View file File name : asyncore.cpython-38.pyc Content :U �;rc~N � @ sh d Z ddlZddlZddlZddlZddlZddlZddlmZm Z m Z m Z m Z m Z mZmZmZmZmZmZmZ ee e eeeeh�Zze W n ek r� i ZY nX dd� ZG dd� de�Zee e fZ dd � Z d d � Z d d � Z!dd� Z"d&dd�Z#d'dd�Z$e$Z%d(dd�Z&G dd� d�Z'G dd � d e'�Z(d d � Z)d)d d �Z*ej+d!k�rdG d"d#� d#�Z,G d$d%� d%e'�Z-dS )*a� Basic infrastructure for asynchronous socket service clients and servers. There are only two ways to have a program on a single processor do "more than one thing at a time". Multi-threaded programming is the simplest and most popular way to do it, but there is another very different technique, that lets you have nearly all the advantages of multi-threading, without actually using multiple threads. it's really only practical if your program is largely I/O bound. If your program is CPU bound, then pre-emptive scheduled threads are probably what you really need. Network servers are rarely CPU-bound, however. If your operating system supports the select() system call in its I/O library (and nearly all do), then you can use it to juggle multiple communication channels at once; doing other work while your I/O is taking place in the "background." Although this strategy can seem strange and complex, especially at first, it is in many ways easier to understand and control than multi-threaded programming. The module documented here solves many of the difficult problems for you, making the task of building sophisticated high-performance network servers and clients a snap. � N) �EALREADY� EINPROGRESS� EWOULDBLOCK� ECONNRESET�EINVAL�ENOTCONN� ESHUTDOWN�EISCONN�EBADF� ECONNABORTED�EPIPE�EAGAIN� errorcodec C sH z t �| �W S tttfk rB | tkr6t| Y S d| Y S X d S )NzUnknown error %s)�os�strerror� ValueError� OverflowError� NameErrorr )�err� r � /usr/lib/python3.8/asyncore.py� _strerrorD s r c @ s e Zd ZdS )�ExitNowN)�__name__� __module__� __qualname__r r r r r L s r c C s: z | � � W n( tk r" � Y n | �� Y nX d S �N)�handle_read_event�_reraised_exceptions� handle_error��objr r r �readQ s r" c C s: z | � � W n( tk r" � Y n | �� Y nX d S r )�handle_write_eventr r r r r r �writeY s r$ c C s: z | � � W n( tk r" � Y n | �� Y nX d S r )�handle_expt_eventr r r r r r � _exceptiona s r& c C s� zX|t j@ r| �� |t j@ r&| �� |t j@ r8| �� |t jt jB t j B @ rV| � � W nh t k r� } z$|j d t kr�| �� n| � � W 5 d }~X Y n( tk r� � Y n | �� Y nX d S �Nr )�select�POLLINr �POLLOUTr# �POLLPRIr% ZPOLLHUPZPOLLERRZPOLLNVAL� handle_close�OSError�args� _DISCONNECTEDr r )r! �flags�er r r � readwritei s" r2 � c C s< |d kr t }|�r8g }g }g }t|�� �D ]L\}}|�� }|�� }|rP|�|� |rd|jsd|�|� |sl|r*|�|� q*g | kr�| kr�|kr�n nt�| � d S t � |||| �\}}}|D ] }|� |�}|d kr�q�t |� q�|D ]"}|� |�}|d k�rq�t |� q�|D ]&}|� |�}|d k�r,�qt |� �qd S r )� socket_map�list�items�readable�writable�append� accepting�time�sleepr( �getr" r$ r& ) �timeout�map�r�wr1 �fdr! 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Z ignore_allr� r r r � close_all) s r� �posixc @ sN e Zd Zdd� Zdd� Zdd� Zdd� Zdd d �ZeZeZ d d � Z dd� Z d S )� file_wrapperc C s t �|�| _d S r )r �duprB �rW rB r r r rY N s zfile_wrapper.__init__c C s* | j dkr tjd| t| d� | �� d S )Nr zunclosed file %r)�source)rB �warnings�warn�ResourceWarningr{ ri r r r �__del__Q s �zfile_wrapper.__del__c G s t j| jf|�� S r )r r" rB �rW r. r r r rz W s zfile_wrapper.recvc G s t j| jf|�� S r )r r$ rB r� r r r rv Z s zfile_wrapper.sendNc C s( |t jkr |t jkr |s dS td��d S )Nr z-Only asyncore specific behaviour implemented.)rV rg r� �NotImplementedError)rW �levelZoptnameZbuflenr r r rh ] s ��zfile_wrapper.getsockoptc C s( | j dk rd S | j }d| _ t�|� d S )Nr r� )rB r r{ r� r r r r{ h s zfile_wrapper.closec C s | j S r )rB ri r r r re o s zfile_wrapper.fileno)N) r r r rY r� rz rv rh r" r$ r{ re r r r r r� I s r� c @ s e Zd Zddd�Zdd� ZdS )�file_dispatcherNc C sP t �| d |� d| _z |�� }W n tk r4 Y nX | �|� t�|d� d S )NTF)rL rY rS re �AttributeError�set_filer � set_blocking)rW rB r? r r r rY t s zfile_dispatcher.__init__c C s" t |�| _| j�� | _| �� d S r )r� rV re rP rb r� r r r r� s zfile_dispatcher.set_file)N)r r r rY r� r r r r r� r s r� )r3 N)r3 N)rG FNN)NF).�__doc__r( rV r| r; r� r �errnor r r r r r r r r r r r r r� r/ r4 r r � Exceptionr �KeyboardInterrupt� SystemExitr r" r$ r& r2 rC rF Zpoll3rK rL r� r� r� rn r� r� r r r r �<module> sD < � ' * )