diff options
| -rw-r--r-- | pym/portage/util/_dyn_libs/PreservedLibsRegistry.py | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/pym/portage/util/_dyn_libs/PreservedLibsRegistry.py b/pym/portage/util/_dyn_libs/PreservedLibsRegistry.py index f3cbb3390..3fb812048 100644 --- a/pym/portage/util/_dyn_libs/PreservedLibsRegistry.py +++ b/pym/portage/util/_dyn_libs/PreservedLibsRegistry.py @@ -36,11 +36,16 @@ class PreservedLibsRegistry(object): def lock(self): """Grab an exclusive lock on the preserved libs registry.""" + if self._lock is not None: + raise AssertionError("already locked") self._lock = lockfile(self._filename) def unlock(self): """Release our exclusive lock on the preserved libs registry.""" + if self._lock is None: + raise AssertionError("not locked") unlockfile(self._lock) + self._lock = None def load(self): """ Reload the registry data from file """ @@ -65,7 +70,13 @@ class PreservedLibsRegistry(object): self.pruneNonExisting() def store(self): - """ Store the registry data to file """ + """ + Store the registry data to the file. The existing inode will be + replaced atomically, so if that inode is currently being used + for a lock then that lock will be rendered useless. Therefore, + it is important not to call this method until the current lock + is ready to be immediately released. + """ if os.environ.get("SANDBOX_ON") == "1" or \ self._data == self._data_orig: return |