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1 |
| -//! Platform-dependent platform abstraction. |
2 |
| -//! |
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. |
7 |
| -//! |
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`. |
11 |
| -//! |
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. |
15 |
| -//! |
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 |
21 |
| -//! achieve. |
22 |
| -
|
23 |
| -#![allow(missing_debug_implementations)] |
24 |
| - |
25 |
| -pub mod common; |
26 |
| -mod personality; |
27 |
| - |
28 |
| -cfg_if::cfg_if! { |
29 |
| - if #[cfg(unix)] { |
30 |
| - mod unix; |
31 |
| - pub use self::unix::*; |
32 |
| - } else if #[cfg(windows)] { |
33 |
| - mod windows; |
34 |
| - pub use self::windows::*; |
35 |
| - } else if #[cfg(target_os = "solid_asp3")] { |
36 |
| - mod solid; |
37 |
| - pub use self::solid::*; |
38 |
| - } else if #[cfg(target_os = "hermit")] { |
39 |
| - mod hermit; |
40 |
| - pub use self::hermit::*; |
41 |
| - } else if #[cfg(target_os = "wasi")] { |
42 |
| - mod wasi; |
43 |
| - pub use self::wasi::*; |
44 |
| - } else if #[cfg(target_family = "wasm")] { |
45 |
| - mod wasm; |
46 |
| - pub use self::wasm::*; |
47 |
| - } else if #[cfg(target_os = "xous")] { |
48 |
| - mod xous; |
49 |
| - pub use self::xous::*; |
50 |
| - } else if #[cfg(target_os = "uefi")] { |
51 |
| - mod uefi; |
52 |
| - pub use self::uefi::*; |
53 |
| - } else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] { |
54 |
| - mod sgx; |
55 |
| - pub use self::sgx::*; |
56 |
| - } else if #[cfg(target_os = "teeos")] { |
57 |
| - mod teeos; |
58 |
| - pub use self::teeos::*; |
59 |
| - } else { |
60 |
| - mod unsupported; |
61 |
| - pub use self::unsupported::*; |
62 |
| - } |
63 |
| -} |
64 |
| - |
65 |
| -cfg_if::cfg_if! { |
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| - // Fuchsia components default to full backtrace. |
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| - if #[cfg(target_os = "fuchsia")] { |
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| - pub const FULL_BACKTRACE_DEFAULT: bool = true; |
69 |
| - } else { |
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| - pub const FULL_BACKTRACE_DEFAULT: bool = false; |
71 |
| - } |
72 |
| -} |
73 |
| - |
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| -#[cfg(not(test))] |
75 |
| -cfg_if::cfg_if! { |
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| - if #[cfg(target_os = "android")] { |
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| - pub use self::android::log2f32; |
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| - pub use self::android::log2f64; |
79 |
| - } else { |
80 |
| - #[inline] |
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| - pub fn log2f32(n: f32) -> f32 { |
82 |
| - unsafe { crate::intrinsics::log2f32(n) } |
83 |
| - } |
84 |
| - |
85 |
| - #[inline] |
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| - pub fn log2f64(n: f64) -> f64 { |
87 |
| - unsafe { crate::intrinsics::log2f64(n) } |
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| - } |
89 |
| - } |
90 |
| -} |
91 |
| - |
92 |
| -// Solaris/Illumos requires a wrapper around log, log2, and log10 functions |
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| -// because of their non-standard behavior (e.g., log(-n) returns -Inf instead |
94 |
| -// of expected NaN). |
95 |
| -#[cfg(not(test))] |
96 |
| -#[cfg(any(target_os = "solaris", target_os = "illumos"))] |
97 |
| -#[inline] |
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| -pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 { |
99 |
| - if n.is_finite() { |
100 |
| - if n > 0.0 { |
101 |
| - log_fn(n) |
102 |
| - } else if n == 0.0 { |
103 |
| - f64::NEG_INFINITY // log(0) = -Inf |
104 |
| - } else { |
105 |
| - f64::NAN // log(-n) = NaN |
106 |
| - } |
107 |
| - } else if n.is_nan() { |
108 |
| - n // log(NaN) = NaN |
109 |
| - } else if n > 0.0 { |
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| - n // log(Inf) = Inf |
111 |
| - } else { |
112 |
| - f64::NAN // log(-Inf) = NaN |
113 |
| - } |
114 |
| -} |
115 |
| - |
116 |
| -#[cfg(not(test))] |
117 |
| -#[cfg(not(any(target_os = "solaris", target_os = "illumos")))] |
118 |
| -#[inline] |
119 |
| -pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 { |
120 |
| - log_fn(n) |
121 |
| -} |
122 |
| - |
123 |
| -#[cfg(not(target_os = "uefi"))] |
124 |
| -pub type RawOsError = i32; |
| 1 | +/// The PAL (platform abstraction layer) contains platform-specific abstractions |
| 2 | +/// for implementing the features in the other submodules, e.g. UNIX file |
| 3 | +/// descriptors. |
| 4 | +mod pal; |
| 5 | + |
| 6 | +// FIXME(117276): remove this, move feature implementations into individual |
| 7 | +// submodules. |
| 8 | +pub use pal::*; |
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