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author | Guido van Rossum <guido@python.org> | 1999-02-08 18:43:13 (GMT) |
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committer | Guido van Rossum <guido@python.org> | 1999-02-08 18:43:13 (GMT) |
commit | ce67f06491a196dca0818268714e767937c10a50 (patch) | |
tree | 48a4465ebe72b164c3ff4eeba49a8324178c1852 /Doc/lib/libqueue.tex | |
parent | 9e1721fa797ea4ecab64977563967fffeae8f5f7 (diff) | |
download | cpython-ce67f06491a196dca0818268714e767937c10a50.zip cpython-ce67f06491a196dca0818268714e767937c10a50.tar.gz cpython-ce67f06491a196dca0818268714e767937c10a50.tar.bz2 |
Update documentation to reflect changes to Queue.py by Tim Peters.
Diffstat (limited to 'Doc/lib/libqueue.tex')
-rw-r--r-- | Doc/lib/libqueue.tex | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/Doc/lib/libqueue.tex b/Doc/lib/libqueue.tex index 667d813..a846036 100644 --- a/Doc/lib/libqueue.tex +++ b/Doc/lib/libqueue.tex @@ -25,10 +25,15 @@ zero, the queue size is infinite. \end{classdesc} \begin{excdesc}{Empty} -Exception raised when non-blocking get (e.g. \method{get_nowait()}) is -called on a \class{Queue} object which is empty, or for which the -emptyiness cannot be determined (i.e. because the appropriate locks -cannot be acquired). +Exception raised when non-blocking \method{get()} (or +\method{get_nowait()}) is called on a \class{Queue} object which is +empty or locked. +\end{excdesc} + +\begin{excdesc}{Full} +Exception raised when non-blocking \method{put()} (or +\method{get_nowait()}) is called on a \class{Queue} object which is +full or locked. \end{excdesc} \subsection{Queue Objects} @@ -41,31 +46,40 @@ is not described here. See the source code for details. The public methods are: \begin{methoddesc}{qsize}{} -Returns the approximate size of the queue. Because of multithreading +Return the approximate size of the queue. Because of multithreading semantics, this number is not reliable. \end{methoddesc} \begin{methoddesc}{empty}{} -Returns \code{1} if the queue is empty, \code{0} otherwise. Because +Return \code{1} if the queue is empty, \code{0} otherwise. Because of multithreading semantics, this is not reliable. \end{methoddesc} \begin{methoddesc}{full}{} -Returns \code{1} if the queue is full, \code{0} otherwise. Because of +Return \code{1} if the queue is full, \code{0} otherwise. Because of multithreading semantics, this is not reliable. \end{methoddesc} -\begin{methoddesc}{put}{item} -Puts \var{item} into the queue. +\begin{methoddesc}{put}{item\optional{, block}} +Put \var{item} into the queue. If optional argument \var{block} is 1 +(the default), block if necessary until a free slot is available. +Otherwise (\var{block} is 0), put \var{item} on the queue if a free +slot is immediately available, else raise the \exception{Full} +exception. +\end{methoddesc} + +\begin{methoddesc}{put_nowait}{item} +Equivalent to \code{put(\var{item}, 0)}. \end{methoddesc} -\begin{methoddesc}{get}{} -Gets and returns an item from the queue, blocking if necessary until -one is available. +\begin{methoddesc}{get}{\optional{block}} +Remove and return an item from the queue. If optional argument +\var{block} is 1 (the default), block if necessary until an item is +available. Otherwise (\var{block} is 0), return an item if one is +immediately available, else raise the +\exception{Empty} exception. \end{methoddesc} \begin{methoddesc}{get_nowait}{} -Gets and returns an item from the queue if one is immediately -available. Raises an \exception{Empty} exception if the queue is -empty or if the queue's emptiness cannot be determined. +Equivalent to \code{get(0)}. \end{methoddesc} |