Simplify Cache wrapper to single type, impl Deref on it, fix all compilation errors...

[rust.git] / src / librustc_errors / lock.rs

diff --git a/src/librustc_errors/lock.rs b/src/librustc_errors/lock.rs
index ff323073c6235eb40da49f36e75d1e4f82127827..25a27d2cbd884d953c3e28e64c7f043d2db5e519 100644 (file)
--- a/src/librustc_errors/lock.rs
+++ b/src/librustc_errors/lock.rs
@@ -1,13 +1,3 @@
-// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.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.
-
 //! Bindings to acquire a global named lock.
 //!
 //! This is intended to be used to synchronize multiple compiler processes to
@@ -74,7 +64,7 @@ fn drop(&mut self) {
         //
         // This will silently create one if it doesn't already exist, or it'll
         // open up a handle to one if it already exists.
-        let mutex = CreateMutexA(0 as *mut _, 0, cname.as_ptr() as *const u8);
+        let mutex = CreateMutexA(std::ptr::null_mut(), 0, cname.as_ptr() as *const u8);
         if mutex.is_null() {
             panic!("failed to create global mutex named `{}`: {}",
                    name,