Module locking

source code

Module implementing the Ganeti locking code.

Classes

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SharedLock
Implements a shared lock.

LockSet
Implements a set of locks.

GanetiLockManager
The Ganeti Locking Library

Functions

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ssynchronized(lock, shared=0)
Shared Synchronization decorator.

source code

Variables

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ALL_SET = None

LEVEL_CLUSTER = 0

LEVEL_INSTANCE = 1

LEVEL_NODE = 2

LEVELS = [LEVEL_CLUSTER, LEVEL_INSTANCE, LEVEL_NODE]

LEVELS_MOD = [LEVEL_NODE, LEVEL_INSTANCE]

BGL = 'BGL'

Imports: threading, errors, utils

Function Details

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ssynchronized(lock, shared=0)

source code

Shared Synchronization decorator.

Calls the function holding the given lock, either in exclusive or shared mode. It requires the passed lock to be a SharedLock (or support its semantics).