fix: fix feature "alloc_trait" to adapt to the current Rust Allocator API #37
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Temporarily close. I'll reopen it when my fork repo is stable. |
BusyJay
reviewed
Feb 20, 2023
| unsafe fn alloc(&mut self, layout: Layout) -> Result<NonNull<u8>, AllocErr> { | ||
| NonNull::new(GlobalAlloc::alloc(self, layout)).ok_or(AllocErr) | ||
| fn alloc_impl(&self, layout: Layout, zeroed: bool) -> Result<NonNull<[u8]>, AllocError> { | ||
| match layout.size() { |
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Better use if/else and check non-zero first.
| let raw_ptr = GlobalAlloc::realloc(self, ptr.as_ptr(), old_layout, new_size); | ||
| let ptr = NonNull::new(raw_ptr).ok_or(AllocError)?; | ||
| if zeroed { | ||
| raw_ptr.add(old_size).write_bytes(0, new_size - old_size); |
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Should use realloc(ptr, flags | MALLOCX_ZERO.
| ) -> Result<NonNull<u8>, AllocErr> { | ||
| NonNull::new(GlobalAlloc::realloc(self, ptr.as_ptr(), layout, new_size)).ok_or(AllocErr) | ||
| fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> { | ||
| self.alloc_impl(layout, false) |
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As these are not complicated functions, Instead of extracting an impl method, implementing them in the function directly seems more clear.
| if layout.size() != 0 { | ||
| // SAFETY: `layout` is non-zero in size, | ||
| // other conditions must be upheld by the caller | ||
| unsafe { GlobalAlloc::dealloc(self, ptr.as_ptr(), layout) } |
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You can call self.dealloc directly.
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The
alloc_traitfeature cannot be compiled because it used deprecated APIcore::alloc::{Alloc, Excess}.Status:
alloc_traitcompilable.TODO (may be not in this PR):
growandshrink.growandshrink.