1 files changed, 100 insertions, 0 deletions
diff --git a/library/std/src/sys/wasi/mod.rs b/library/std/src/sys/wasi/mod.rs
new file mode 100644
index 000000000..683a07a34
--- /dev/null
+++ b/library/std/src/sys/wasi/mod.rs
@@ -0,0 +1,100 @@
+//! System bindings for the wasm/web platform
+//!
+//! This module contains the facade (aka platform-specific) implementations of
+//! OS level functionality for wasm. Note that this wasm is *not* the emscripten
+//! wasm, so we have no runtime here.
+//!
+//! This is all super highly experimental and not actually intended for
+//! wide/production use yet, it's still all in the experimental category. This
+//! will likely change over time.
+//!
+//! Currently all functions here are basically stubs that immediately return
+//! errors. The hope is that with a portability lint we can turn actually just
+//! remove all this and just omit parts of the standard library if we're
+//! compiling for wasm. That way it's a compile time error for something that's
+//! guaranteed to be a runtime error!
+
+use crate::io as std_io;
+use crate::mem;
+
+#[path = "../unix/alloc.rs"]
+pub mod alloc;
+pub mod args;
+#[path = "../unix/cmath.rs"]
+pub mod cmath;
+pub mod env;
+pub mod fd;
+pub mod fs;
+pub mod io;
+#[path = "../unsupported/locks/mod.rs"]
+pub mod locks;
+pub mod net;
+pub mod os;
+#[path = "../unix/os_str.rs"]
+pub mod os_str;
+#[path = "../unix/path.rs"]
+pub mod path;
+#[path = "../unsupported/pipe.rs"]
+pub mod pipe;
+#[path = "../unsupported/process.rs"]
+pub mod process;
+pub mod stdio;
+pub mod thread;
+#[path = "../unsupported/thread_local_dtor.rs"]
+pub mod thread_local_dtor;
+#[path = "../unsupported/thread_local_key.rs"]
+pub mod thread_local_key;
+pub mod time;
+
+#[path = "../unsupported/common.rs"]
+#[deny(unsafe_op_in_unsafe_fn)]
+#[allow(unused)]
+mod common;
+pub use common::*;
+
+pub fn decode_error_kind(errno: i32) -> std_io::ErrorKind {
+    use std_io::ErrorKind::*;
+    if errno > u16::MAX as i32 || errno < 0 {
+        return Uncategorized;
+    }
+
+    match errno {
+        e if e == wasi::ERRNO_CONNREFUSED.raw().into() => ConnectionRefused,
+        e if e == wasi::ERRNO_CONNRESET.raw().into() => ConnectionReset,
+        e if e == wasi::ERRNO_PERM.raw().into() || e == wasi::ERRNO_ACCES.raw().into() => {
+            PermissionDenied
+        }
+        e if e == wasi::ERRNO_PIPE.raw().into() => BrokenPipe,
+        e if e == wasi::ERRNO_NOTCONN.raw().into() => NotConnected,
+        e if e == wasi::ERRNO_CONNABORTED.raw().into() => ConnectionAborted,
+        e if e == wasi::ERRNO_ADDRNOTAVAIL.raw().into() => AddrNotAvailable,
+        e if e == wasi::ERRNO_ADDRINUSE.raw().into() => AddrInUse,
+        e if e == wasi::ERRNO_NOENT.raw().into() => NotFound,
+        e if e == wasi::ERRNO_INTR.raw().into() => Interrupted,
+        e if e == wasi::ERRNO_INVAL.raw().into() => InvalidInput,
+        e if e == wasi::ERRNO_TIMEDOUT.raw().into() => TimedOut,
+        e if e == wasi::ERRNO_EXIST.raw().into() => AlreadyExists,
+        e if e == wasi::ERRNO_AGAIN.raw().into() => WouldBlock,
+        e if e == wasi::ERRNO_NOSYS.raw().into() => Unsupported,
+        e if e == wasi::ERRNO_NOMEM.raw().into() => OutOfMemory,
+        _ => Uncategorized,
+    }
+}
+
+pub fn abort_internal() -> ! {
+    unsafe { libc::abort() }
+}
+
+pub fn hashmap_random_keys() -> (u64, u64) {
+    let mut ret = (0u64, 0u64);
+    unsafe {
+        let base = &mut ret as *mut (u64, u64) as *mut u8;
+        let len = mem::size_of_val(&ret);
+        wasi::random_get(base, len).expect("random_get failure");
+    }
+    return ret;
+}
+
+fn err2io(err: wasi::Errno) -> std_io::Error {
+    std_io::Error::from_raw_os_error(err.raw().into())
+}