//usr/lib64/python3.9/multiprocessing
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dummy — dir
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__init__.py — 916 B
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connection.py — 31.11 KB
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context.py — 10.99 KB
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forkserver.py — 11.86 KB
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heap.py — 11.35 KB
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managers.py — 46.19 KB
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pool.py — 31.79 KB
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popen_fork.py — 2.32 KB
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popen_forkserver.py — 2.18 KB
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popen_spawn_posix.py — 1.98 KB
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popen_spawn_win32.py — 3.92 KB
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process.py — 11.72 KB
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queues.py — 11.74 KB
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reduction.py — 9.29 KB
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resource_sharer.py — 5.01 KB
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resource_tracker.py — 8.41 KB
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shared_memory.py — 17.96 KB
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sharedctypes.py — 6.16 KB
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spawn.py — 9.08 KB
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synchronize.py — 11.34 KB
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util.py — 13.68 KB
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multiprocessing
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import io import os from .context import reduction, set_spawning_popen from . import popen_fork from . import spawn from . import util __all__ = ['Popen'] # # Wrapper for an fd used while launching a process # class _DupFd(object): def __init__(self, fd): self.fd = fd def detach(self): return self.fd # # Start child process using a fresh interpreter # class Popen(popen_fork.Popen): method = 'spawn' DupFd = _DupFd def __init__(self, process_obj): self._fds = [] super().__init__(process_obj) def duplicate_for_child(self, fd): self._fds.append(fd) return fd def _launch(self, process_obj): from . import resource_tracker tracker_fd = resource_tracker.getfd() self._fds.append(tracker_fd) prep_data = spawn.get_preparation_data(process_obj._name) fp = io.BytesIO() set_spawning_popen(self) try: reduction.dump(prep_data, fp) reduction.dump(process_obj, fp) finally: set_spawning_popen(None) parent_r = child_w = child_r = parent_w = None try: parent_r, child_w = os.pipe() child_r, parent_w = os.pipe() cmd = spawn.get_command_line(tracker_fd=tracker_fd, pipe_handle=child_r) self._fds.extend([child_r, child_w]) self.pid = util.spawnv_passfds(spawn.get_executable(), cmd, self._fds) self.sentinel = parent_r with open(parent_w, 'wb', closefd=False) as f: f.write(fp.getbuffer()) finally: fds_to_close = [] for fd in (parent_r, parent_w): if fd is not None: fds_to_close.append(fd) self.finalizer = util.Finalize(self, util.close_fds, fds_to_close) for fd in (child_r, child_w): if fd is not None: os.close(fd)