129 lines
4.1 KiB
Rust
129 lines
4.1 KiB
Rust
//! System bindings for the wasm/web platform
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//!
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//! This module contains the facade (aka platform-specific) implementations of
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//! OS level functionality for wasm. Note that this wasm is *not* the emscripten
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//! wasm, so we have no runtime here.
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//!
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//! This is all super highly experimental and not actually intended for
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//! wide/production use yet, it's still all in the experimental category. This
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//! will likely change over time.
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//!
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//! Currently all functions here are basically stubs that immediately return
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//! errors. The hope is that with a portability lint we can turn actually just
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//! remove all this and just omit parts of the standard library if we're
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//! compiling for wasm. That way it's a compile time error for something that's
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//! guaranteed to be a runtime error!
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use crate::io as std_io;
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use crate::mem;
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#[path = "../unix/alloc.rs"]
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pub mod alloc;
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pub mod args;
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#[path = "../unix/cmath.rs"]
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pub mod cmath;
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pub mod env;
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pub mod fd;
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pub mod fs;
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#[allow(unused)]
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#[path = "../wasm/atomics/futex.rs"]
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pub mod futex;
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pub mod io;
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pub mod net;
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pub mod os;
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#[path = "../unix/os_str.rs"]
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pub mod os_str;
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#[path = "../unix/path.rs"]
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pub mod path;
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#[path = "../unsupported/pipe.rs"]
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pub mod pipe;
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#[path = "../unsupported/process.rs"]
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pub mod process;
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pub mod stdio;
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pub mod thread;
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#[path = "../unsupported/thread_local_dtor.rs"]
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pub mod thread_local_dtor;
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#[path = "../unsupported/thread_local_key.rs"]
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pub mod thread_local_key;
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pub mod time;
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cfg_if::cfg_if! {
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if #[cfg(target_feature = "atomics")] {
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#[path = "../unix/locks"]
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pub mod locks {
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#![allow(unsafe_op_in_unsafe_fn)]
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mod futex_condvar;
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mod futex_mutex;
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mod futex_rwlock;
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pub(crate) use futex_condvar::Condvar;
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pub(crate) use futex_mutex::Mutex;
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pub(crate) use futex_rwlock::RwLock;
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}
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} else {
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#[path = "../unsupported/locks/mod.rs"]
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pub mod locks;
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#[path = "../unsupported/once.rs"]
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pub mod once;
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#[path = "../unsupported/thread_parking.rs"]
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pub mod thread_parking;
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}
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}
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#[path = "../unsupported/common.rs"]
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#[deny(unsafe_op_in_unsafe_fn)]
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#[allow(unused)]
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mod common;
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pub use common::*;
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#[inline]
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pub fn is_interrupted(errno: i32) -> bool {
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errno == wasi::ERRNO_INTR.raw().into()
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}
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pub fn decode_error_kind(errno: i32) -> std_io::ErrorKind {
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use std_io::ErrorKind::*;
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if errno > u16::MAX as i32 || errno < 0 {
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return Uncategorized;
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}
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match errno {
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e if e == wasi::ERRNO_CONNREFUSED.raw().into() => ConnectionRefused,
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e if e == wasi::ERRNO_CONNRESET.raw().into() => ConnectionReset,
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e if e == wasi::ERRNO_PERM.raw().into() || e == wasi::ERRNO_ACCES.raw().into() => {
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PermissionDenied
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}
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e if e == wasi::ERRNO_PIPE.raw().into() => BrokenPipe,
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e if e == wasi::ERRNO_NOTCONN.raw().into() => NotConnected,
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e if e == wasi::ERRNO_CONNABORTED.raw().into() => ConnectionAborted,
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e if e == wasi::ERRNO_ADDRNOTAVAIL.raw().into() => AddrNotAvailable,
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e if e == wasi::ERRNO_ADDRINUSE.raw().into() => AddrInUse,
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e if e == wasi::ERRNO_NOENT.raw().into() => NotFound,
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e if e == wasi::ERRNO_INTR.raw().into() => Interrupted,
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e if e == wasi::ERRNO_INVAL.raw().into() => InvalidInput,
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e if e == wasi::ERRNO_TIMEDOUT.raw().into() => TimedOut,
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e if e == wasi::ERRNO_EXIST.raw().into() => AlreadyExists,
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e if e == wasi::ERRNO_AGAIN.raw().into() => WouldBlock,
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e if e == wasi::ERRNO_NOSYS.raw().into() => Unsupported,
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e if e == wasi::ERRNO_NOMEM.raw().into() => OutOfMemory,
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_ => Uncategorized,
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}
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}
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pub fn abort_internal() -> ! {
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unsafe { libc::abort() }
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}
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pub fn hashmap_random_keys() -> (u64, u64) {
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let mut ret = (0u64, 0u64);
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unsafe {
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let base = &mut ret as *mut (u64, u64) as *mut u8;
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let len = mem::size_of_val(&ret);
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wasi::random_get(base, len).expect("random_get failure");
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}
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return ret;
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}
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fn err2io(err: wasi::Errno) -> std_io::Error {
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std_io::Error::from_raw_os_error(err.raw().into())
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}
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