26 lines
886 B
Rust
26 lines
886 B
Rust
// This file is part of libfringe, a low-level green threading library.
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// Copyright (c) whitequark <whitequark@whitequark.org>
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// See the LICENSE file included in this distribution.
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/// SliceStack holds a non-guarded stack allocated elsewhere and provided as a mutable slice.
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///
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/// Any slice used in a SliceStack must adhere to the [Stack contract][contract].
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/// [contract]: trait.Stack.html
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#[derive(Debug)]
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pub struct SliceStack<'a>(pub &'a mut [u8]);
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impl<'a> ::stack::Stack for SliceStack<'a> {
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#[inline(always)]
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fn base(&self) -> *mut u8 {
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// The slice cannot wrap around the address space, so the conversion from usize
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// to isize will not wrap either.
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let len: isize = self.0.len() as isize;
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unsafe { self.limit().offset(len) }
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}
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#[inline(always)]
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fn limit(&self) -> *mut u8 {
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self.0.as_ptr() as *mut u8
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}
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}
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