C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # # We use a background thread for sharing fds on Unix, and for sharing sockets on # Windows. # # A client which wants to pickle a resource registers it with the resource # sharer and gets an identifier in return. The unpickling process will connect # to the resource sharer, sends the identifier and its pid, and then receives # the resource. # import os import signal import socket import sys import threading from . import process from .context import reduction from . import util __all__ = ['stop'] if sys.platform == 'win32': __all__ += ['DupSocket'] class DupSocket(object): '''Picklable wrapper for a socket.''' def __init__(self, sock): new_sock = sock.dup() def send(conn, pid): share = new_sock.share(pid) conn.send_bytes(share) self._id = _resource_sharer.register(send, new_sock.close) def detach(self): '''Get the socket. This should only be called once.''' with _resource_sharer.get_connection(self._id) as conn: share = conn.recv_bytes() return socket.fromshare(share) else: __all__ += ['DupFd'] class DupFd(object): '''Wrapper for fd which can be used at any time.''' def __init__(self, fd): new_fd = os.dup(fd) def send(conn, pid): reduction.send_handle(conn, new_fd, pid) def close(): os.close(new_fd) self._id = _resource_sharer.register(send, close) def detach(self): '''Get the fd. This should only be called once.''' with _resource_sharer.get_connection(self._id) as conn: return reduction.recv_handle(conn) class _ResourceSharer(object): '''Manager for resouces using background thread.''' def __init__(self): self._key = 0 self._cache = {} self._old_locks = [] self._lock = threading.Lock() self._listener = None self._address = None self._thread = None util.register_after_fork(self, _ResourceSharer._afterfork) def register(self, send, close): '''Register resource, returning an identifier.''' with self._lock: if self._address is None: self._start() self._key += 1 self._cache[self._key] = (send, close) return (self._address, self._key) @staticmethod def get_connection(ident): '''Return connection from which to receive identified resource.''' from .connection import Client address, key = ident c = Client(address, authkey=process.current_process().authkey) c.send((key, os.getpid())) return c def stop(self, timeout=None): '''Stop the background thread and clear registered resources.''' from .connection import Client with self._lock: if self._address is not None: c = Client(self._address, authkey=process.current_process().authkey) c.send(None) c.close() self._thread.join(timeout) if self._thread.is_alive(): util.sub_warning('_ResourceSharer thread did ' 'not stop when asked') self._listener.close() self._thread = None self._address = None self._listener = None for key, (send, close) in self._cache.items(