95c2addf15
* Compile wasi-common to Emscripten This commit enables cross-compiling of `wasi-common` to Emscripten. To achieve this, this commit does quite a bit reshuffling in the existing codebase. Namely, * rename `linux` modules in `wasi-common` and `yanix` to `linux_like` -- this is needed so that we can separate out logic specific to Linux and Emscripten out * tweak `dir` module in `yanix` to support Emscripten -- in particular, the main change involves `SeekLoc::from_raw` which has to be now host-specific, and is now fallible * tweak `filetime` so that in Emscripten we never check for existence of `utimensat` at runtime since we are guaranteed for it to exist by design * since `utimes` and `futimes` are not present in Emscripten, move them into a separate module, `utimesat`, and tag it cfg-non-emscripten only * finally, `to_timespec` is now fallible since on Emscripten we have to cast number of seconds, `FileTime::seconds` from `i64` to `libc::c_long` which resolves to `i32` unlike on other nixes * Fix macos build * Verify wasi-common compiles to Emscripten This commit adds `emscripten` job to Github Actions which installs `wasm32-unknown-emscripten` target, and builds `wasi-common` crate. * Use #[path] to cherry-pick mods for Emscripten This commit effectively reverses the reorg introduced in 145f4a5 in that it ditches `linux_like` mod for separate mods `linux` and `emscripten` which are now on the same crate level, and instead, pulls in common bits from `linux` using the `#[path = ..]` proc macro.
68 lines
2.5 KiB
Rust
68 lines
2.5 KiB
Rust
//! This internal module consists of helper types and functions for dealing
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//! with setting the file times (mainly in `path_filestat_set_times` syscall for now).
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//!
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//! The vast majority of the code contained within and in platform-specific implementations
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//! (`super::linux::filetime` and `super::bsd::filetime`) is based on the [filetime] crate.
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//! Kudos @alexcrichton!
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//!
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//! [filetime]: https://github.com/alexcrichton/filetime
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use crate::old::snapshot_0::Result;
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use std::convert::TryInto;
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pub(crate) use super::sys_impl::filetime::*;
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cfg_if::cfg_if! {
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if #[cfg(not(target_os = "emscripten"))] {
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fn filetime_to_timespec(ft: &filetime::FileTime) -> Result<libc::timespec> {
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Ok(
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libc::timespec {
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tv_sec: ft.seconds(),
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tv_nsec: ft.nanoseconds().try_into()?,
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}
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)
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}
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} else {
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fn filetime_to_timespec(ft: &filetime::FileTime) -> Result<libc::timespec> {
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Ok(
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libc::timespec {
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tv_sec: ft.seconds().try_into()?,
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tv_nsec: ft.nanoseconds().try_into()?,
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}
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)
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}
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}
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}
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/// A wrapper `enum` around `filetime::FileTime` struct, but unlike the original, this
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/// type allows the possibility of specifying `FileTime::Now` as a valid enumeration which,
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/// in turn, if `utimensat` is available on the host, will use a special const setting
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/// `UTIME_NOW`.
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#[derive(Debug, Copy, Clone)]
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pub(crate) enum FileTime {
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Now,
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Omit,
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FileTime(filetime::FileTime),
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}
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/// Converts `FileTime` to `libc::timespec`. If `FileTime::Now` variant is specified, this
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/// resolves to `UTIME_NOW` special const, `FileTime::Omit` variant resolves to `UTIME_OMIT`, and
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/// `FileTime::FileTime(ft)` where `ft := filetime::FileTime` uses [filetime] crate's original
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/// implementation which can be found here: [filetime::unix::to_timespec].
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///
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/// [filetime]: https://github.com/alexcrichton/filetime
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/// [filetime::unix::to_timespec]: https://github.com/alexcrichton/filetime/blob/master/src/unix/mod.rs#L30
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pub(crate) fn to_timespec(ft: &FileTime) -> Result<libc::timespec> {
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let ts = match ft {
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FileTime::Now => libc::timespec {
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tv_sec: 0,
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tv_nsec: UTIME_NOW,
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},
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FileTime::Omit => libc::timespec {
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tv_sec: 0,
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tv_nsec: UTIME_OMIT,
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},
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FileTime::FileTime(ft) => filetime_to_timespec(ft)?,
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};
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Ok(ts)
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}
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