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//! Platform-dependent platform abstraction.
//! The `std::sys` module is the abstracted interface through which
//! `std` talks to the underlying operating system. It has different
//! implementations for different operating system families, today
//! just Unix and Windows, and initial support for Redox.
//! The centralization of platform-specific code in this module is
//! enforced by the "platform abstraction layer" tidy script in
//! `tools/tidy/src/`.
//! This module is closely related to the platform-independent system
//! integration code in `std::sys_common`. See that module's
//! documentation for details.
//! In the future it would be desirable for the independent
//! implementations of this module to be extracted to their own crates
//! that `std` can link to, thus enabling their implementation
//! out-of-tree via crate replacement. Though due to the complex
//! inter-dependencies within `std` that will be a challenging goal to
//! achieve.
cfg_if::cfg_if! {
if #[cfg(target_os = "vxworks")] {
mod vxworks;
pub use self::vxworks::*;
} else if #[cfg(unix)] {
mod unix;
pub use self::unix::*;
} else if #[cfg(windows)] {
mod windows;
pub use self::windows::*;
} else if #[cfg(target_os = "cloudabi")] {
mod cloudabi;
pub use self::cloudabi::*;
} else if #[cfg(target_os = "hermit")] {
mod hermit;
pub use self::hermit::*;
} else if #[cfg(target_os = "wasi")] {
mod wasi;
pub use self::wasi::*;
} else if #[cfg(target_arch = "wasm32")] {
mod wasm;
pub use self::wasm::*;
} else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] {
mod sgx;
pub use self::sgx::*;
} else {
compile_error!("libstd doesn't compile for this platform yet");
// Import essential modules from both platforms when documenting. These are
// then later used in the `std::os` module when documenting, for example,
// Windows when we're compiling for Linux.
cfg_if::cfg_if! {
if #[cfg(unix)] {
// On unix we'll document what's already available
#[stable(feature = "rust1", since = "1.0.0")]
pub use self::ext as unix_ext;
} else if #[cfg(any(target_os = "cloudabi",
target_os = "hermit",
target_arch = "wasm32",
all(target_vendor = "fortanix", target_env = "sgx")))] {
// On CloudABI and wasm right now the module below doesn't compile
// (missing things in `libc` which is empty) so just omit everything
// with an empty module
#[unstable(issue = "none", feature = "std_internals")]
pub mod unix_ext {}
} else {
// On other platforms like Windows document the bare bones of unix
use crate::os::linux as platform;
#[path = "unix/ext/"]
pub mod unix_ext;
cfg_if::cfg_if! {
if #[cfg(windows)] {
// On windows we'll just be documenting what's already available
#[stable(feature = "rust1", since = "1.0.0")]
pub use self::ext as windows_ext;
} else if #[cfg(any(target_os = "cloudabi",
target_arch = "wasm32",
all(target_vendor = "fortanix", target_env = "sgx")))] {
// On CloudABI and wasm right now the shim below doesn't compile, so
// just omit it
#[unstable(issue = "none", feature = "std_internals")]
pub mod windows_ext {}
} else {
// On all other platforms (aka linux/osx/etc) then pull in a "minimal"
// amount of windows goop which ends up compiling
#[path = "windows/"]
mod compat;
#[path = "windows/"]
mod c;
#[path = "windows/ext/"]
pub mod windows_ext;