Sha256: 561342e22a194e515cc25c9a1bcd827ca24c4db033e9e2c4266fbdd2fb16e5bc
Contents?: true
Size: 860 Bytes
Versions: 2
Compression:
Stored size: 860 Bytes
Contents
// Set the length of the vec when the `SetLenOnDrop` value goes out of scope. // // The idea is: The length field in SetLenOnDrop is a local variable // that the optimizer will see does not alias with any stores through the Vec's data // pointer. This is a workaround for alias analysis issue #32155 pub(super) struct SetLenOnDrop<'a> { len: &'a mut usize, local_len: usize, } impl<'a> SetLenOnDrop<'a> { #[inline(always)] pub(super) fn new(len: &'a mut usize) -> Self { SetLenOnDrop { local_len: *len, len, } } #[inline(always)] pub(super) fn increment_len(&mut self, increment: usize) { self.local_len += increment; } } impl Drop for SetLenOnDrop<'_> { #[inline(always)] fn drop(&mut self) { *self.len = self.local_len; } }
Version data entries
2 entries across 2 versions & 1 rubygems
Version | Path |
---|---|
wasmtime-29.0.0 | ./ext/cargo-vendor/allocator-api2-0.2.21/src/stable/vec/set_len_on_drop.rs |
wasmtime-28.0.0 | ./ext/cargo-vendor/allocator-api2-0.2.21/src/stable/vec/set_len_on_drop.rs |