AlkantarClanX12
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� c��f�� � �: � d Z dZddlZddlmZ ddlZddlZddlZddl m Z ddlZddlZddl mZ ddlZddlZddlmZ ej � � Zda G d � d � � Zd� Z ej e� � dZd Z G d� de� � Z G d� d� � Zd� Z G d� de� � Z G d� de� � Z! G d� de� � Z" G d� de � � Z#d� Z$d� Z% d'd�Z&d(d�Z' G d� d ej( � � Z)da*da+d!� Z,d"� Z- G d#� d$ej. � � Z/ G d%� d&ej0 � � Z1dS ))a- Implements ProcessPoolExecutor. The following diagram and text describe the data-flow through the system: |======================= In-process =====================|== Out-of-process ==| +----------+ +----------+ +--------+ +-----------+ +---------+ | | => | Work Ids | | | | Call Q | | Process | | | +----------+ | | +-----------+ | Pool | | | | ... | | | | ... | +---------+ | | | 6 | => | | => | 5, call() | => | | | | | 7 | | | | ... | | | | Process | | ... | | Local | +-----------+ | Process | | Pool | +----------+ | Worker | | #1..n | | Executor | | Thread | | | | | +----------- + | | +-----------+ | | | | <=> | Work Items | <=> | | <= | Result Q | <= | | | | +------------+ | | +-----------+ | | | | | 6: call() | | | | ... | | | | | | future | | | | 4, result | | | | | | ... | | | | 3, except | | | +----------+ +------------+ +--------+ +-----------+ +---------+ Executor.submit() called: - creates a uniquely numbered _WorkItem and adds it to the "Work Items" dict - adds the id of the _WorkItem to the "Work Ids" queue Local worker thread: - reads work ids from the "Work Ids" queue and looks up the corresponding WorkItem from the "Work Items" dict: if the work item has been cancelled then it is simply removed from the dict, otherwise it is repackaged as a _CallItem and put in the "Call Q". New _CallItems are put in the "Call Q" until "Call Q" is full. NOTE: the size of the "Call Q" is kept small because calls placed in the "Call Q" can no longer be cancelled with Future.cancel(). - reads _ResultItems from "Result Q", updates the future stored in the "Work Items" dict and deletes the dict entry Process #1..n: - reads _CallItems from "Call Q", executes the calls, and puts the resulting _ResultItems in "Result Q" z"Brian Quinlan (brian@sweetapp.com)� N)�_base)�Queue)�partial)�format_exceptionFc �&