1 files changed, 0 insertions, 96 deletions
diff --git a/getrandom/src/util.rs b/getrandom/src/util.rs
deleted file mode 100644
index e0e9307..0000000
--- a/getrandom/src/util.rs
+++ /dev/null
@@ -1,96 +0,0 @@
-// Copyright 2019 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.
-
-use core::sync::atomic::{AtomicUsize, Ordering::Relaxed};
-
-// This structure represents a lazily initialized static usize value. Useful
-// when it is preferable to just rerun initialization instead of locking.
-// Both unsync_init and sync_init will invoke an init() function until it
-// succeeds, then return the cached value for future calls.
-//
-// Both methods support init() "failing". If the init() method returns UNINIT,
-// that value will be returned as normal, but will not be cached.
-//
-// Users should only depend on the _value_ returned by init() functions.
-// Specifically, for the following init() function:
-//      fn init() -> usize {
-//          a();
-//          let v = b();
-//          c();
-//          v
-//      }
-// the effects of c() or writes to shared memory will not necessarily be
-// observed and additional synchronization methods with be needed.
-pub struct LazyUsize(AtomicUsize);
-
-impl LazyUsize {
-    pub const fn new() -> Self {
-        Self(AtomicUsize::new(Self::UNINIT))
-    }
-
-    // The initialization is not completed.
-    pub const UNINIT: usize = usize::max_value();
-    // The initialization is currently running.
-    pub const ACTIVE: usize = usize::max_value() - 1;
-
-    // Runs the init() function at least once, returning the value of some run
-    // of init(). Multiple callers can run their init() functions in parallel.
-    // init() should always return the same value, if it succeeds.
-    pub fn unsync_init(&self, init: impl FnOnce() -> usize) -> usize {
-        // Relaxed ordering is fine, as we only have a single atomic variable.
-        let mut val = self.0.load(Relaxed);
-        if val == Self::UNINIT {
-            val = init();
-            self.0.store(val, Relaxed);
-        }
-        val
-    }
-
-    // Synchronously runs the init() function. Only one caller will have their
-    // init() function running at a time, and exactly one successful call will
-    // be run. init() returning UNINIT or ACTIVE will be considered a failure,
-    // and future calls to sync_init will rerun their init() function.
-    pub fn sync_init(&self, init: impl FnOnce() -> usize, mut wait: impl FnMut()) -> usize {
-        // Common and fast path with no contention. Don't wast time on CAS.
-        match self.0.load(Relaxed) {
-            Self::UNINIT | Self::ACTIVE => {}
-            val => return val,
-        }
-        // Relaxed ordering is fine, as we only have a single atomic variable.
-        loop {
-            match self.0.compare_and_swap(Self::UNINIT, Self::ACTIVE, Relaxed) {
-                Self::UNINIT => {
-                    let val = init();
-                    self.0.store(
-                        match val {
-                            Self::UNINIT | Self::ACTIVE => Self::UNINIT,
-                            val => val,
-                        },
-                        Relaxed,
-                    );
-                    return val;
-                }
-                Self::ACTIVE => wait(),
-                val => return val,
-            }
-        }
-    }
-}
-
-// Identical to LazyUsize except with bool instead of usize.
-pub struct LazyBool(LazyUsize);
-
-impl LazyBool {
-    pub const fn new() -> Self {
-        Self(LazyUsize::new())
-    }
-
-    pub fn unsync_init(&self, init: impl FnOnce() -> bool) -> bool {
-        self.0.unsync_init(|| init() as usize) != 0
-    }
-}