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popen_spawn_win32.py

import os
import msvcrt
import signal
import sys
import _winapi

from .context import reduction, get_spawning_popen, set_spawning_popen
from . import spawn
from . import util

__all__ = ['Popen']

#
#
#

TERMINATE = 0x10000
WINEXE = (sys.platform == 'win32' and getattr(sys, 'frozen', False))
WINSERVICE = sys.executable.lower().endswith("pythonservice.exe")

#
# We define a Popen class similar to the one from subprocess, but
# whose constructor takes a process object as its argument.
#

class Popen(object):
    '''
    Start a subprocess to run the code of a process object
    '''
    method = 'spawn'

def __init__(self, process_obj):
        prep_data = spawn.get_preparation_data(process_obj._name)

# read end of pipe will be "stolen" by the child process
        # -- see spawn_main() in spawn.py.
        rhandle, whandle = _winapi.CreatePipe(None, 0)
        wfd = msvcrt.open_osfhandle(whandle, 0)
        cmd = spawn.get_command_line(parent_pid=os.getpid(),
                                     pipe_handle=rhandle)
        cmd = ' '.join('"%s"' % x for x in cmd)

with open(wfd, 'wb', closefd=True) as to_child:
            # start process
            try:
                hp, ht, pid, tid = _winapi.CreateProcess(
                    spawn.get_executable(), cmd,
                    None, None, False, 0, None, None, None)
                _winapi.CloseHandle(ht)
            except:
                _winapi.CloseHandle(rhandle)
                raise

# set attributes of self
            self.pid = pid
            self.returncode = None
            self._handle = hp
            self.sentinel = int(hp)
            util.Finalize(self, _winapi.CloseHandle, (self.sentinel,))

# send information to child
            set_spawning_popen(self)
            try:
                reduction.dump(prep_data, to_child)
                reduction.dump(process_obj, to_child)
            finally:
                set_spawning_popen(None)

def duplicate_for_child(self, handle):
        assert self is get_spawning_popen()
        return reduction.duplicate(handle, self.sentinel)

def wait(self, timeout=None):
        if self.returncode is None:
            if timeout is None:
                msecs = _winapi.INFINITE
            else:
                msecs = max(0, int(timeout * 1000 + 0.5))

res = _winapi.WaitForSingleObject(int(self._handle), msecs)
            if res == _winapi.WAIT_OBJECT_0:
                code = _winapi.GetExitCodeProcess(self._handle)
                if code == TERMINATE:
                    code = -signal.SIGTERM
                self.returncode = code

return self.returncode

def poll(self):
        return self.wait(timeout=0)

def terminate(self):
        if self.returncode is None:
            try:
                _winapi.TerminateProcess(int(self._handle), TERMINATE)
            except OSError:
                if self.wait(timeout=1.0) is None:
                    raise

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	drwxr-xr-x	2024-07-05 06:18:52
..	dir	-	root/linksafe	drwxr-xr-x	2024-07-05 06:18:52
__pycache__	dir	-	root/linksafe	drwxr-xr-x	2024-07-05 06:18:52
dummy	dir	-	root/linksafe	drwxr-xr-x	2024-07-05 06:18:52
__init__.py	text/x-script.python	923 B	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
connection.py	text/x-script.python	30.17 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
context.py	text/x-script.python	10.66 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
forkserver.py	text/x-script.python	8.49 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
heap.py	text/x-script.python	8.12 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
managers.py	text/x-script.python	37.26 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
pool.py	text/x-script.python	25.45 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
popen_fork.py	text/x-script.python	2.25 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
popen_forkserver.py	text/x-script.python	1.91 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
popen_spawn_posix.py	text/x-script.python	1.86 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
popen_spawn_win32.py	text/x-script.python	2.93 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
process.py	text/x-script.python	9 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:18
queues.py	text/x-script.python	10.51 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
reduction.py	text/x-script.python	9.01 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
resource_sharer.py	text/x-script.python	5.2 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
semaphore_tracker.py	text/x-script.python	5.27 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:18
sharedctypes.py	text/x-script.python	6.1 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
spawn.py	text/plain	8.66 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
synchronize.py	text/x-script.python	11.77 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17
util.py	text/x-script.python	11.61 KB	root/linksafe	-rw-r--r--	2024-04-17 05:32:17