1 //! Platform-dependent platform abstraction.
3 //! The `std::sys` module is the abstracted interface through which
4 //! `std` talks to the underlying operating system. It has different
5 //! implementations for different operating system families, today
6 //! just Unix and Windows, and initial support for Redox.
8 //! The centralization of platform-specific code in this module is
9 //! enforced by the "platform abstraction layer" tidy script in
10 //! `tools/tidy/src/pal.rs`.
12 //! This module is closely related to the platform-independent system
13 //! integration code in `std::sys_common`. See that module's
14 //! documentation for details.
16 //! In the future it would be desirable for the independent
17 //! implementations of this module to be extracted to their own crates
18 //! that `std` can link to, thus enabling their implementation
19 //! out-of-tree via crate replacement. Though due to the complex
20 //! inter-dependencies within `std` that will be a challenging goal to
23 #![allow(missing_debug_implementations)]
26 if #[cfg(target_os = "vxworks")] {
28 pub use self::vxworks::*;
29 } else if #[cfg(unix)] {
31 pub use self::unix::*;
32 } else if #[cfg(windows)] {
34 pub use self::windows::*;
35 } else if #[cfg(target_os = "hermit")] {
37 pub use self::hermit::*;
38 } else if #[cfg(target_os = "wasi")] {
40 pub use self::wasi::*;
41 } else if #[cfg(target_arch = "wasm32")] {
43 pub use self::wasm::*;
44 } else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] {
49 pub use self::unsupported::*;
53 // Import essential modules from both platforms when documenting. These are
54 // then later used in the `std::os` module when documenting, for example,
55 // Windows when we're compiling for Linux.
60 // On unix we'll document what's already available
61 #[stable(feature = "rust1", since = "1.0.0")]
62 pub use self::ext as unix_ext;
63 } else if #[cfg(any(target_os = "hermit",
64 all(target_arch = "wasm32", not(target_os = "wasi")),
65 all(target_vendor = "fortanix", target_env = "sgx")))] {
66 // On non-WASI wasm right now the module below doesn't compile
67 // (missing things in `libc` which is empty) so just omit everything
68 // with an empty module
69 #[unstable(issue = "none", feature = "std_internals")]
70 #[allow(missing_docs)]
73 #[path = "unix/ext/mod.rs"]
81 // On windows we'll just be documenting what's already available
82 #[allow(missing_docs)]
83 #[stable(feature = "rust1", since = "1.0.0")]
84 pub use self::ext as windows_ext;
85 } else if #[cfg(any(target_os = "hermit",
86 all(target_arch = "wasm32", not(target_os = "wasi")),
87 all(target_vendor = "fortanix", target_env = "sgx")))] {
88 // On non-WASI wasm right now the shim below doesn't compile, so
90 #[unstable(issue = "none", feature = "std_internals")]
91 #[allow(missing_docs)]
92 pub mod windows_ext {}
94 // On all other platforms (aka linux/osx/etc) then pull in a "minimal"
95 // amount of windows goop which ends up compiling
97 #[path = "windows/compat.rs"]
100 #[path = "windows/c.rs"]
103 #[path = "windows/ext/mod.rs"]
110 if #[cfg(target_os = "wasi")] {
111 // On WASI we'll document what's already available
112 #[stable(feature = "wasi_ext_doc", since = "1.35.0")]
113 pub use self::ext as wasi_ext;
114 } else if #[cfg(any(target_os = "hermit",
115 target_arch = "wasm32",
116 all(target_vendor = "fortanix", target_env = "sgx")))] {
117 // On non-WASI wasm right now the module below doesn't compile
118 // (missing things in `libc` which is empty) so just omit everything
119 // with an empty module
120 #[unstable(issue = "none", feature = "std_internals")]
121 #[allow(missing_docs)]
124 // On other platforms like Windows document the bare bones of WASI
125 #[path = "wasi/ext/mod.rs"]
126 #[stable(feature = "wasi_ext_doc", since = "1.35.0")]