, T&& val)
85 {::new(p) T(std::move(val));}
86 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
87 void destroy(pointer p) {p->~T();}
89 friend bool operator==(const test_allocator& x, const test_allocator& y)
90 {return x.data_ == y.data_;}
91 friend bool operator!=(const test_allocator& x, const test_allocator& y)
96 class test_allocator<void>
97 : public test_alloc_base
101 template <class U> friend class test_allocator;
104 typedef unsigned size_type;
105 typedef int difference_type;
106 typedef void value_type;
107 typedef value_type* pointer;
108 typedef const value_type* const_pointer;
110 template <class U> struct rebind {typedef test_allocator<U> other;};
112 test_allocator() throw() : data_(-1) {}
113 explicit test_allocator(int i) throw() : data_(i) {}
114 test_allocator(const test_allocator& a) throw()
116 template <class U> test_allocator(const test_allocator<U>& a) throw()
118 ~test_allocator() throw() {data_ = 0;}
120 friend bool operator==(const test_allocator& x, const test_allocator& y)
121 {return x.data_ == y.data_;}
122 friend bool operator!=(const test_allocator& x, const test_allocator& y)
127 class other_allocator
131 template <class U> friend class other_allocator;
134 typedef T value_type;
136 other_allocator() : data_(-1) {}
137 explicit other_allocator(int i) : data_(i) {}
138 template <class U> other_allocator(const other_allocator<U>& a)
140 T* allocate(std::size_t n)
141 {return (T*)std::malloc(n * sizeof(T));}
142 void deallocate(T* p, std::size_t n)
145 other_allocator select_on_container_copy_construction() const
146 {return other_allocator(-2);}
148 friend bool operator==(const other_allocator& x, const other_allocator& y)
149 {return x.data_ == y.data_;}
150 friend bool operator!=(const other_allocator& x, const other_allocator& y)
153 typedef std::true_type propagate_on_container_copy_assignment;
154 typedef std::true_type propagate_on_container_move_assignment;
155 typedef std::true_type propagate_on_container_swap;
157 #ifdef _LIBCPP_HAS_NO_ADVANCED_SFINAE
158 std::size_t max_size() const
159 {return UINT_MAX / sizeof(T);}
160 #endif // _LIBCPP_HAS_NO_ADVANCED_SFINAE
164 #endif // TEST_ALLOCATOR_H