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asyncio: Add support for running subprocesses on Windows with the IOCP event loop (Richard Oudkerk).

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This commit is contained in:
Guido van Rossum 2013-10-30 14:52:03 -07:00
parent 90fb914b4b
commit 5969128a86
7 changed files with 137 additions and 195 deletions
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19
Lib/asyncio/windows_utils.py
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@ -24,6 +24,7 @@ __all__ = ['socketpair', 'pipe', 'Popen', 'PIPE', 'PipeHandle']
BUFSIZE = 8192
PIPE = subprocess.PIPE
STDOUT = subprocess.STDOUT
_mmap_counter = itertools.count()
#
@ -146,24 +147,34 @@ class Popen(subprocess.Popen):
The stdin, stdout, stderr are None or instances of PipeHandle.
"""
def __init__(self, args, stdin=None, stdout=None, stderr=None, **kwds):
assert not kwds.get('universal_newlines')
assert kwds.get('bufsize', 0) == 0
stdin_rfd = stdout_wfd = stderr_wfd = None
stdin_wh = stdout_rh = stderr_rh = None
if stdin == PIPE:
stdin_rh, stdin_wh = pipe(overlapped=(False, True))
stdin_rh, stdin_wh = pipe(overlapped=(False, True), duplex=True)
stdin_rfd = msvcrt.open_osfhandle(stdin_rh, os.O_RDONLY)
else:
stdin_rfd = stdin
if stdout == PIPE:
stdout_rh, stdout_wh = pipe(overlapped=(True, False))
stdout_wfd = msvcrt.open_osfhandle(stdout_wh, 0)
else:
stdout_wfd = stdout
if stderr == PIPE:
stderr_rh, stderr_wh = pipe(overlapped=(True, False))
stderr_wfd = msvcrt.open_osfhandle(stderr_wh, 0)
elif stderr == STDOUT:
stderr_wfd = stdout_wfd
else:
stderr_wfd = stderr
try:
super().__init__(args, bufsize=0, universal_newlines=False,
stdin=stdin_rfd, stdout=stdout_wfd,
super().__init__(args, stdin=stdin_rfd, stdout=stdout_wfd,
stderr=stderr_wfd, **kwds)
except:
for h in (stdin_wh, stdout_rh, stderr_rh):
_winapi.CloseHandle(h)
if h is not None:
_winapi.CloseHandle(h)
raise
else:
if stdin_wh is not None: