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Updated descriptions to incorporate additional information from Tim Peters.

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This mostly closes SF bug #128251.
This commit is contained in:
Fred Drake 2001-01-11 22:49:49 +00:00
parent d8aaec04ba
commit ca7e1ee01a
1 changed files with 12 additions and 10 deletions
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22
Doc/lib/libmmap.tex
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@ -20,25 +20,27 @@ different on Unix and on Windows.
\begin{funcdesc}{mmap}{fileno, length\optional{, tagname}}
\strong{(Windows version)} Maps \var{length} bytes from the file
specified by the file handle \var{fileno}, and returns a mmap object.
If \var{length} is \code{0}, the maximum length of the map will be the
current size of the file when \function{mmap()} is called.
If you wish to map an existing Python file object, use its
\method{fileno()} method to obtain the correct value for the
\var{fileno} parameter.
\var{fileno} parameter. The file must be opened for update.
\var{tagname}, if specified, is a string giving a tag name for the mapping.
Windows allows you to have many different mappings against the same
file. If you specify the name of an existing tag, that tag is opened,
otherwise a new tag of this name is created. If this parameter is
None, the mapping is created without a name. Avoiding the use of the
tag parameter will assist in keeping your code portable between Unix
and Windows.
\var{tagname}, if specified and not \code{None}, is a string giving a
tag name for the mapping. Windows allows you to have many different
mappings against the same file. If you specify the name of an
existing tag, that tag is opened, otherwise a new tag of this name is
created. If this parameter is omitted or \code{None}, the mapping is
created without a name. Avoiding the use of the tag parameter will
assist in keeping your code portable between \UNIX{} and Windows.
\end{funcdesc}
\begin{funcdesc}{mmap}{fileno, size\optional{, flags, prot}}
\strong{(Unix version)} Maps \var{length} bytes from the file
\strong{(\UNIX{} version)} Maps \var{length} bytes from the file
specified by the file handle \var{fileno}, and returns a mmap object.
If you wish to map an existing Python file object, use its
\method{fileno()} method to obtain the correct value for the
\var{fileno} parameter.
\var{fileno} parameter. The file must be opened for update.
\var{flags} specifies the nature of the mapping.
\constant{MAP_PRIVATE} creates a private copy-on-write mapping, so