bc8d3f97eb
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
#ifndef TEST_ALLOCATOR_H
|
|
#define TEST_ALLOCATOR_H
|
|
|
|
#include <cstddef>
|
|
#include <type_traits>
|
|
#include <cstdlib>
|
|
#include <new>
|
|
#include <climits>
|
|
#include <cassert>
|
|
|
|
class test_alloc_base
|
|
{
|
|
protected:
|
|
static int time_to_throw;
|
|
public:
|
|
static int throw_after;
|
|
static int count;
|
|
static int alloc_count;
|
|
};
|
|
|
|
int test_alloc_base::count = 0;
|
|
int test_alloc_base::time_to_throw = 0;
|
|
int test_alloc_base::alloc_count = 0;
|
|
int test_alloc_base::throw_after = INT_MAX;
|
|
|
|
template <class T>
|
|
class test_allocator
|
|
: public test_alloc_base
|
|
{
|
|
int data_;
|
|
|
|
template <class U> friend class test_allocator;
|
|
public:
|
|
|
|
typedef unsigned size_type;
|
|
typedef int difference_type;
|
|
typedef T value_type;
|
|
typedef value_type* pointer;
|
|
typedef const value_type* const_pointer;
|
|
typedef typename std::add_lvalue_reference<value_type>::type reference;
|
|
typedef typename std::add_lvalue_reference<const value_type>::type const_reference;
|
|
|
|
template <class U> struct rebind {typedef test_allocator<U> other;};
|
|
|
|
test_allocator() throw() : data_(0) {++count;}
|
|
explicit test_allocator(int i) throw() : data_(i) {++count;}
|
|
test_allocator(const test_allocator& a) throw()
|
|
: data_(a.data_) {++count;}
|
|
template <class U> test_allocator(const test_allocator<U>& a) throw()
|
|
: data_(a.data_) {++count;}
|
|
~test_allocator() throw() {assert(data_ >= 0); --count; data_ = -1;}
|
|
pointer address(reference x) const {return &x;}
|
|
const_pointer address(const_reference x) const {return &x;}
|
|
pointer allocate(size_type n, const void* = 0)
|
|
{
|
|
assert(data_ >= 0);
|
|
if (time_to_throw >= throw_after)
|
|
throw std::bad_alloc();
|
|
++time_to_throw;
|
|
++alloc_count;
|
|
return (pointer)std::malloc(n * sizeof(T));
|
|
}
|
|
void deallocate(pointer p, size_type n)
|
|
{assert(data_ >= 0); --alloc_count; std::free(p);}
|
|
size_type max_size() const throw()
|
|
{return UINT_MAX / sizeof(T);}
|
|
void construct(pointer p, const T& val)
|
|
{::new(p) T(val);}
|
|
void destroy(pointer p) {p->~T();}
|
|
|
|
friend bool operator==(const test_allocator& x, const test_allocator& y)
|
|
{return x.data_ == y.data_;}
|
|
friend bool operator!=(const test_allocator& x, const test_allocator& y)
|
|
{return !(x == y);}
|
|
};
|
|
|
|
#endif
|