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32 lines
828 B
C
32 lines
828 B
C
#ifndef PAGES_H
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#define PAGES_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "util.h"
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#define PAGE_SHIFT 12
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#ifndef PAGE_SIZE
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#define PAGE_SIZE ((size_t)1 << PAGE_SHIFT)
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#endif
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void *allocate_pages(size_t usable_size, size_t guard_size, bool unprotect, const char *name);
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void *allocate_pages_aligned(size_t usable_size, size_t alignment, size_t guard_size, const char *name);
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void deallocate_pages(void *usable, size_t usable_size, size_t guard_size);
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static inline size_t page_align(size_t size) {
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return align(size, PAGE_SIZE);
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}
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static inline size_t hash_page(const void *p) {
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uintptr_t u = (uintptr_t)p >> PAGE_SHIFT;
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size_t sum = u;
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sum = (sum << 7) - sum + (u >> 16);
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sum = (sum << 7) - sum + (u >> 32);
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sum = (sum << 7) - sum + (u >> 48);
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return sum;
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}
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#endif
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