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Add FixedSizeBlockAllocator::fallback_alloc method

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Philipp Oppermann
2020-01-20 14:05:01 +01:00
parent 9b7326541e
commit d636939b51
1 changed files with 11 additions and 0 deletions
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11
src/allocator/fixed_size_block.rs
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@@ -1,3 +1,6 @@
use alloc::alloc::Layout;
use core::ptr;
/// The block sizes to use. /// The block sizes to use.
/// ///
/// The sizes must each be power of 2 because they are also used as /// The sizes must each be power of 2 because they are also used as
@@ -30,4 +33,12 @@ impl FixedSizeBlockAllocator {
pub unsafe fn init(&mut self, heap_start: usize, heap_size: usize) { pub unsafe fn init(&mut self, heap_start: usize, heap_size: usize) {
self.fallback_allocator.init(heap_start, heap_size); self.fallback_allocator.init(heap_start, heap_size);
} }
/// Allocates using the fallback allocator.
fn fallback_alloc(&mut self, layout: Layout) -> *mut u8 {
match self.fallback_allocator.allocate_first_fit(layout) {
Ok(ptr) => ptr.as_ptr(),
Err(_) => ptr::null_mut(),
}
}
} }