Mirror
/
cpython
mirror of https://github.com/python/cpython
4
1
Fork 0
Code Issues Releases Wiki Activity

bpo-31884 subprocess: add Windows constants for process priority (#4150)

This commit is contained in:
James 2017-11-08 14:18:59 +00:00 committed by Victor Stinner
parent 54cc0c0789
commit b5d9e08114
4 changed files with 119 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

98
Doc/library/subprocess.rst
View File

@ -516,8 +516,20 @@ functions.
If given, *startupinfo* will be a :class:`STARTUPINFO` object, which is
passed to the underlying ``CreateProcess`` function.
*creationflags*, if given, can be :data:`CREATE_NEW_CONSOLE` or
:data:`CREATE_NEW_PROCESS_GROUP`. (Windows only)
*creationflags*, if given, can be one or more of the following flags:
* :data:`CREATE_NEW_CONSOLE`
* :data:`CREATE_NEW_PROCESS_GROUP`
* :data:`ABOVE_NORMAL_PRIORITY_CLASS`
* :data:`BELOW_NORMAL_PRIORITY_CLASS`
* :data:`HIGH_PRIORITY_CLASS`
* :data:`IDLE_PRIORITY_CLASS`
* :data:`NORMAL_PRIORITY_CLASS`
* :data:`REALTIME_PRIORITY_CLASS`
* :data:`CREATE_NO_WINDOW`
* :data:`DETACHED_PROCESS`
* :data:`CREATE_DEFAULT_ERROR_MODE`
* :data:`CREATE_BREAKAWAY_FROM_JOB`
Popen objects are supported as context managers via the :keyword:`with` statement:
on exit, standard file descriptors are closed, and the process is waited for.
@ -803,8 +815,8 @@ on Windows.
:class:`Popen` is called with ``shell=True``.
Constants
^^^^^^^^^
Windows Constants
^^^^^^^^^^^^^^^^^
The :mod:`subprocess` module exposes the following constants.
@ -851,6 +863,84 @@ The :mod:`subprocess` module exposes the following constants.
This flag is ignored if :data:`CREATE_NEW_CONSOLE` is specified.
.. data:: ABOVE_NORMAL_PRIORITY_CLASS
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will have an above average priority.
.. versionadded:: 3.7
.. data:: BELOW_NORMAL_PRIORITY_CLASS
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will have a below average priority.
.. versionadded:: 3.7
.. data:: HIGH_PRIORITY_CLASS
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will have a high priority.
.. versionadded:: 3.7
.. data:: IDLE_PRIORITY_CLASS
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will have an idle (lowest) priority.
.. versionadded:: 3.7
.. data:: NORMAL_PRIORITY_CLASS
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will have an normal priority. (default)
.. versionadded:: 3.7
.. data:: REALTIME_PRIORITY_CLASS
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will have realtime priority.
You should almost never use REALTIME_PRIORITY_CLASS, because this interrupts
system threads that manage mouse input, keyboard input, and background disk
flushing. This class can be appropriate for applications that "talk" directly
to hardware or that perform brief tasks that should have limited interruptions.
.. versionadded:: 3.7
.. data:: CREATE_NO_WINDOW
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will not create a window
.. versionadded:: 3.7
.. data:: DETACHED_PROCESS
A :class:`Popen` ``creationflags`` parameter to specify that a new process
will not inherit its parent's console.
This value cannot be used with CREATE_NEW_CONSOLE.
.. versionadded:: 3.7
.. data:: CREATE_DEFAULT_ERROR_MODE
A :class:`Popen` ``creationflags`` parameter to specify that a new process
does not inherit the error mode of the calling process. Instead, the new
process gets the default error mode.
This feature is particularly useful for multithreaded shell applications
that run with hard errors disabled.
.. versionadded:: 3.7
.. data:: CREATE_BREAKAWAY_FROM_JOB
A :class:`Popen` ``creationflags`` parameter to specify that a new process
is not associated with the job.
.. versionadded:: 3.7
.. _call-function-trio:
Older high-level API

14
Lib/subprocess.py
View File

@ -164,13 +164,23 @@ if _mswindows:
from _winapi import (CREATE_NEW_CONSOLE, CREATE_NEW_PROCESS_GROUP,
STD_INPUT_HANDLE, STD_OUTPUT_HANDLE,
STD_ERROR_HANDLE, SW_HIDE,
STARTF_USESTDHANDLES, STARTF_USESHOWWINDOW)
STARTF_USESTDHANDLES, STARTF_USESHOWWINDOW,
ABOVE_NORMAL_PRIORITY_CLASS, BELOW_NORMAL_PRIORITY_CLASS,
HIGH_PRIORITY_CLASS, IDLE_PRIORITY_CLASS,
NORMAL_PRIORITY_CLASS, REALTIME_PRIORITY_CLASS,
CREATE_NO_WINDOW, DETACHED_PROCESS,
CREATE_DEFAULT_ERROR_MODE, CREATE_BREAKAWAY_FROM_JOB)
__all__.extend(["CREATE_NEW_CONSOLE", "CREATE_NEW_PROCESS_GROUP",
"STD_INPUT_HANDLE", "STD_OUTPUT_HANDLE",
"STD_ERROR_HANDLE", "SW_HIDE",
"STARTF_USESTDHANDLES", "STARTF_USESHOWWINDOW",
"STARTUPINFO"])
"STARTUPINFO",
"ABOVE_NORMAL_PRIORITY_CLASS", "BELOW_NORMAL_PRIORITY_CLASS",
"HIGH_PRIORITY_CLASS", "IDLE_PRIORITY_CLASS",
"NORMAL_PRIORITY_CLASS", "REALTIME_PRIORITY_CLASS",
"CREATE_NO_WINDOW", "DETACHED_PROCESS",
"CREATE_DEFAULT_ERROR_MODE", "CREATE_BREAKAWAY_FROM_JOB"])
class Handle(int):
closed = False

1
Misc/NEWS.d/next/Library/2017-10-27.bpo-31884.bjhre9.rst Normal file
View File

@ -0,0 +1 @@
added required constants to subprocess module for setting priotity on windows

12
Modules/_winapi.c
View File

@ -1595,6 +1595,18 @@ PyInit__winapi(void)
WINAPI_CONSTANT(F_DWORD, WAIT_OBJECT_0);
WINAPI_CONSTANT(F_DWORD, WAIT_ABANDONED_0);
WINAPI_CONSTANT(F_DWORD, WAIT_TIMEOUT);
WINAPI_CONSTANT(F_DWORD, ABOVE_NORMAL_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, BELOW_NORMAL_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, HIGH_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, IDLE_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, NORMAL_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, REALTIME_PRIORITY_CLASS);
WINAPI_CONSTANT(F_DWORD, CREATE_NO_WINDOW);
WINAPI_CONSTANT(F_DWORD, DETACHED_PROCESS);
WINAPI_CONSTANT(F_DWORD, CREATE_DEFAULT_ERROR_MODE);
WINAPI_CONSTANT(F_DWORD, CREATE_BREAKAWAY_FROM_JOB);
WINAPI_CONSTANT("i", NULL);