hamr_new_allocator.h

#ifndef hamr_new_allocator_h
#define hamr_new_allocator_h

#include "hamr_config.h"
#include <type_traits>
#include <memory>

namespace hamr
{

/// a deleter for arrays allocated with new
template <typename T>
class HAMR_EXPORT new_deleter
{
public:
    /** constructs the deleter
     * @param[in] ptr the pointer to the array to delete
     * @param[in] n the number of elements in the array
     */
    new_deleter(T *ptr, size_t n);

    /** deletes the array
     * @param[in] ptr the pointer to the array to delete. must be the same as
     *                that passed during construction.
     */
    void operator()(T *ptr);

private:
    T *m_ptr;
    size_t m_elem;
};






/// a class for allocating arrays with new
template <typename T>
struct HAMR_EXPORT new_allocator
{
    /** allocate an array of n elements.
     * @param[in] n the number of elements to allocate
     * @returns a shared pointer to the array that holds a deleter for the memory
     */
    static std::shared_ptr<T> allocate(size_t n) HAMR_EXPORT;

    /** allocate an array of n elements.
     * @param[in] n the number of elements to allocate
     * @param[in] val a value to initialize the elements to
     * @returns a shared pointer to the array that holds a deleter for the memory
     */
    static std::shared_ptr<T> allocate(size_t n, const T &val) HAMR_EXPORT;

    /** allocate an array of n elements.
     * @param[in] n the number of elements to allocate
     * @param[in] vals an array of n values to initialize the elements with
     * @returns a shared pointer to the array that holds a deleter for the memory
     */
    template <typename U>
    static std::shared_ptr<T> allocate(size_t n, const U *vals) HAMR_EXPORT;
};

}

#if !defined(HAMR_SEPARATE_IMPL)
#include "hamr_new_allocator_impl.h"
#endif

#endif