std: support RwLock and thread parking on TEEOS

Author: joboet

library/std/src/sys/sync/rwlock/mod.rs

@@ -19,6 +19,7 @@ cfg_select! {
         all(target_os = "windows", target_vendor = "win7"),
         all(target_vendor = "fortanix", target_env = "sgx"),
         target_os = "xous",
+        target_os = "teeos",
     ) => {
         mod queue;
         pub use queue::RwLock;
@@ -27,10 +28,6 @@ cfg_select! {
         mod solid;
         pub use solid::RwLock;
     }
-    target_os = "teeos" => {
-        mod teeos;
-        pub use teeos::RwLock;
-    }
     _ => {
         mod no_threads;
         pub use no_threads::RwLock;

library/std/src/sys/sync/rwlock/teeos.rs

@@ -35,7 +35,10 @@ cfg_select! {
         mod xous;
         pub use xous::Parker;
     }
-    target_family = "unix" => {
+    any(
+        target_family = "unix",
+        target_os = "teeos",
+    ) => {
         mod pthread;
         pub use pthread::Parker;
     }

library/std/src/sys/sync/thread_parking/mod.rs

@@ -5,7 +5,7 @@
 Target for the TEEOS operating system.
 
 TEEOS is a mini os run in TrustZone, for trusted/security apps. The kernel of TEEOS is HongMeng/ChCore micro kernel. The libc for TEEOS is a part of musl.
-It's very small that there is no RwLock, no network, no stdin, and no file system for apps in TEEOS.
+It's very small that there is no network, no stdin, and no file system for apps in TEEOS.
 
 Some abbreviation: