1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
\section{\module{statcache} ---
An optimization of \function{os.stat()}}
\declaremodule{standard}{statcache}
\sectionauthor{Moshe Zadka}{moshez@zadka.site.co.il}
\modulesynopsis{Stat files, and remember results.}
\deprecated{2.2}{Use \function{\refmodule{os}.stat()} directly instead
of using the cache; the cache introduces a very high level of
fragility in applications using it and complicates application code
with the addition of cache management support.}
The \module{statcache} module provides a simple optimization to
\function{os.stat()}: remembering the values of previous invocations.
The \module{statcache} module defines the following functions:
\begin{funcdesc}{stat}{path}
This is the main module entry-point.
Identical for \function{os.stat()}, except for remembering the result
for future invocations of the function.
\end{funcdesc}
The rest of the functions are used to clear the cache, or parts of
it.
\begin{funcdesc}{reset}{}
Clear the cache: forget all results of previous \function{stat()}
calls.
\end{funcdesc}
\begin{funcdesc}{forget}{path}
Forget the result of \code{stat(\var{path})}, if any.
\end{funcdesc}
\begin{funcdesc}{forget_prefix}{prefix}
Forget all results of \code{stat(\var{path})} for \var{path} starting
with \var{prefix}.
\end{funcdesc}
\begin{funcdesc}{forget_dir}{prefix}
Forget all results of \code{stat(\var{path})} for \var{path} a file in
the directory \var{prefix}, including \code{stat(\var{prefix})}.
\end{funcdesc}
\begin{funcdesc}{forget_except_prefix}{prefix}
Similar to \function{forget_prefix()}, but for all \var{path} values
\emph{not} starting with \var{prefix}.
\end{funcdesc}
Example:
\begin{verbatim}
>>> import os, statcache
>>> statcache.stat('.')
(16893, 2049, 772, 18, 1000, 1000, 2048, 929609777, 929609777, 929609777)
>>> os.stat('.')
(16893, 2049, 772, 18, 1000, 1000, 2048, 929609777, 929609777, 929609777)
\end{verbatim}
|
