1 files changed, 78 insertions, 0 deletions
diff --git a/vendor/tracing-core/src/stdlib.rs b/vendor/tracing-core/src/stdlib.rs
new file mode 100644
index 000000000..741549519
--- /dev/null
+++ b/vendor/tracing-core/src/stdlib.rs
@@ -0,0 +1,78 @@
+//! Re-exports either the Rust `std` library or `core` and `alloc` when `std` is
+//! disabled.
+//!
+//! `crate::stdlib::...` should be used rather than `std::` when adding code that
+//! will be available with the standard library disabled.
+//!
+//! Note that this module is called `stdlib` rather than `std`, as Rust 1.34.0
+//! does not permit redefining the name `stdlib` (although this works on the
+//! latest stable Rust).
+#[cfg(feature = "std")]
+pub(crate) use std::*;
+
+#[cfg(not(feature = "std"))]
+pub(crate) use self::no_std::*;
+
+#[cfg(not(feature = "std"))]
+mod no_std {
+    // We pre-emptively export everything from libcore/liballoc, (even modules
+    // we aren't using currently) to make adding new code easier. Therefore,
+    // some of these imports will be unused.
+    #![allow(unused_imports)]
+
+    pub(crate) use core::{
+        any, array, ascii, cell, char, clone, cmp, convert, default, f32, f64, ffi, future, hash,
+        hint, i128, i16, i8, isize, iter, marker, mem, num, ops, option, pin, ptr, result, task,
+        time, u128, u16, u32, u8, usize,
+    };
+
+    pub(crate) use alloc::{boxed, collections, rc, string, vec};
+
+    pub(crate) mod borrow {
+        pub(crate) use alloc::borrow::*;
+        pub(crate) use core::borrow::*;
+    }
+
+    pub(crate) mod fmt {
+        pub(crate) use alloc::fmt::*;
+        pub(crate) use core::fmt::*;
+    }
+
+    pub(crate) mod slice {
+        pub(crate) use alloc::slice::*;
+        pub(crate) use core::slice::*;
+    }
+
+    pub(crate) mod str {
+        pub(crate) use alloc::str::*;
+        pub(crate) use core::str::*;
+    }
+
+    pub(crate) mod sync {
+        pub(crate) use crate::spin::MutexGuard;
+        pub(crate) use alloc::sync::*;
+        pub(crate) use core::sync::*;
+
+        /// This wraps `spin::Mutex` to return a `Result`, so that it can be
+        /// used with code written against `std::sync::Mutex`.
+        ///
+        /// Since `spin::Mutex` doesn't support poisoning, the `Result` returned
+        /// by `lock` will always be `Ok`.
+        #[derive(Debug, Default)]
+        pub(crate) struct Mutex<T> {
+            inner: crate::spin::Mutex<T>,
+        }
+
+        impl<T> Mutex<T> {
+            // pub(crate) fn new(data: T) -> Self {
+            //     Self {
+            //         inner: crate::spin::Mutex::new(data),
+            //     }
+            // }
+
+            pub(crate) fn lock(&self) -> Result<MutexGuard<'_, T>, ()> {
+                Ok(self.inner.lock())
+            }
+        }
+    }
+}