diff -r f1ef512e14ab -r 460e80488cf0 mercurial/lock.py
--- a/mercurial/lock.py	Tue Aug 20 17:46:17 2024 -0400
+++ b/mercurial/lock.py	Tue Aug 20 18:30:47 2024 -0400
@@ -110,7 +110,7 @@
         raiseinterrupt(assertedsigs[0])
 
 
-def trylock(ui, vfs, lockname, timeout, warntimeout, *args, **kwargs):
+def trylock(ui, vfs, lockname, timeout, warntimeout, *args, **kwargs) -> "lock":
     """return an acquired lock or raise an a LockHeld exception
 
     This function is responsible to issue warnings and or debug messages about
@@ -256,7 +256,7 @@
         # wrapper around procutil.getpid() to make testing easier
         return procutil.getpid()
 
-    def lock(self):
+    def lock(self) -> int:
         timeout = self.timeout
         while True:
             try:
@@ -272,7 +272,7 @@
                     errno.ETIMEDOUT, inst.filename, self.desc, inst.locker
                 )
 
-    def _trylock(self):
+    def _trylock(self) -> None:
         if self.held:
             self.held += 1
             return