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#pragma once
// Kernel virtual memory region allocator
// This is entirely thread-safe
#include <sys.h>
#include <paging.h>
struct region_info;
typedef void (*kernel_pf_handler_t)(pagedir_t *pd, struct region_info *r, void* addr);
typedef struct region_info {
void* addr;
size_t size;
char* type;
kernel_pf_handler_t pf;
} region_info_t;
void region_allocator_init(void* kernel_data_end);
void* region_alloc(size_t size, char* type, kernel_pf_handler_t pf); // returns 0 on error
region_info_t *find_region(void* addr);
void region_free(void* addr);
// some usefull PF handlers
void pf_handler_unexpected(pagedir_t *pd, struct region_info *r, void* addr); // Expects never to be called
void pf_handler_stackoverflow(pagedir_t *pd, struct region_info *r, void* addr); // Stack overflow detected
// some functions for freeing regions and frames
// region_free_unmap_free : deletes a region and frees all frames that were mapped in it
void region_free_unmap_free(void* addr);
// region_free_unmap : deletes a region and unmaps all frames that were mapped in it, without freeing them
void region_free_unmap(void* addr);
void dbg_print_region_info();
/* vim: set ts=4 sw=4 tw=0 noet :*/
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