a

�DOg�)�@s|dZd
Z
Gdd�d�ZGdd�de�ZGdd�de�ZGdd	�d	ee�ZGd
d�de�ZGdd
�d
e�ZGdd�de�ZdS)zAbstract Transport class.)�
BaseTransport�
ReadTransport�WriteTransport�	Transport�DatagramTransport�SubprocessTransportc@sHeZ
dZd
ZdZddd�
Zddd�
Zdd	�Zd
d�Zdd
�Z	dd�Z
dS)r
zBase class for transports.�
�_extraNcCs|
duri}
|
|_dS�
Nr)�self�extra�r�*/usr/lib64/python3.9/asyncio/transports.py�__init__s


zBaseTransport.__init__cCs|j�
|
|�S)
z#Get optional transport information.)r�get)r
�name�defaultrrr
�get_extra_infoszBaseTransport.get_extra_infoc


Cst�
d
S)z2Return True if the transport is closing or closed.N�
�NotImplementedError�
r
rrr
�
is_closingszBaseTransport.is_closingc


Cst�
d
S)a
Close the transport.

        Buffered data will be flushed asynchronously.  No more data
        will be received.  After all buffered data is flushed, the
        protocol's connection_lost() method will (eventually) be
        called with None as its argument.
        Nrrrrr
�closeszBaseTransport.closec
Cst�
d
S)zSet a new protocol.Nr)r
�protocolrrr
�set_protocol%szBaseTransport.set_protocolc


Cst�
d
S)zReturn the current protocol.Nrrrrr
�get_protocol)szBaseTransport.get_protocol)
N)
N)�__name__�
__module__�__qualname__�__doc__�	__slots__rrrrrrrrrr
r
	s



r
c@s,eZ
dZd
ZdZdd�Zdd�Zdd�Zd	S)
rz#Interface for read-only transports.rc


Cst�
d
S)z*Return True if the transport is receiving.Nrrrrr
�
is_reading3szReadTransport.is_readingc


Cst�
d
S)z�Pause the receiving end.

        No data will be passed to the protocol's data_received()
        method until resume_reading() is called.
        Nrrrrr
�
pause_reading7szReadTransport.pause_readingc


Cst�
d
S)z�Resume the receiving end.

        Data received will once again be passed to the protocol's
        data_received() method.
        Nrrrrr
�resume_reading?szReadTransport.resume_readingN)rrrrrr r!r"rrrr
r.s

rc@sVeZ
dZd
ZdZddd�
Zdd�Zdd	�Zd
d�Zdd
�Z	dd�Z
dd�Zdd�ZdS)rz$Interface for write-only transports.rNc
Cst�
d
S)a�Set the high- and low-water limits for write flow control.

        These two values control when to call the protocol's
        pause_writing() and resume_writing() methods.  If specified,
        the low-water limit must be less than or equal to the
        high-water limit.  Neither value can be negative.

        The defaults are implementation-specific.  If only the
        high-water limit is given, the low-water limit defaults to an
        implementation-specific value less than or equal to the
        high-water limit.  Setting high to zero forces low to zero as
        well, and causes pause_writing() to be called whenever the
        buffer becomes non-empty.  Setting low to zero causes
        resume_writing() to be called only once the buffer is empty.
        Use of zero for either limit is generally sub-optimal as it
        reduces opportunities for doing I/O and computation
        concurrently.
        Nr�r
�high�lowrrr
�set_write_buffer_limitsMsz&WriteTransport.set_write_buffer_limitsc


Cst�
d
S)z,Return the current size of the write buffer.Nrrrrr
�get_write_buffer_sizebsz$WriteTransport.get_write_buffer_sizec


Cst�
d
S)z�Get the high and low watermarks for write flow control. 
        Return a tuple (low, high) where low and high are 
        positive number of bytes.Nrrrrr
�get_write_buffer_limitsfsz&WriteTransport.get_write_buffer_limitsc
Cst�
d
S)z�Write some data bytes to the transport.

        This does not block; it buffers the data and arranges for it
        to be sent out asynchronously.
        Nr)r
�datarrr
�writelszWriteTransport.writecCsd
�|
�
}|�
|�

dS)z�Write a list (or any iterable) of data bytes to the transport.

        The default implementation concatenates the arguments and
        calls write() on the result.
        �N)�joinr*)r
Zlist_of_datar)rrr
�
writelinests

zWriteTransport.writelinesc


Cst�
d
S)z�Close the write end after flushing buffered data.

        (This is like typing ^D into a UNIX program reading from stdin.)

        Data may still be received.
        Nrrrrr
�	write_eof}szWriteTransport.write_eofc


Cst�
d
S)zAReturn True if this transport supports write_eof(), False if not.Nrrrrr
�
can_write_eof�szWriteTransport.can_write_eofc


Cst�
d
S�z�Close the transport immediately.

        Buffered data will be lost.  No more data will be received.
        The protocol's connection_lost() method will (eventually) be
        called with None as its argument.
        Nrrrrr
�abort�szWriteTransport.abort)NN)
rrrrrr&r'r(r*r-r.r/r1rrrr
rHs

		rc
@seZ
dZd
ZdZdS)raSInterface representing a bidirectional transport.

    There may be several implementations, but typically, the user does
    not implement new transports; rather, the platform provides some
    useful transports that are implemented using the platform's best
    practices.

    The user never instantiates a transport directly; they call a
    utility function, passing it a protocol factory and other
    information necessary to create the transport and protocol.  (E.g.
    EventLoop.create_connection() or EventLoop.create_server().)

    The utility function will asynchronously create a transport and a
    protocol and hook them up by calling the protocol's
    connection_made() method, passing it the transport.

    The implementation here raises NotImplemented for every method
    except writelines(), which calls write() in a loop.
    rN)rrrrrrrrr
r�s
rc@s&eZ
dZd
ZdZddd�
Zdd�ZdS)	rz(Interface for datagram (UDP) transports.rNc
Cst�
d
S)a
Send data to the transport.

        This does not block; it buffers the data and arranges for it
        to be sent out asynchronously.
        addr is target socket address.
        If addr is None use target address pointed on transport creation.
        Nr)r
r)�addrrrr
�sendto�szDatagramTransport.sendtoc


Cst�
d
Sr0rrrrr
r1�szDatagramTransport.abort)
N)rrrrrr3r1rrrr
r�s


rc@s@eZ
dZd
Zdd�Zdd�Zdd�Zdd	�Zd
d�Zdd
�Z	dS)rrc


Cst�
d
S)zGet subprocess id.Nrrrrr
�get_pid�szSubprocessTransport.get_pidc


Cst�
d
S)z�Get subprocess returncode.

        See also
        http://docs.python.org/3/library/subprocess#subprocess.Popen.returncode
        Nrrrrr
�get_returncode�sz"SubprocessTransport.get_returncodec
Cst�
d
S)z&Get transport for pipe with number fd.Nr)r
�fdrrr
�get_pipe_transport�sz&SubprocessTransport.get_pipe_transportc
Cst�
d
S)z�Send signal to subprocess.

        See also:
        docs.python.org/3/library/subprocess#subprocess.Popen.send_signal
        Nr)r
�signalrrr
�send_signal�szSubprocessTransport.send_signalc


Cst�
d
S)aL
Stop the subprocess.

        Alias for close() method.

        On Posix OSs the method sends SIGTERM to the subprocess.
        On Windows the Win32 API function TerminateProcess()
         is called to stop the subprocess.

        See also:
        http://docs.python.org/3/library/subprocess#subprocess.Popen.terminate
        Nrrrrr
�	terminate�szSubprocessTransport.terminatec


Cst�
d
S)z�Kill the subprocess.

        On Posix OSs the function sends SIGKILL to the subprocess.
        On Windows kill() is an alias for terminate().

        See also:
        http://docs.python.org/3/library/subprocess#subprocess.Popen.kill
        Nrrrrr
�kill�s	zSubprocessTransport.killN)
rrrrr4r5r7r9r:r;rrrr
r�srcsZeZ
dZd
ZdZd�f
dd�	Zdd�Zdd	�Zd
d�Zddd
�
Z	ddd�
Z
dd�Z�ZS)�_FlowControlMixinavAll the logic for (write) flow control in a mix-in base class.

    The subclass must implement get_write_buffer_size().  It must call
    _maybe_pause_protocol() whenever the write buffer size increases,
    and _maybe_resume_protocol() whenever it decreases.  It may also
    override set_write_buffer_limits() (e.g. to specify different
    defaults).

    The subclass constructor must call super().__init__(extra).  This
    will call set_write_buffer_limits().

    The user may call set_write_buffer_limits() and
    get_write_buffer_size(), and their protocol's pause_writing() and
    resume_writing() may be called.
    )�_loop�_protocol_paused�_high_water�
_low_waterNcs$t��
|
�

||_d
|_|��
dS)NF)�superrr=r>�_set_write_buffer_limits)r
rZloop�
�	__class__rr
r
s


z_FlowControlMixin.__init__c

Cs�|��}
|
|j
k
rdS|js�d
|_z|j��
WnRttfyH


�Yn<ty�
}
z$|j�	d|||jd��

WYd}~n
d}~00dS)NTzprotocol.pause_writing() failed��message�	exceptionZ	transportr)
r'r?r>�	_protocolZ
pause_writing�
SystemExit�KeyboardInterrupt�
BaseExceptionr=�call_exception_handler)r
�size�excrrr
�_maybe_pause_protocol
s 















�z'_FlowControlMixin._maybe_pause_protocolc

Cs�|jr||�
�|jk
r|d
|_z|j��
WnRttfy@


�Yn<tyz
}

z$|j�	d|
||jd��

WYd}
~
n
d}
~
00dS)NFz protocol.resume_writing() failedrE)
r>r'r@rHZresume_writingrIrJrKr=rL)r
rNrrr
�_maybe_resume_protocol'
s

�









�z(_FlowControlMixin._maybe_resume_protocolc

Cs|j|j
fSr	)r@r?rrrr
r(7
s
z)_FlowControlMixin.get_write_buffer_limitscCsj|
dur|durd
}
nd|}
|dur.|
d}|
|krBdksZn
td|
�d|�d��
�
|
|_
||_dS)Ni
��zhigh (z) must be >= low (z) must be >= 0)�
ValueErrorr?r@r#rrr
rB:
s






�
z*_FlowControlMixin._set_write_buffer_limitscCs|j|
|d
�
|�
�
dS)N)r$r%)rBrOr#rrr
r&J
s

z)_FlowControlMixin.set_write_buffer_limitsc


Cst�
dSr	rrrrr
r'N
s
z'_FlowControlMixin.get_write_buffer_size)NN)NN)NN)
rrrrrrrOrPr(rBr&r'�
__classcell__rrrCr
r<�s


r<N)	r�__all__r
rrrrrr<rrrr
�<module>
s%L6