Vendor things

third-party/vendor/parking_lot/src/raw_fair_mutex.rs

@@ -0,0 +1,65 @@
+// Copyright 2016 Amanieu d'Antras
+//
+// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
+// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
+// http://opensource.org/licenses/MIT>, at your option. This file may not be
+// copied, modified, or distributed except according to those terms.
+
+use crate::raw_mutex::RawMutex;
+use lock_api::RawMutexFair;
+
+/// Raw fair mutex type backed by the parking lot.
+pub struct RawFairMutex(RawMutex);
+
+unsafe impl lock_api::RawMutex for RawFairMutex {
+    const INIT: Self = RawFairMutex(<RawMutex as lock_api::RawMutex>::INIT);
+
+    type GuardMarker = <RawMutex as lock_api::RawMutex>::GuardMarker;
+
+    #[inline]
+    fn lock(&self) {
+        self.0.lock()
+    }
+
+    #[inline]
+    fn try_lock(&self) -> bool {
+        self.0.try_lock()
+    }
+
+    #[inline]
+    unsafe fn unlock(&self) {
+        self.unlock_fair()
+    }
+
+    #[inline]
+    fn is_locked(&self) -> bool {
+        self.0.is_locked()
+    }
+}
+
+unsafe impl lock_api::RawMutexFair for RawFairMutex {
+    #[inline]
+    unsafe fn unlock_fair(&self) {
+        self.0.unlock_fair()
+    }
+
+    #[inline]
+    unsafe fn bump(&self) {
+        self.0.bump()
+    }
+}
+
+unsafe impl lock_api::RawMutexTimed for RawFairMutex {
+    type Duration = <RawMutex as lock_api::RawMutexTimed>::Duration;
+    type Instant = <RawMutex as lock_api::RawMutexTimed>::Instant;
+
+    #[inline]
+    fn try_lock_until(&self, timeout: Self::Instant) -> bool {
+        self.0.try_lock_until(timeout)
+    }
+
+    #[inline]
+    fn try_lock_for(&self, timeout: Self::Duration) -> bool {
+        self.0.try_lock_for(timeout)
+    }
+}