// Copyright (c) 2010, Google Inc.
|
// All rights reserved.
|
//
|
// Redistribution and use in source and binary forms, with or without
|
// modification, are permitted provided that the following conditions are
|
// met:
|
//
|
// * Redistributions of source code must retain the above copyright
|
// notice, this list of conditions and the following disclaimer.
|
// * Redistributions in binary form must reproduce the above
|
// copyright notice, this list of conditions and the following disclaimer
|
// in the documentation and/or other materials provided with the
|
// distribution.
|
// * Neither the name of Google Inc. nor the names of its
|
// contributors may be used to endorse or promote products derived from
|
// this software without specific prior written permission.
|
//
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
// ---
|
|
#ifndef UTIL_GTL_LIBC_ALLOCATOR_WITH_REALLOC_H_
|
#define UTIL_GTL_LIBC_ALLOCATOR_WITH_REALLOC_H_
|
|
#include "sparseconfig.h"
|
#include <stdlib.h> // for malloc/realloc/free
|
#include <stddef.h> // for ptrdiff_t
|
#include <new> // for placement new
|
|
_START_GOOGLE_NAMESPACE_
|
|
template<class T>
|
class libc_allocator_with_realloc {
|
public:
|
typedef T value_type;
|
typedef size_t size_type;
|
typedef ptrdiff_t difference_type;
|
|
typedef T* pointer;
|
typedef const T* const_pointer;
|
typedef T& reference;
|
typedef const T& const_reference;
|
|
libc_allocator_with_realloc() {}
|
libc_allocator_with_realloc(const libc_allocator_with_realloc&) {}
|
~libc_allocator_with_realloc() {}
|
|
pointer address(reference r) const { return &r; }
|
const_pointer address(const_reference r) const { return &r; }
|
|
pointer allocate(size_type n, const_pointer = 0) {
|
return static_cast<pointer>(malloc(n * sizeof(value_type)));
|
}
|
void deallocate(pointer p, size_type) {
|
free(p);
|
}
|
pointer reallocate(pointer p, size_type n) {
|
// p points to a storage array whose objects have already been destroyed
|
// cast to void* to prevent compiler warnings about calling realloc() on
|
// an object which cannot be relocated in memory
|
return static_cast<pointer>(realloc(static_cast<void*>(p), n * sizeof(value_type)));
|
}
|
|
size_type max_size() const {
|
return static_cast<size_type>(-1) / sizeof(value_type);
|
}
|
|
void construct(pointer p, const value_type& val) {
|
new(p) value_type(val);
|
}
|
void destroy(pointer p) { p->~value_type(); }
|
|
template <class U>
|
libc_allocator_with_realloc(const libc_allocator_with_realloc<U>&) {}
|
|
template<class U>
|
struct rebind {
|
typedef libc_allocator_with_realloc<U> other;
|
};
|
};
|
|
// libc_allocator_with_realloc<void> specialization.
|
template<>
|
class libc_allocator_with_realloc<void> {
|
public:
|
typedef void value_type;
|
typedef size_t size_type;
|
typedef ptrdiff_t difference_type;
|
typedef void* pointer;
|
typedef const void* const_pointer;
|
|
template<class U>
|
struct rebind {
|
typedef libc_allocator_with_realloc<U> other;
|
};
|
};
|
|
template<class T>
|
inline bool operator==(const libc_allocator_with_realloc<T>&,
|
const libc_allocator_with_realloc<T>&) {
|
return true;
|
}
|
|
template<class T>
|
inline bool operator!=(const libc_allocator_with_realloc<T>&,
|
const libc_allocator_with_realloc<T>&) {
|
return false;
|
}
|
|
_END_GOOGLE_NAMESPACE_
|
|
#endif // UTIL_GTL_LIBC_ALLOCATOR_WITH_REALLOC_H_
|
