Module b.lock

Locking using OS file locks or file existence.

Note: This method of locking is generally deprecated in favour of LockDir, but is used to lock local WorkingTrees, and by some old formats. It's accessed through Transport.lock_read(), etc.

This module causes two methods, lock() and unlock() to be defined in any way that works on the current platform.

It is not specified whether these locks are reentrant (i.e. can be taken repeatedly by a single process) or whether they exclude different threads in a single process. That reentrancy is provided by LockableFiles.

This defines two classes: ReadLock and WriteLock, which can be implemented in different ways on different platforms. Both have an unlock() method.

Line #	Kind	Name	Docs
48	Class	LockHooks	Undocumented
62	Class	Lock	Base class for locks.
71	Class	LockResult	Result of an operation on a lock; passed to a hook
416	Class	OVERLAPPED	Undocumented
106	Class	_OSLock	No class docstring; 1/5 methods documented
154	Class	_fcntl_FileLock	Undocumented
161	Class	_fcntl_WriteLock	Undocumented
195	Class	_fcntl_ReadLock	No class docstring; 1/3 methods documented
243	Class	_fcntl_TemporaryWriteLock	A token used when grabbing a temporary_write_lock.
307	Class	_w32c_FileLock	Undocumented
336	Class	_w32c_ReadLock	No class docstring; 1/2 methods documented
361	Class	_w32c_WriteLock	No class docstring; 1/2 methods documented
406	Class	_inner_struct	Undocumented
411	Class	_inner_union	Undocumented
423	Class	_ctypes_FileLock	Undocumented
461	Class	_ctypes_ReadLock	No class docstring; 1/2 methods documented
485	Class	_ctypes_WriteLock	No class docstring; 1/2 methods documented