std: use `sync::RwLock` for internal statics

2 files changed, 7 insertions, 7 deletions

diff --git a/library/std/src/sys/unix/locks/mod.rs b/library/std/src/sys/unix/locks/mod.rs
index f5f92f69358..9bb314b7010 100644
--- a/library/std/src/sys/unix/locks/mod.rs
+++ b/library/std/src/sys/unix/locks/mod.rs
@@ -11,21 +11,21 @@ cfg_if::cfg_if! {
         mod futex_rwlock;
         mod futex_condvar;
         pub(crate) use futex_mutex::{Mutex, MovableMutex};
-        pub(crate) use futex_rwlock::{RwLock, MovableRwLock};
+        pub(crate) use futex_rwlock::MovableRwLock;
         pub(crate) use futex_condvar::MovableCondvar;
     } else if #[cfg(target_os = "fuchsia")] {
         mod fuchsia_mutex;
         mod futex_rwlock;
         mod futex_condvar;
         pub(crate) use fuchsia_mutex::{Mutex, MovableMutex};
-        pub(crate) use futex_rwlock::{RwLock, MovableRwLock};
+        pub(crate) use futex_rwlock::MovableRwLock;
         pub(crate) use futex_condvar::MovableCondvar;
     } else {
         mod pthread_mutex;
         mod pthread_rwlock;
         mod pthread_condvar;
         pub(crate) use pthread_mutex::{Mutex, MovableMutex};
-        pub(crate) use pthread_rwlock::{RwLock, MovableRwLock};
+        pub(crate) use pthread_rwlock::MovableRwLock;
         pub(crate) use pthread_condvar::MovableCondvar;
     }
 }
diff --git a/library/std/src/sys/unix/os.rs b/library/std/src/sys/unix/os.rs
index 46545a0839f..3c3770708b1 100644
--- a/library/std/src/sys/unix/os.rs
+++ b/library/std/src/sys/unix/os.rs
@@ -17,10 +17,10 @@ use crate::path::{self, PathBuf};
 use crate::ptr;
 use crate::slice;
 use crate::str;
+use crate::sync::{PoisonError, RwLock};
 use crate::sys::cvt;
 use crate::sys::fd;
 use crate::sys::memchr;
-use crate::sys_common::rwlock::{StaticRwLock, StaticRwLockReadGuard};
 use crate::vec;
 
 #[cfg(all(target_env = "gnu", not(target_os = "vxworks")))]
@@ -501,10 +501,10 @@ pub unsafe fn environ() -> *mut *const *const c_char {
     ptr::addr_of_mut!(environ)
 }
 
-static ENV_LOCK: StaticRwLock = StaticRwLock::new();
+static ENV_LOCK: RwLock<()> = RwLock::new(());
 
-pub fn env_read_lock() -> StaticRwLockReadGuard {
-    ENV_LOCK.read()
+pub fn env_read_lock() -> impl Drop {
+    ENV_LOCK.read().unwrap_or_else(PoisonError::into_inner)
 }
 
 /// Returns a vector of (variable, value) byte-vector pairs for all the