scx_rustland_core::alloc

Struct BuddyAlloc

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pub struct BuddyAlloc {
    base_addr: usize,
    end_addr: usize,
    unavailable: usize,
    entries: *mut Entry,
    entries_size: usize,
    leaf2base: usize,
}

Fields§

§base_addr: usize

memory start addr

§end_addr: usize

memory end addr

§unavailable: usize

unavailable memories at end_addr

§entries: *mut Entry§entries_size: usize§leaf2base: usize

min size of a block, represent in 1 << leaf2base

Implementations§

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impl BuddyAlloc

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pub unsafe fn new(param: BuddyAllocParam) -> Self

§Safety

The base_addr..(base_addr + len) must be allocated before using, and must guarantee no others write to the memory range, to avoid undefined behaviors. The new function panic if memory space not enough for initialize BuddyAlloc.

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fn init_free_list(&mut self)

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pub fn malloc(&mut self, nbytes: usize) -> *mut u8

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pub fn free(&mut self, p: *mut u8)

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fn entry(&self, i: usize) -> &Entry

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fn find_k_for_p(&self, p: *const u8) -> usize

find k for p

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fn block_index(&self, k: usize, p: *const u8) -> usize

block index of p under k

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fn block_addr(&self, k: usize, i: usize) -> usize

block addr of index under k

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