memorymanagement.h

Go to the documentation of this file.

 
#ifndef MAXOS_SYSTEM_MEMORYMANAGEMENT_H
#define MAXOS_SYSTEM_MEMORYMANAGEMENT_H
 
#include <cstddef>
#include <cstdint>
#include <system/multiboot.h>
#include <memory/virtual.h>
 
 
namespace MaxOS::memory {
 
    struct MemoryChunk {
 
        MemoryChunk* next;      
        MemoryChunk* prev;      
 
        bool allocated;         
        size_t size;            
 
    };
 
    constexpr size_t CHUNK_ALIGNMENT = 0x10;    
 
    class MemoryManager {
 
        private:
            MemoryChunk* m_first_memory_chunk;
            MemoryChunk* m_last_memory_chunk;
 
            VirtualMemoryManager* m_virtual_memory_manager;
 
            MemoryChunk* expand_heap(size_t size);
 
        public:
            inline static MemoryManager* s_current_memory_manager = nullptr;            
            inline static MemoryManager* s_kernel_memory_manager = nullptr;             
 
            explicit MemoryManager(VirtualMemoryManager* virtual_memory_manager = nullptr);
            ~MemoryManager();
 
            // Public Memory Management
            static void* malloc(size_t size);
            static void free(void* pointer);
 
            // Kernel Memory Management
            static void* kmalloc(size_t size);
            static void kfree(void* pointer);
 
            // Internal Memory Management
            void* handle_malloc(size_t size);
            void handle_free(void* pointer);
            VirtualMemoryManager* vmm();
 
            // Utility Functions
            size_t memory_used();
            static size_t align(size_t size);
            static void switch_active_memory_manager(MemoryManager* manager);
    };
}
 
 
void* operator new(size_t size) throw();
void* operator new[](size_t size) throw();
 
//Placement New
void* operator new(size_t size, void* pointer);
void* operator new[](size_t size, void* pointer);
 
void operator delete(void* pointer);
void operator delete[](void* pointer);
 
void operator delete(void* pointer, size_t size);
void operator delete[](void* pointer, size_t size);
 
#endif //MAXOS_SYSTEM_MEMORYMANAGEMENT_H