| //! 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::os::raw::c_char; |
| |
| pub mod alloc; |
| pub mod args; |
| pub mod cmath; |
| pub mod env; |
| pub mod fast_thread_local; |
| pub mod fs; |
| pub mod io; |
| pub mod memchr; |
| pub mod net; |
| pub mod os; |
| pub mod path; |
| pub mod pipe; |
| pub mod process; |
| pub mod stack_overflow; |
| pub mod stdio; |
| pub mod thread; |
| pub mod thread_local; |
| pub mod time; |
| |
| pub use crate::sys_common::os_str_bytes as os_str; |
| |
| cfg_if::cfg_if! { |
| if #[cfg(target_feature = "atomics")] { |
| #[path = "condvar_atomics.rs"] |
| pub mod condvar; |
| #[path = "mutex_atomics.rs"] |
| pub mod mutex; |
| #[path = "rwlock_atomics.rs"] |
| pub mod rwlock; |
| } else { |
| pub mod condvar; |
| pub mod mutex; |
| pub mod rwlock; |
| } |
| } |
| |
| #[cfg(not(test))] |
| pub fn init() {} |
| |
| pub fn unsupported<T>() -> crate::io::Result<T> { |
| Err(unsupported_err()) |
| } |
| |
| pub fn unsupported_err() -> crate::io::Error { |
| crate::io::Error::new(crate::io::ErrorKind::Other, "operation not supported on wasm yet") |
| } |
| |
| pub fn decode_error_kind(_code: i32) -> crate::io::ErrorKind { |
| crate::io::ErrorKind::Other |
| } |
| |
| // This enum is used as the storage for a bunch of types which can't actually |
| // exist. |
| #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)] |
| pub enum Void {} |
| |
| pub unsafe fn strlen(mut s: *const c_char) -> usize { |
| let mut n = 0; |
| while *s != 0 { |
| n += 1; |
| s = s.offset(1); |
| } |
| return n; |
| } |
| |
| pub unsafe fn abort_internal() -> ! { |
| crate::arch::wasm32::unreachable() |
| } |
| |
| // We don't have randomness yet, but I totally used a random number generator to |
| // generate these numbers. |
| // |
| // More seriously though this is just for DOS protection in hash maps. It's ok |
| // if we don't do that on wasm just yet. |
| pub fn hashmap_random_keys() -> (u64, u64) { |
| (1, 2) |
| } |