Trait PageAllocator 

pub trait PageAllocator: BaseAllocator {
    const PAGE_SIZE: usize;

    // Required methods
    fn alloc_pages(
        &mut self,
        num_pages: usize,
        align: usize,
    ) -> AllocResult<usize>;
    fn dealloc_pages(&mut self, pos: usize, num_pages: usize);
    fn alloc_pages_at(
        &mut self,
        base: usize,
        num_pages: usize,
        align: usize,
    ) -> AllocResult<usize>;
    fn total_pages(&self) -> usize;
    fn used_pages(&self) -> usize;
    fn available_pages(&self) -> usize;
}

Page-granularity allocator.

Required Associated Constants

const PAGE_SIZE: usize

The size of a memory page.

Required Methods

fn alloc_pages(&mut self, num_pages: usize, align: usize) -> AllocResult<usize>

Allocate contiguous memory pages with given count and byte alignment.

align is the requested alignment in bytes, not a log2/exponent.

fn dealloc_pages(&mut self, pos: usize, num_pages: usize)

Deallocate contiguous memory pages with given position and count.

fn alloc_pages_at( &mut self, base: usize, num_pages: usize, align: usize, ) -> AllocResult<usize>

Allocate contiguous memory pages with given base address, count and byte alignment.

align is the requested alignment in bytes, not a log2/exponent.

fn total_pages(&self) -> usize

Returns the total number of memory pages.

fn used_pages(&self) -> usize

Returns the number of allocated memory pages.

fn available_pages(&self) -> usize

Returns the number of available memory pages.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors