453feb6f82
This commit removes methods that are never used between crates or trait impls like `Clone` which may have been used one day but are no longer used.
37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
use serde::{Deserialize, Serialize};
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/// A map for determining where live GC references live in a stack frame.
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///
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/// Note that this is currently primarily documented as cranelift's
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/// `binemit::StackMap`, so for detailed documentation about this please read
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/// the docs over there.
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#[derive(Debug, Serialize, Deserialize)]
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pub struct StackMap {
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bits: Box<[u32]>,
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mapped_words: u32,
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}
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impl StackMap {
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/// Creates a new `StackMap`, typically from a preexisting
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/// `binemit::StackMap`.
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pub fn new(mapped_words: u32, bits: impl Iterator<Item = u32>) -> StackMap {
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StackMap {
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bits: bits.collect(),
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mapped_words,
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}
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}
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/// Returns a specified bit.
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pub fn get_bit(&self, bit_index: usize) -> bool {
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assert!(bit_index < 32 * self.bits.len());
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let word_index = bit_index / 32;
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let word_offset = bit_index % 32;
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(self.bits[word_index] & (1 << word_offset)) != 0
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}
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/// Returns the number of words represented by this stack map.
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pub fn mapped_words(&self) -> u32 {
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self.mapped_words
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}
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}
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