AlkantarClanX12
Current Path : /opt/alt/python310/lib64/python3.10/multiprocessing/__pycache__/ |
Current File : //opt/alt/python310/lib64/python3.10/multiprocessing/__pycache__/shared_memory.cpython-310.pyc |
o 6��fH � @ s� d Z ddgZddlmZ ddlZddlZddlZddlZddlZddl Z ej dkr0ddlZdZnddl Z dZd d lmZ ejejB ZdZerIdZnd Zdd� ZG dd� d�ZdZG dd� d�ZdS )z�Provides shared memory for direct access across processes. The API of this package is currently provisional. Refer to the documentation for details. �SharedMemory� ShareableList� )�partialN�ntFT� )�resource_tracker� z/psm_Zwnsm_c C sB t tt� d } | dksJ d��tt�| � }t|�t ksJ �|S )z6Create a random filename for the shared memory object.� z_SHM_NAME_PREFIX too long)�_SHM_SAFE_NAME_LENGTH�len�_SHM_NAME_PREFIX�secretsZ token_hex)�nbytes�name� r �D/opt/alt/python310/lib64/python3.10/multiprocessing/shared_memory.py�_make_filename( s r c @ s� e Zd ZdZdZdZdZdZej Z dZerdndZ ddd �Zd d� Zdd � Zdd� Zedd� �Zedd� �Zedd� �Zdd� Zdd� ZdS )r a� Creates a new shared memory block or attaches to an existing shared memory block. Every shared memory block is assigned a unique name. This enables one process to create a shared memory block with a particular name so that a different process can attach to that same shared memory block using that same name. As a resource for sharing data across processes, shared memory blocks may outlive the original process that created them. When one process no longer needs access to a shared memory block that might still be needed by other processes, the close() method should be called. When a shared memory block is no longer needed by any process, the unlink() method should be called to ensure proper cleanup.N���i� TFr c C sx |dkst d��|rttjB | _|dkrt d��|d u r&| jtj@ s&t d��tr�|d u rL t� }z tj || j| j d�| _W n tyF Y q,w || _ n| jrSd| n|}tj || j| j d�| _|| _ z|ro|rot�| j|� t�| j�}|j}t�| j|�| _W n ty� | �� � w t�| j d� n�|r� |d u r�t� n|}t�tjtjtj|d ? d @ |d @ |�}z1t�� }|tjkr�|d ur�ttj t�!tj �|tj��W t�"|� q�tjd||d�| _W t�"|� nt�"|� w || _ n?|| _ t�#tj$d |�}zt�%|tj$ddd�}W t�"|� nt�"|� w zt�&|�}W t�'|� nt�'|� w tjd||d�| _|| _(t)| j�| _*d S )Nr z!'size' must be a positive integerz4'size' must be a positive number different from zeroz&'name' can only be None if create=TrueT)�mode�/� shared_memory� l �� r )ZtagnameF)+� ValueError�_O_CREX�os�O_RDWR�_flags�O_EXCL� _USE_POSIXr �_posixshmemZshm_open�_mode�_fd�FileExistsError�_name�_prepend_leading_slash� ftruncate�fstat�st_size�mmap�_mmap�OSError�unlinkr �register�_winapiZCreateFileMappingZINVALID_HANDLE_VALUEZNULLZPAGE_READWRITEZGetLastErrorZERROR_ALREADY_EXISTS�errnoZEEXIST�strerrorZCloseHandleZOpenFileMappingZ FILE_MAP_READZ MapViewOfFileZVirtualQuerySizeZUnmapViewOfFile�_size� memoryview�_buf) �selfr �create�sizeZstatsZ temp_nameZh_mapZlast_error_codeZp_bufr r r �__init__K s� ���� � ����zSharedMemory.__init__c C s$ z| � � W d S ty Y d S w �N)�closer* �r3 r r r �__del__� s �zSharedMemory.__del__c C s | j | jd| jffS )NF)� __class__r r5 r9 r r r � __reduce__� s ��zSharedMemory.__reduce__c C s | j j� d| j�d| j� d�S )N�(z, size=�))r; �__name__r r5 r9 r r r �__repr__� s zSharedMemory.__repr__c C � | j S )z4A memoryview of contents of the shared memory block.)r2 r9 r r r �buf� � zSharedMemory.bufc C s. | j }tr| jr| j �d�r| j dd� }|S )z4Unique name that identifies the shared memory block.r r N)r# r r$ � startswith)r3 Z reported_namer r r r � s zSharedMemory.namec C rA )zSize in bytes.)r0 r9 r r r r5 � rC zSharedMemory.sizec C s` | j dur | j �� d| _ | jdur| j�� d| _tr,| jdkr.t�| j� d| _dS dS dS )zkCloses access to the shared memory from this instance but does not destroy the shared memory block.Nr r )r2 �releaser) r8 r r! r r9 r r r r8 � s �zSharedMemory.closec C s0 t r| jrt�| j� t�| jd� dS dS dS )z�Requests that the underlying shared memory block be destroyed. In order to ensure proper cleanup of resources, unlink should be called once (and only once) across all processes which have access to the shared memory block.r N)r r# r Z shm_unlinkr � unregisterr9 r r r r+ � s �zSharedMemory.unlink)NFr )r? � __module__�__qualname__�__doc__r# r! r) r2 r r r r r r$ r6 r: r<