diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/rust/foreign-types-shared | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/rust/foreign-types-shared')
-rw-r--r-- | third_party/rust/foreign-types-shared/.cargo-checksum.json | 1 | ||||
-rw-r--r-- | third_party/rust/foreign-types-shared/Cargo.toml | 21 | ||||
-rw-r--r-- | third_party/rust/foreign-types-shared/LICENSE-APACHE | 202 | ||||
-rw-r--r-- | third_party/rust/foreign-types-shared/LICENSE-MIT | 19 | ||||
-rw-r--r-- | third_party/rust/foreign-types-shared/src/lib.rs | 92 |
5 files changed, 335 insertions, 0 deletions
diff --git a/third_party/rust/foreign-types-shared/.cargo-checksum.json b/third_party/rust/foreign-types-shared/.cargo-checksum.json new file mode 100644 index 0000000000..c2aee3a118 --- /dev/null +++ b/third_party/rust/foreign-types-shared/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"096ac915be03aa1eb99b12ad4c5552a50bd550de4d1fb9a52e0799319f98f994","LICENSE-APACHE":"c6596eb7be8581c18be736c846fb9173b69eccf6ef94c5135893ec56bd92ba08","LICENSE-MIT":"333ea3aaa3cadb819f4acd9f9153f9feee060a995ca8710f32bc5bd9a4b91734","src/lib.rs":"60aa483e41abdbdc3b5057e3ff75abd63d0e92263d93a50d8fd739910a0b19e8"},"package":"aa9a19cbb55df58761df49b23516a86d432839add4af60fc256da840f66ed35b"}
\ No newline at end of file diff --git a/third_party/rust/foreign-types-shared/Cargo.toml b/third_party/rust/foreign-types-shared/Cargo.toml new file mode 100644 index 0000000000..e029e2c6d7 --- /dev/null +++ b/third_party/rust/foreign-types-shared/Cargo.toml @@ -0,0 +1,21 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies. +# +# If you are reading this file be aware that the original Cargo.toml +# will likely look very different (and much more reasonable). +# See Cargo.toml.orig for the original contents. + +[package] +edition = "2018" +name = "foreign-types-shared" +version = "0.3.1" +authors = ["Steven Fackler <sfackler@gmail.com>"] +description = "An internal crate used by foreign-types" +license = "MIT/Apache-2.0" +repository = "https://github.com/sfackler/foreign-types" + +[dependencies] diff --git a/third_party/rust/foreign-types-shared/LICENSE-APACHE b/third_party/rust/foreign-types-shared/LICENSE-APACHE new file mode 100644 index 0000000000..8f71f43fee --- /dev/null +++ b/third_party/rust/foreign-types-shared/LICENSE-APACHE @@ -0,0 +1,202 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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Internal crate used by foreign-types + +#![no_std] +#![warn(missing_docs)] +#![doc(html_root_url = "https://docs.rs/foreign-types-shared/0.3")] + +use core::cell::UnsafeCell; +use core::marker::PhantomData; +use core::mem; + +/// An opaque type used to define `ForeignTypeRef` types. +/// +/// A type implementing `ForeignTypeRef` should simply be a newtype wrapper around this type. +pub struct Opaque(PhantomData<UnsafeCell<*mut ()>>); + +/// A type implemented by wrappers over foreign types. +/// +/// # Safety +/// +/// Implementations of `ForeignType` must guarantee the following: +/// - `Self::from_ptr(x).as_ptr() == x` +/// - `Self::from_ptr(x).into_ptr(x) == x` +/// - `Self::from_ptr(x).deref().as_ptr(x) == x` +/// - `Self::from_ptr(x).deref_mut().as_ptr(x) == x` +/// - `Self::from_ptr(x).as_ref().as_ptr(x) == x` +/// - `Self::from_ptr(x).as_mut().as_ptr(x) == x` +pub unsafe trait ForeignType: Sized { + /// The raw C type. + type CType; + + /// The type representing a reference to this type. + type Ref: ForeignTypeRef<CType = Self::CType>; + + /// Constructs an instance of this type from its raw type. + /// + /// # Safety + /// + /// `ptr` must be a valid, owned instance of the native type. + unsafe fn from_ptr(ptr: *mut Self::CType) -> Self; + + /// Returns a raw pointer to the wrapped value. + fn as_ptr(&self) -> *mut Self::CType; + + /// Consumes the wrapper and returns the raw pointer. + #[inline] + fn into_ptr(self) -> *mut Self::CType { + let ptr = self.as_ptr(); + mem::forget(self); + ptr + } +} + +/// A trait implemented by types which reference borrowed foreign types. +/// +/// # Safety +/// +/// Implementations of `ForeignTypeRef` must guarantee the following: +/// +/// - `Self::from_ptr(x).as_ptr() == x` +/// - `Self::from_mut_ptr(x).as_ptr() == x` +pub unsafe trait ForeignTypeRef: Sized { + /// The raw C type. + type CType; + + /// Constructs a shared instance of this type from its raw type. + /// + /// # Safety + /// + /// `ptr` must be a valid, immutable, instance of the type for the `'a` lifetime. + #[inline] + unsafe fn from_ptr<'a>(ptr: *mut Self::CType) -> &'a Self { + debug_assert!(!ptr.is_null()); + &*(ptr as *mut _) + } + + /// Constructs a mutable reference of this type from its raw type. + /// + /// # Safety + /// + /// `ptr` must be a valid, unique, instance of the type for the `'a` lifetime. + #[inline] + unsafe fn from_ptr_mut<'a>(ptr: *mut Self::CType) -> &'a mut Self { + debug_assert!(!ptr.is_null()); + &mut *(ptr as *mut _) + } + + /// Returns a raw pointer to the wrapped value. + #[inline] + fn as_ptr(&self) -> *mut Self::CType { + self as *const _ as *mut _ + } +} |