apio
64f5078494
This time for real. Also, add a new per-user-task virtual address allocator (UserHeap), so that mmap'ed pages are in user range and can be copied.
26 lines
539 B
C++
26 lines
539 B
C++
#pragma once
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#include <stdint.h>
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struct UserHeap
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{
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bool init();
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uint64_t request_virtual_page();
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uint64_t request_virtual_pages(uint64_t count);
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void free_virtual_page(uint64_t address);
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void free_virtual_pages(uint64_t address, uint64_t count);
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void free();
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bool inherit(UserHeap& other);
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private:
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uint8_t* bitmap = nullptr;
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uint64_t bitmap_size = 0;
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uint64_t start_index = 0;
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bool bitmap_read(uint64_t index);
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void bitmap_set(uint64_t index, bool value);
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bool try_expand();
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}; |