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Make wasi-common-std-sync's dependency on system-interface private. (#4784)

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* Make wasi-common-std-sync's dependency on system-interface private.

Change some `pub` functions which exposed system-interface types to be
non-`pub`.

And, change `from_sysif_fdflags` functions to `get_fd_flags` functions
that take `impl AsFilelike` arguments instead of system-interface types.

With these changes, system-interface is no longer exposed in the
public API.

* Add a public API for `is_read_write` too.

Implementors using types implementing `AsFilelike` may want to use the
same `is_read_write` logic, without explicitly depending on
system-interface, so provide a function that provides that.
This commit is contained in:
Dan Gohman
2022-08-26 11:39:00 -07:00
committed by GitHub
parent c1f9736938
commit a68fa86aad
3 changed files with 69 additions and 20 deletions
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24
crates/wasi-common/cap-std-sync/src/file.rs
View File

@@ -1,5 +1,6 @@
use cap_fs_ext::MetadataExt;
use fs_set_times::{SetTimes, SystemTimeSpec};
use io_lifetimes::AsFilelike;
use is_terminal::IsTerminal;
use std::any::Any;
use std::convert::TryInto;
@@ -48,8 +49,8 @@ impl WasiFile for File {
Ok(filetype_from(&meta.file_type()))
}
async fn get_fdflags(&mut self) -> Result<FdFlags, Error> {
let fdflags = self.0.get_fd_flags()?;
Ok(from_sysif_fdflags(fdflags))
let fdflags = get_fd_flags(&self.0)?;
Ok(fdflags)
}
async fn set_fdflags(&mut self, fdflags: FdFlags) -> Result<(), Error> {
if fdflags.intersects(
@@ -187,7 +188,10 @@ impl AsFd for File {
self.0.as_fd()
}
}
pub fn convert_systimespec(t: Option<wasi_common::SystemTimeSpec>) -> Option<SystemTimeSpec> {
pub(crate) fn convert_systimespec(
t: Option<wasi_common::SystemTimeSpec>,
) -> Option<SystemTimeSpec> {
match t {
Some(wasi_common::SystemTimeSpec::Absolute(t)) => {
Some(SystemTimeSpec::Absolute(t.into_std()))
@@ -197,7 +201,7 @@ pub fn convert_systimespec(t: Option<wasi_common::SystemTimeSpec>) -> Option<Sys
}
}
pub fn to_sysif_fdflags(f: wasi_common::file::FdFlags) -> system_interface::fs::FdFlags {
pub(crate) fn to_sysif_fdflags(f: wasi_common::file::FdFlags) -> system_interface::fs::FdFlags {
let mut out = system_interface::fs::FdFlags::empty();
if f.contains(wasi_common::file::FdFlags::APPEND) {
out |= system_interface::fs::FdFlags::APPEND;
@@ -216,7 +220,12 @@ pub fn to_sysif_fdflags(f: wasi_common::file::FdFlags) -> system_interface::fs::
}
out
}
pub fn from_sysif_fdflags(f: system_interface::fs::FdFlags) -> wasi_common::file::FdFlags {
/// Return the file-descriptor flags for a given file-like object.
///
/// This returns the flags needed to implement [`WasiFile::get_fdflags`].
pub fn get_fd_flags<Filelike: AsFilelike>(f: Filelike) -> io::Result<wasi_common::file::FdFlags> {
let f = f.as_filelike().get_fd_flags()?;
let mut out = wasi_common::file::FdFlags::empty();
if f.contains(system_interface::fs::FdFlags::APPEND) {
out |= wasi_common::file::FdFlags::APPEND;
@@ -233,9 +242,10 @@ pub fn from_sysif_fdflags(f: system_interface::fs::FdFlags) -> wasi_common::file
if f.contains(system_interface::fs::FdFlags::SYNC) {
out |= wasi_common::file::FdFlags::SYNC;
}
out
Ok(out)
}
pub fn convert_advice(advice: Advice) -> system_interface::fs::Advice {
fn convert_advice(advice: Advice) -> system_interface::fs::Advice {
match advice {
Advice::Normal => system_interface::fs::Advice::Normal,
Advice::Sequential => system_interface::fs::Advice::Sequential,