Package instant :: Module locking

Module locking

File locking for the cache system, to avoid problems
when multiple processes work with the same module.
Only works on UNIX systems.

Two python libraries can be used:

  flufl.lock : A nfs safe which can be downloaded from:

                 https://launchpad.net/flufl.lock

  fcntl      : A builtin Python module which only works on posix machines
               and it is does unfortunately not work on nfs

Functions

[hide private]

get_lock(cache_dir, module_name)
Get a new file lock.

source code

release_lock(lock)
Release a lock currently held by Instant.

source code

release_all_locks()
Release all locks currently held by Instant.

source code

Variables

[hide private]

flufl = None

_lock_names = {}

_lock_files = {}

_lock_count = {}

__package__ = 'instant'