# HG changeset patch
# User Siddharth Agarwal <sid0@fb.com>
# Date 1443135641 25200
# Node ID de5a52e5eb9e3c6bb9992953a95e8979f96a3ca5
# Parent  6979a136918598254dfb1c39bb268ae186a82751
lock: add a method to reacquire the lock after subprocesses exit

This is part of a series that will allow locks to be inherited by subprocesses
in limited circumstances.

diff --git a/mercurial/lock.py b/mercurial/lock.py
--- a/mercurial/lock.py
+++ b/mercurial/lock.py
@@ -180,6 +180,14 @@
         self._inherited = True
         return lockname
 
+    def reacquire(self):
+        if not self._inherited:
+            raise error.LockInheritanceContractViolation(
+                'reacquire can only be called after prepinherit')
+        if self.acquirefn:
+            self.acquirefn()
+        self._inherited = False
+
     def release(self):
         """release the lock and execute callback function if any