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split out code for managing page spans

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Daniel Micay 2018-09-02 02:03:27 -04:00
parent e93d039214
commit e4648192c0
4 changed files with 104 additions and 83 deletions
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16
pages.h Normal file
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#ifndef PAGES_H
#define PAGES_H
#include <stdbool.h>
#include <stddef.h>
#define PAGE_SHIFT 12
#define PAGE_SIZE ((size_t)1 << PAGE_SHIFT)
#define PAGE_MASK ((size_t)(PAGE_SIZE - 1))
#define PAGE_CEILING(s) (((s) + PAGE_MASK) & ~PAGE_MASK)
void *allocate_pages(size_t usable_size, size_t guard_size, bool unprotect);
void deallocate_pages(void *usable, size_t usable_size, size_t guard_size);
void *allocate_pages_aligned(size_t usable_size, size_t alignment, size_t guard_size);
#endif