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Add support for
wasm32-wasip1 and wasm32-wasip2, remove support f…
…or `wasm32-wasi`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,9 +1,41 @@ | ||
| //! Implementation for WASI | ||
| //! Implementation for WASI (preview 1 and 2) | ||
| //! | ||
| //! `target_env = "p1"` was introduced only in Rust 1.80, so on earlier compiler versions this | ||
| //! code will result in a compilation error. | ||
| use crate::Error; | ||
| use core::mem::MaybeUninit; | ||
| use wasi::random_get; | ||
|
|
||
| #[cfg(not(any(target_env = "p1", target_env = "p2")))] | ||
| compile_error!( | ||
| "Unknown version of WASI (only previews 1 and 2 are supported) \ | ||
| or Rust version older than 1.80 was used" | ||
| ); | ||
|
|
||
| #[cfg(target_env = "p1")] | ||
| pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> { | ||
| unsafe { random_get(dest.as_mut_ptr().cast::<u8>(), dest.len()) } | ||
| unsafe { wasi::random_get(dest.as_mut_ptr().cast::<u8>(), dest.len()) } | ||
| .map_err(|e| Error::from_os_error(e.raw().into())) | ||
| } | ||
|
|
||
| #[cfg(target_env = "p2")] | ||
| pub fn getrandom_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> { | ||
| use wasi::random::random::get_random_u64; | ||
|
|
||
| let mut chunks = dest.chunks_exact_mut(size_of::<u64>()); | ||
| for chunk in &mut chunks { | ||
| let dst: *mut u64 = chunk.as_mut_ptr().cast(); | ||
| let val = get_random_u64(); | ||
| unsafe { | ||
| core::ptr::write_unaligned(dst, val); | ||
| } | ||
| } | ||
|
|
||
| let rem = chunks.into_remainder(); | ||
| let val = get_random_u64(); | ||
| let src = &val as *const u64; | ||
| unsafe { | ||
| core::ptr::copy_nonoverlapping(src.cast(), rem.as_mut_ptr(), rem.len()); | ||
| } | ||
|
|
||
| Ok(()) | ||
| } |