realloc.h

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#ifndef NNGN_UTILS_ALLOC_REALLOC_H
#define NNGN_UTILS_ALLOC_REALLOC_H
 
#include <cstdlib>
 
#include "utils/concepts.h"
 
#include "base.h"
 
namespace nngn {
 
template<trivial T = char>
struct reallocator : stateless_allocator<reallocator<T>> {
    using value_type = T;
    using pointer = std::add_pointer_t<value_type>;
    pointer allocate(std::size_t n) noexcept;
    pointer reallocate(pointer p, std::size_t n) noexcept;
    void deallocate(pointer p, std::size_t) noexcept { free(p); }
};
 
template<trivial T>
auto reallocator<T>::allocate(std::size_t n) noexcept -> pointer {
    return static_cast<pointer>(malloc(n * sizeof(T)));
}
 
template<trivial T>
auto reallocator<T>::reallocate(pointer p, std::size_t n) noexcept -> pointer {
    return static_cast<pointer>(realloc(p, n * sizeof(T)));
}
 
}
 
#endif