o
    ˜»áfn/  ã                   @   sú   d dl Z d dlZd dlZd dlZd dlZd dlZd dlZd dlZd dlZddl	m
Z
 ddl	mZ ddlmZ ddl	mZ ddl	mZ ddl	mZ g d	¢Zd
Ze d¡ZG dd„ deƒZddd„Zdd„ Zdd„ Zdd„ Zeƒ ZejZejZejZejZdS )é    Né   )Ú
connection)Úprocess)Ú	reduction)Úresource_tracker)Úspawn)Úutil)Úensure_runningÚget_inherited_fdsÚconnect_to_new_processÚset_forkserver_preloadé   Úqc                   @   sD   e Zd Zdd„ Zdd„ Zdd„ Zdd„ Zd	d
„ Zdd„ Zdd„ Z	dS )Ú
ForkServerc                 C   s.   d | _ d | _d | _d | _t ¡ | _dg| _d S )NÚ__main__)Ú_forkserver_addressÚ_forkserver_alive_fdÚ_forkserver_pidÚ_inherited_fdsÚ	threadingÚLockÚ_lockÚ_preload_modules©Úself© r   ú1/usr/lib/python3.10/multiprocessing/forkserver.pyÚ__init__"   s   
zForkServer.__init__c                 C   s4   | j  |  ¡  W d   ƒ d S 1 sw   Y  d S ©N)r   Ú_stop_unlockedr   r   r   r   Ú_stop*   s   
"ÿzForkServer._stopc                 C   sV   | j d u rd S t | j¡ d | _t | j d¡ d | _ t | j¡s&t | j¡ d | _d S )Nr   )	r   ÚosÚcloser   Úwaitpidr   Úis_abstract_socket_namespacer   Úunlinkr   r   r   r   r   /   s   

zForkServer._stop_unlockedc                 C   s&   t dd„ | jD ƒƒstdƒ‚|| _dS )z>Set list of module names to try to load in forkserver process.c                 s   s    | ]	}t |ƒtu V  qd S r   )ÚtypeÚstr)Ú.0Úmodr   r   r   Ú	<genexpr>@   s   € z4ForkServer.set_forkserver_preload.<locals>.<genexpr>z&module_names must be a list of stringsN)Úallr   Ú	TypeError)r   Úmodules_namesr   r   r   r   >   s   
z!ForkServer.set_forkserver_preloadc                 C   s   | j S )z”Return list of fds inherited from parent process.

        This returns None if the current process was not started by fork
        server.
        )r   r   r   r   r   r
   D   s   zForkServer.get_inherited_fdsc              
   C   sð   |   ¡  t|ƒd tkrtdƒ‚t tj¡X}| | j¡ t 	¡ \}}t 	¡ \}}||| j
t ¡ g}||7 }z,zt ||¡ ||fW W t |¡ t |¡ W  d  ƒ S    t |¡ t |¡ ‚ t |¡ t |¡ w 1 sqw   Y  dS )a;  Request forkserver to create a child process.

        Returns a pair of fds (status_r, data_w).  The calling process can read
        the child process's pid and (eventually) its returncode from status_r.
        The calling process should write to data_w the pickled preparation and
        process data.
        é   ztoo many fdsN)r	   ÚlenÚMAXFDS_TO_SENDÚ
ValueErrorÚsocketÚAF_UNIXÚconnectr   r!   Úpiper   r   Úgetfdr   Úsendfdsr"   )r   ÚfdsÚclientÚparent_rÚchild_wÚchild_rÚparent_wÚallfdsr   r   r   r   L   s0   ÿ


ð



ðz!ForkServer.connect_to_new_processc                    sÐ  | j Û t ¡  | jdur1t | jtj¡\}}|s"	 W d  ƒ dS t | j¡ d| _	d| _d| _d}| j
rKddh‰ t d¡}‡ fdd„| ¡ D ƒ}ni }t tj¡s}t d¡}| |¡ t |¡sit |d	¡ | ¡  t ¡ \}}z<z+| ¡ |g}	|| ¡ || j
|f; }t ¡ }
|
gt ¡  }|d
|g7 }t |
||	¡}W n	   t |¡ ‚ W t |¡ nt |¡ w || _	|| _|| _W d  ƒ n1 sÉw   Y  W d  ƒ dS W d  ƒ dS 1 sáw   Y  dS )zíMake sure that a fork server is running.

        This can be called from any process.  Note that usually a child
        process will just reuse the forkserver started by its parent, so
        ensure_running() will do nothing.
        NzCfrom multiprocessing.forkserver import main; main(%d, %d, %r, **%r)Ú	main_pathÚsys_pathÚignorec                    s   i | ]\}}|ˆ v r||“qS r   r   )r(   ÚxÚy©Údesired_keysr   r   Ú
<dictcomp>„   s    z-ForkServer.ensure_running.<locals>.<dictcomp>r3   i€  z-c)r   r   r	   r   r!   r#   ÚWNOHANGr"   r   r   r   r   Úget_preparation_dataÚitemsr2   r3   r   Úarbitrary_addressÚbindr   r$   ÚchmodÚlistenr5   ÚfilenoÚget_executableÚ_args_from_interpreter_flagsÚspawnv_passfds)r   ÚpidÚstatusÚcmdÚdataÚlistenerÚaddressÚalive_rÚalive_wÚfds_to_passÚexeÚargsr   rD   r   r	   i   sZ   
ù	



ÿ
ýçè"èzForkServer.ensure_runningN)
Ú__name__Ú
__module__Ú__qualname__r   r    r   r   r
   r   r	   r   r   r   r   r       s    r   c                 C   sè  |r4d|v r |dur dt  ¡ _zt |¡ W t  ¡ `nt  ¡ `w |D ]}zt|ƒ W q" ty3   Y q"w t ¡  t	 
¡ \}}t	 |d¡ t	 |d¡ dd„ }tj|tjtji}	dd„ |	 ¡ D ƒ}
t |¡ i }tjtj| d	y}t ¡ b}| ¡ t_| |tj¡ | |tj¡ | |tj¡ 	 z(	 d
d„ | ¡ D ƒ}|r¡nq•||v r´t	 |d¡dks²J dƒ‚t‚||v r	t	 |d¡ 	 zt	 dt	j¡\}}W n	 t yÔ   Y n5w |dkrÚn/| !|d¡}|durt	 "|¡}zt#||ƒ W n	 t$yú   Y nw t	 %|¡ nt& 'd| ¡ qÀ||v rº| (¡ d }t) *|t+d ¡}t,|ƒt+kr-t-d .t,|ƒ¡ƒ‚|^}}}| %¡  t	 /¡ }|dkr„d}z<z| %¡  | %¡  ||||g}| 0| 1¡ ¡ t2||||
ƒ}W n t3yv   t4j5t4 6¡ Ž  t4j7 8¡  Y nw W t	 9|¡ n,t	 9|¡ w zt#||ƒ W n
 t$y•   Y nw |||< t	 %|¡ |D ]}t	 %|¡ q¡W d  ƒ n	1 sµw   Y  W n t:yÖ } z|j;t;j<krÌ‚ W Y d}~nd}~ww q’1 sÜw   Y  W d  ƒ dS 1 síw   Y  dS )zRun forkserver.r   NTFc                  W   s   d S r   r   )Ú_unusedr   r   r   Úsigchld_handler¼   s   zmain.<locals>.sigchld_handlerc                 S   s   i | ]\}}|t   ||¡“qS r   )Úsignal)r(   ÚsigÚvalr   r   r   rF   Æ   s    ÿzmain.<locals>.<dictcomp>)rN   c                 S   s   g | ]\}}|j ‘qS r   )Úfileobj)r(   ÚkeyÚeventsr   r   r   Ú
<listcomp>Ú   s    zmain.<locals>.<listcomp>r   ó    zNot at EOF?i   éÿÿÿÿr   z.forkserver: waitpid returned unexpected pid %dzToo many ({0:n}) fds to send)=r   Úcurrent_processÚ_inheritingr   Úimport_main_pathÚ
__import__ÚImportErrorr   Ú_close_stdinr!   r5   Úset_blockingrb   ÚSIGCHLDÚSIGINTÚSIG_IGNrI   Úset_wakeup_fdr2   r3   Ú	selectorsÚDefaultSelectorÚgetsocknameÚ_forkserverr   ÚregisterÚ
EVENT_READÚselectÚreadÚ
SystemExitr#   rG   ÚChildProcessErrorÚpopÚwaitstatus_to_exitcodeÚwrite_signedÚBrokenPipeErrorr"   ÚwarningsÚwarnÚacceptr   Úrecvfdsr0   r/   ÚRuntimeErrorÚformatÚforkÚextendÚvaluesÚ
_serve_oneÚ	ExceptionÚsysÚ
excepthookÚexc_infoÚstderrÚflushÚ_exitÚOSErrorÚerrnoÚECONNABORTED)Úlistener_fdrX   Úpreloadr?   r@   ÚmodnameÚsig_rÚsig_wra   ÚhandlersÚold_handlersÚ	pid_to_fdrV   ÚselectorÚrfdsrR   Ústsr;   Ú
returncodeÚsr8   r<   ÚcodeÚ
unused_fdsÚfdÚer   r   r   Úmain§   sæ   
ÿüÿ
ÿ
ý
ÿ

þÿë
ÿÿ

þþ€þ
€Ü€&ÿ€ÿ±8ør©   c           	      C   sh   t  d¡ | ¡ D ]
\}}t   ||¡ q	|D ]}t |¡ q|^t_tj_	t_
t | ¡}t | |¡}|S )Nrj   )rb   ru   rI   r!   r"   ry   r   r   Ú_resource_trackerÚ_fdr   Údupr   Ú_main)	r<   r8   r¦   r   rc   rd   r§   Úparent_sentinelr¥   r   r   r   r   +  s   
þ
r   c                 C   sX   d}t j}t|ƒ|k r%t | |t|ƒ ¡}|stdƒ‚||7 }t|ƒ|k st  |¡d S )Nri   zunexpected EOFr   )ÚSIGNED_STRUCTÚsizer/   r!   r}   ÚEOFErrorÚunpack)r§   rU   Úlengthr¤   r   r   r   Úread_signedB  s   ür´   c                 C   sB   t  |¡}|rt | |¡}|dkrtdƒ‚||d … }|sd S d S )Nr   zshould not get here)r¯   Úpackr!   Úwriterˆ   )r§   ÚnÚmsgÚnbytesr   r   r   r‚   L  s   
ür‚   )NN) r–   r!   rv   rb   r2   Ústructr   r   r„   Ú r   r   Úcontextr   r   r   r   Ú__all__r0   ÚStructr¯   Úobjectr   r©   r   r´   r‚   ry   r	   r
   r   r   r   r   r   r   Ú<module>   s<    
 
 

