std: rename Parker::new to Parker::new_in_place, add safe Parker::new constructor for SGX

library/std/src/sys_common/thread_parking/futex.rs

@@ -35,7 +35,7 @@ pub struct Parker {
 impl Parker {
     /// Construct the futex parker. The UNIX parker implementation
     /// requires this to happen in-place.
-    pub unsafe fn new(parker: *mut Parker) {
+    pub unsafe fn new_in_place(parker: *mut Parker) {
         parker.write(Self { state: AtomicU32::new(EMPTY) });
     }
 

library/std/src/sys_common/thread_parking/generic.rs

@@ -19,7 +19,7 @@ pub struct Parker {
 impl Parker {
     /// Construct the generic parker. The UNIX parker implementation
     /// requires this to happen in-place.
-    pub unsafe fn new(parker: *mut Parker) {
+    pub unsafe fn new_in_place(parker: *mut Parker) {
         parker.write(Parker {
             state: AtomicUsize::new(EMPTY),
             lock: Mutex::new(()),

library/std/src/sys_common/thread_parking/id.rs

@@ -26,9 +26,13 @@ const EMPTY: i8 = 0;
 const NOTIFIED: i8 = 1;
 
 impl Parker {
+    pub fn new() -> Parker {
+        Parker { state: AtomicI8::new(EMPTY), tid: UnsafeCell::new(None) }
+    }
+
     /// Create a new thread parker. UNIX requires this to happen in-place.
-    pub unsafe fn new(parker: *mut Parker) {
-        parker.write(Parker { state: AtomicI8::new(EMPTY), tid: UnsafeCell::new(None) })
+    pub unsafe fn new_in_place(parker: *mut Parker) {
+        parker.write(Parker::new())
     }
 
     /// # Safety

library/std/src/sys_common/thread_parking/wait_flag.rs

@@ -41,7 +41,7 @@ pub struct Parker {
 impl Parker {
     /// Construct a parker for the current thread. The UNIX parker
     /// implementation requires this to happen in-place.
-    pub unsafe fn new(parker: *mut Parker) {
+    pub unsafe fn new_in_place(parker: *mut Parker) {
         parker.write(Parker { state: AtomicI8::new(EMPTY), wait_flag: WaitFlag::new() })
     }