1 files changed, 0 insertions, 124 deletions
diff --git a/rand/src/rngs/thread.rs b/rand/src/rngs/thread.rs
deleted file mode 100644
index 2006f41..0000000
--- a/rand/src/rngs/thread.rs
+++ /dev/null
@@ -1,124 +0,0 @@
-// Copyright 2018 Developers of the Rand project.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! Thread-local random number generator
-
-use std::cell::UnsafeCell;
-use std::ptr::NonNull;
-
-use crate::{RngCore, CryptoRng, SeedableRng, Error};
-use crate::rngs::adapter::ReseedingRng;
-use crate::rngs::OsRng;
-use super::std::Core;
-
-// Rationale for using `UnsafeCell` in `ThreadRng`:
-//
-// Previously we used a `RefCell`, with an overhead of ~15%. There will only
-// ever be one mutable reference to the interior of the `UnsafeCell`, because
-// we only have such a reference inside `next_u32`, `next_u64`, etc. Within a
-// single thread (which is the definition of `ThreadRng`), there will only ever
-// be one of these methods active at a time.
-//
-// A possible scenario where there could be multiple mutable references is if
-// `ThreadRng` is used inside `next_u32` and co. But the implementation is
-// completely under our control. We just have to ensure none of them use
-// `ThreadRng` internally, which is nonsensical anyway. We should also never run
-// `ThreadRng` in destructors of its implementation, which is also nonsensical.
-
-
-// Number of generated bytes after which to reseed `ThreadRng`.
-// According to benchmarks, reseeding has a noticable impact with thresholds
-// of 32 kB and less. We choose 64 kB to avoid significant overhead.
-const THREAD_RNG_RESEED_THRESHOLD: u64 = 1024 * 64;
-
-/// The type returned by [`thread_rng`], essentially just a reference to the
-/// PRNG in thread-local memory.
-///
-/// `ThreadRng` uses the same PRNG as [`StdRng`] for security and performance.
-/// As hinted by the name, the generator is thread-local. `ThreadRng` is a
-/// handle to this generator and thus supports `Copy`, but not `Send` or `Sync`.
-///
-/// Unlike `StdRng`, `ThreadRng` uses the  [`ReseedingRng`] wrapper to reseed
-/// the PRNG from fresh entropy every 64 kiB of random data.
-/// [`OsRng`] is used to provide seed data.
-///
-/// Note that the reseeding is done as an extra precaution against side-channel
-/// attacks and mis-use (e.g. if somehow weak entropy were supplied initially).
-/// The PRNG algorithms used are assumed to be secure.
-///
-/// [`ReseedingRng`]: crate::rngs::adapter::ReseedingRng
-/// [`StdRng`]: crate::rngs::StdRng
-#[derive(Copy, Clone, Debug)]
-pub struct ThreadRng {
-    // inner raw pointer implies type is neither Send nor Sync
-    rng: NonNull<ReseedingRng<Core, OsRng>>,
-}
-
-thread_local!(
-    static THREAD_RNG_KEY: UnsafeCell<ReseedingRng<Core, OsRng>> = {
-        let r = Core::from_rng(OsRng).unwrap_or_else(|err|
-                panic!("could not initialize thread_rng: {}", err));
-        let rng = ReseedingRng::new(r,
-                                    THREAD_RNG_RESEED_THRESHOLD,
-                                    OsRng);
-        UnsafeCell::new(rng)
-    }
-);
-
-/// Retrieve the lazily-initialized thread-local random number generator,
-/// seeded by the system. Intended to be used in method chaining style,
-/// e.g. `thread_rng().gen::<i32>()`, or cached locally, e.g.
-/// `let mut rng = thread_rng();`.  Invoked by the `Default` trait, making
-/// `ThreadRng::default()` equivalent.
-///
-/// For more information see [`ThreadRng`].
-pub fn thread_rng() -> ThreadRng {
-    let raw = THREAD_RNG_KEY.with(|t| t.get());
-    let nn = NonNull::new(raw).unwrap();
-    ThreadRng { rng: nn }
-}
-
-impl Default for ThreadRng {
-    fn default() -> ThreadRng {
-        crate::prelude::thread_rng()
-    }
-}
-
-impl RngCore for ThreadRng {
-    #[inline(always)]
-    fn next_u32(&mut self) -> u32 {
-        unsafe { self.rng.as_mut().next_u32() }
-    }
-
-    #[inline(always)]
-    fn next_u64(&mut self) -> u64 {
-        unsafe { self.rng.as_mut().next_u64() }
-    }
-
-    fn fill_bytes(&mut self, dest: &mut [u8]) {
-        unsafe { self.rng.as_mut().fill_bytes(dest) }
-    }
-
-    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
-        unsafe { self.rng.as_mut().try_fill_bytes(dest) }
-    }
-}
-
-impl CryptoRng for ThreadRng {}
-
-
-#[cfg(test)]
-mod test {
-    #[test]
-    fn test_thread_rng() {
-        use crate::Rng;
-        let mut r = crate::thread_rng();
-        r.gen::<i32>();
-        assert_eq!(r.gen_range(0, 1), 0);
-    }
-}