a DOgPL@sdZddlmZmZddlmZddlmZddlZddl Z ddl Z dZ dZ dd Z ed gd Zd e_e jd krdej_dej_dej_dej_GdddeZGdddedZGdddeZGdddeZGdddeZee drGdddeZee d rGd!d"d"eZee d#r6Gd$d%d%eZee d&rRGd'd(d(eZd)d*Zed&rjeZn4ed rzeZn$ed#reZnedreZneZdS)+z|Selectors module. This module allows high-level and efficient I/O multiplexing, built upon the `select` module primitives. )ABCMetaabstractmethod) namedtuple)MappingNc Csdt|tr|}n:zt|}Wn(tttfyHtd|dYn0|dkr`td||S)zReturn a file descriptor from a file object. Parameters: fileobj -- file object or file descriptor Returns: corresponding file descriptor Raises: ValueError if the object is invalid zInvalid file object: {!r}NrzInvalid file descriptor: {}) isinstanceintfilenoAttributeError TypeError ValueErrorformat)fileobjfdr./opt/alt/python39/lib64/python3.9/selectors.py_fileobj_to_fds r SelectorKey)rreventsdatazSelectorKey(fileobj, fd, events, data) Object used to associate a file object to its backing file descriptor, selected event mask, and attached data. )zFile object registered.zUnderlying file descriptor.z3Events that must be waited for on this file object.zzOptional opaque data associated to this file object. For example, this could be used to store a per-client session ID.c@s0eZdZdZddZddZddZdd Zd S) _SelectorMappingz)Mapping of file objects to selector keys.cCs ||_dSN) _selector)selfselectorrrr__init__@sz_SelectorMapping.__init__cCs t|jjSr)lenr _fd_to_keyrrrr__len__Csz_SelectorMapping.__len__cCsBz|j|}|jj|WSty<td|dYn0dSN{!r} is not registered)r_fileobj_lookupr KeyErrorr)rrrrrr __getitem__Fs   z_SelectorMapping.__getitem__cCs t|jjSr)iterrr r!rrr__iter__Msz_SelectorMapping.__iter__N)__name__ __module__ __qualname____doc__rr"r'r)rrrrr=s rc@sneZdZdZedddZeddZdddZedd d Zd d Z d dZ eddZ ddZ ddZ dS) BaseSelectora-Selector abstract base class. A selector supports registering file objects to be monitored for specific I/O events. A file object is a file descriptor or any object with a `fileno()` method. An arbitrary object can be attached to the file object, which can be used for example to store context information, a callback, etc. A selector can use various implementations (select(), poll(), epoll()...) depending on the platform. The default `Selector` class uses the most efficient implementation on the current platform. NcCstdS)a3Register a file object. Parameters: fileobj -- file object or file descriptor events -- events to monitor (bitwise mask of EVENT_READ|EVENT_WRITE) data -- attached data Returns: SelectorKey instance Raises: ValueError if events is invalid KeyError if fileobj is already registered OSError if fileobj is closed or otherwise is unacceptable to the underlying system call (if a system call is made) Note: OSError may or may not be raised NNotImplementedErrorrrrrrrrregister`szBaseSelector.registercCstdS)ajUnregister a file object. Parameters: fileobj -- file object or file descriptor Returns: SelectorKey instance Raises: KeyError if fileobj is not registered Note: If fileobj is registered but has since been closed this does *not* raise OSError (even if the wrapped syscall does) Nr/)rrrrr unregisterwszBaseSelector.unregistercCs||||||S)ayChange a registered file object monitored events or attached data. Parameters: fileobj -- file object or file descriptor events -- events to monitor (bitwise mask of EVENT_READ|EVENT_WRITE) data -- attached data Returns: SelectorKey instance Raises: Anything that unregister() or register() raises )r3r2r1rrrmodifys zBaseSelector.modifycCstdS)aqPerform the actual selection, until some monitored file objects are ready or a timeout expires. Parameters: timeout -- if timeout > 0, this specifies the maximum wait time, in seconds if timeout <= 0, the select() call won't block, and will report the currently ready file objects if timeout is None, select() will block until a monitored file object becomes ready Returns: list of (key, events) for ready file objects `events` is a bitwise mask of EVENT_READ|EVENT_WRITE Nr/)rtimeoutrrrselectszBaseSelector.selectcCsdS)zmClose the selector. This must be called to make sure that any underlying resource is freed. Nrr!rrrcloseszBaseSelector.closecCsJ|}|durtdz ||WStyDtd|dYn0dS)zzReturn the key associated to a registered file object. Returns: SelectorKey for this file object NzSelector is closedr$)get_map RuntimeErrorr&r)rrmappingrrrget_keys  zBaseSelector.get_keycCstdS)z2Return a mapping of file objects to selector keys.Nr/r!rrrr8szBaseSelector.get_mapcCs|Srrr!rrr __enter__szBaseSelector.__enter__cGs |dSr)r7)rargsrrr__exit__szBaseSelector.__exit__)N)N)N)r*r+r,r-rr2r3r4r6r7r;r8r<r>rrrrr.Qs     r.) metaclassc@sTeZdZdZddZddZdddZd d Zdd d Zd dZ ddZ ddZ dS)_BaseSelectorImplzBase selector implementation.cCsi|_t||_dSr)r r_mapr!rrrrsz_BaseSelectorImpl.__init__cCsLz t|WStyF|jD]}|j|ur"|jYSq"Yn0dS)alReturn a file descriptor from a file object. This wraps _fileobj_to_fd() to do an exhaustive search in case the object is invalid but we still have it in our map. This is used by unregister() so we can unregister an object that was previously registered even if it is closed. It is also used by _SelectorMapping. N)rr r valuesrrrrkeyrrrr%s    z!_BaseSelectorImpl._fileobj_lookupNcCsb|r|ttB@r td|t|||||}|j|jvrRtd||j||j|j<|S)NzInvalid events: {!r}z"{!r} (FD {}) is already registered) EVENT_READ EVENT_WRITEr rrr%rr r&rrrrrDrrrr2s  z_BaseSelectorImpl.registercCs>z|j||}Wn"ty8td|dYn0|Sr#)r popr%r&rrCrrrr3s  z_BaseSelectorImpl.unregistercCsz|j||}Wn"ty6td|dYn0||jkr\||||||}n"||jkr~|j|d}||j|j <|S)Nr$)r) r r%r&rrr3r2r_replacerrGrrrr4s      z_BaseSelectorImpl.modifycCs|jd|_dSr)r clearrAr!rrrr7 s z_BaseSelectorImpl.closecCs|jSr)rAr!rrrr8sz_BaseSelectorImpl.get_mapcCs&z |j|WSty YdS0dS)zReturn the key associated to a given file descriptor. Parameters: fd -- file descriptor Returns: corresponding key, or None if not found N)r r&)rrrrr _key_from_fds   z_BaseSelectorImpl._key_from_fd)N)N) r*r+r,r-rr%r2r3r4r7r8rKrrrrr@s  r@cs`eZdZdZfddZdfdd ZfddZejd krHdd d Z ne j Z dd d Z Z S)SelectSelectorzSelect-based selector.cstt|_t|_dSr)superrset_readers_writersr! __class__rrr&s zSelectSelector.__init__Ncs@t|||}|t@r&|j|j|t@r<|j|j|Sr)rMr2rErOaddrrFrPrGrQrrr2+s zSelectSelector.registercs,t|}|j|j|j|j|Sr)rMr3rOdiscardrrPrCrQrrr33s zSelectSelector.unregisterZwin32cCs$t||||\}}}|||gfSr)r6)rrw_r5xrrr_select:szSelectSelector._selectc Cs|dur dnt|d}g}z||j|jg|\}}}WntyN|YS0t|}t|}||BD]J}d}||vr|tO}||vr|tO}||}|rh| |||j @fqh|SNr) maxrYrOrPInterruptedErrorrNrErFrKappendr) rr5readyrUrVrWrrrDrrrr6@s$    zSelectSelector.select)N)N)N) r*r+r,r-rr2r3sysplatformrYr6 __classcell__rrrQrrL#s    rLcs^eZdZdZdZdZdZfddZd fdd ZfddZ dfd d Z dd d Z Z S)_PollLikeSelectorzsN   ~T3Z  .  M