memorymanagement.h File Reference

Defines a MemoryManager class for handling memory allocation and deallocation. More...

#include <cstddef>
#include <cstdint>
#include <system/multiboot.h>
#include <memory/virtual.h>

Go to the source code of this file.

Classes
struct	MaxOS::memory::MemoryChunk
	A span of memory in the heap, can be allocated or free. Used as a node in a doubly linked list. More...
class	MaxOS::memory::MemoryManager
	Handles memory allocation and deallocation. More...

Functions
void *	operator new (size_t size) throw ()
	Overloaded new operator, allocates memory using the KERNEL memory manager.
void *	operator new[] (size_t size) throw ()
	Overloaded new operator, allocates memory using the KERNEL memory manager.
void *	operator new (size_t size, void *pointer)
	Overloaded new operator, allocates memory using the KERNEL memory manager.
void *	operator new[] (size_t size, void *pointer)
	Overloaded new operator, allocates memory using the KERNEL memory manager.
void	operator delete (void *pointer)
	Overloaded delete operator, frees memory using the KERNEL memory manager.
void	operator delete[] (void *pointer)
	Overloaded delete operator, frees memory using the KERNEL memory manager.
void	operator delete (void *pointer, size_t size)
	Overloaded delete operator, frees memory using the KERNEL memory manager.
void	operator delete[] (void *pointer, size_t size)
	Overloaded delete operator, frees memory using the KERNEL memory manager.

Variables
constexpr size_t	MaxOS::memory::CHUNK_ALIGNMENT = 0x10
	How many bytes the chunks should be a multiple of (round up to this)

Detailed Description

Defines a MemoryManager class for handling memory allocation and deallocation.

Date

20th October 2022

Author

Max Tyson

Definition in file memorymanagement.h.

Function Documentation

operator delete() [1/2]

void operator delete

(

void *

pointer

)

Overloaded delete operator, frees memory using the KERNEL memory manager.

Parameters

pointer

The pointer to the memory to free

Definition at line 379 of file memorymanagement.cpp.

                                    {
 
    // Handle the memory freeing
    return MaxOS::memory::MemoryManager::kfree(pointer);
}

References MaxOS::memory::MemoryManager::kfree().

operator delete() [2/2]

void operator delete	(	void *	pointer,
		size_t	size
	)

Overloaded delete operator, frees memory using the KERNEL memory manager.

Parameters

pointer	The pointer to the memory to free
size	The size of the memory to free - ignored in this implementation

Definition at line 402 of file memorymanagement.cpp.

                                            {
 
    // Handle the memory freeing
    return MaxOS::memory::MemoryManager::kfree(pointer);
}

References MaxOS::memory::MemoryManager::kfree().

operator delete[]() [1/2]

void operator delete[]

(

void *

pointer

)

Overloaded delete operator, frees memory using the KERNEL memory manager.

Parameters

pointer

The pointer to the memory to free

Definition at line 390 of file memorymanagement.cpp.

                                      {
 
    // Handle the memory freeing
    return MaxOS::memory::MemoryManager::kfree(pointer);
}

References MaxOS::memory::MemoryManager::kfree().

operator delete[]() [2/2]

void operator delete[]	(	void *	pointer,
		size_t	size
	)

Overloaded delete operator, frees memory using the KERNEL memory manager.

Parameters

pointer	The pointer to the memory to free
size	The size of the memory to free - ignored in this implementation

Definition at line 414 of file memorymanagement.cpp.

                                                   {
 
    // Handle the memory freeing
    return MaxOS::memory::MemoryManager::kfree(pointer);
}

References MaxOS::memory::MemoryManager::kfree().

operator new() [1/2]

void * operator new	(	size_t	size	)
throw	(
	)

Overloaded new operator, allocates memory using the KERNEL memory manager.

Parameters

size	The size of the memory to allocate

Returns

The pointer to the allocated memory

Definition at line 331 of file memorymanagement.cpp.

                                        {
 
    // Handle the memory allocation
    return MaxOS::memory::MemoryManager::kmalloc(size);
}

References MaxOS::memory::MemoryManager::kmalloc().

operator new() [2/2]

void * operator new	(	size_t	size,
		void *	pointer
	)

Overloaded new operator, allocates memory using the KERNEL memory manager.

Parameters

pointer	The pointer to the memory to allocate
size	The size of the memory to free - ignored in this implementation

Returns

The pointer to the memory

Definition at line 356 of file memorymanagement.cpp.

                                               {
 
    return pointer;
}

operator new[]() [1/2]

void * operator new[]	(	size_t	size	)
throw	(
	)

Overloaded new operator, allocates memory using the KERNEL memory manager.

Parameters

size	The size of the memory to allocate

Returns

The pointer to the allocated memory

Definition at line 343 of file memorymanagement.cpp.

                                          {
 
    // Handle the memory allocation
    return MaxOS::memory::MemoryManager::kmalloc(size);
}

References MaxOS::memory::MemoryManager::kmalloc().

operator new[]() [2/2]

void * operator new[]	(	size_t	size,
		void *	pointer
	)

Overloaded new operator, allocates memory using the KERNEL memory manager.

Parameters

size	The size of the memory to free - ignored in this implementation
pointer	The pointer to the memory to allocate

Returns

The pointer to the memory

Definition at line 368 of file memorymanagement.cpp.

                                                 {
 
 
    return pointer;
}

Variable Documentation

CHUNK_ALIGNMENT

constexpr size_t MaxOS::memory::CHUNK_ALIGNMENT = 0x10

constexpr

How many bytes the chunks should be a multiple of (round up to this)

Definition at line 34 of file memorymanagement.h.

Referenced by MaxOS::memory::MemoryManager::align().