BLT/include/blt/std/memory.h

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2.7 KiB
C++
Executable File

/*
* Created by Brett on 08/02/23.
* Licensed under GNU General Public License V3.0
* See LICENSE file for license detail
*/
#ifndef BLT_TESTS_MEMORY_H
#define BLT_TESTS_MEMORY_H
namespace blt {
/**
* Creates an encapsulation of a T array which will be automatically deleted when this object goes out of scope.
* This is a simple buffer meant to be used only inside of a function and not moved around, with a few minor exceptions.
* The internal buffer is allocated on the heap.
* The operator * has been overloaded to return the internal buffer. (or just use scoped_buffer.buffer if you wish to be explicit)
* The operator & was not used because I think it is stupid to do so.
* "*" on a reference is fine however since it isn't used to dereference in the case.
* @tparam T type that is stored in buffer eg char
*/
template<typename T>
struct scoped_buffer {
T* buffer;
unsigned long size;
explicit scoped_buffer(unsigned long size): size(size) {
buffer = new T[size];
}
scoped_buffer(scoped_buffer& copy) = delete;
scoped_buffer(scoped_buffer&& move) = delete;
scoped_buffer operator=(scoped_buffer& copyAssignment) = delete;
scoped_buffer operator=(scoped_buffer&& moveAssignment) = delete;
inline T& operator[](unsigned long index) const {
return buffer[index];
}
inline T* operator*(){
return buffer;
}
~scoped_buffer() {
delete[] buffer;
}
};
template<typename T>
struct nullptr_initializer {
private:
T* m_ptr = nullptr;
public:
nullptr_initializer() = default;
explicit nullptr_initializer(T* ptr): m_ptr(ptr) {}
nullptr_initializer(const nullptr_initializer<T>& ptr): m_ptr(ptr.m_ptr) {}
nullptr_initializer(nullptr_initializer<T>&& ptr) noexcept : m_ptr(ptr.m_ptr) {}
nullptr_initializer<T>& operator=(const nullptr_initializer<T>& ptr){
if (&ptr == this)
return *this;
this->m_ptr = ptr.m_ptr;
return *this;
}
nullptr_initializer<T>& operator=(nullptr_initializer<T>&& ptr) noexcept {
if (&ptr == this)
return *this;
this->m_ptr = ptr.m_ptr;
return *this;
}
inline T* operator->(){
return m_ptr;
}
~nullptr_initializer() = default;
};
}
#endif //BLT_TESTS_MEMORY_H