您可以使用win32job.CreateJobObject(None, "")
。虽然没有在[MSDN]: CreateJobObject function上指定,但空字符串的作用与NULL
一样。
根据上面的链接:
If the function succeeds, the return value is a handle to the job object. The handle has the JOB_OBJECT_ALL_ACCESS access right. If the object existed before the function call, the function returns a handle to the existing job object and GetLastError returns ERROR_ALREADY_EXISTS.
我写了一个小ç程序演示用途:
#include <Windows.h>
#include <stdio.h>
#define EMPTY_TEXT ""
#define DUMMY0_TEXT "dummy0"
#define DUMMY1_TEXT "dummy1"
#define DIM 12
int main() {
char* names[DIM] = { NULL, NULL, EMPTY_TEXT, EMPTY_TEXT, DUMMY0_TEXT,
DUMMY0_TEXT, EMPTY_TEXT, DUMMY0_TEXT, DUMMY1_TEXT,
NULL, DUMMY0_TEXT, DUMMY1_TEXT };
HANDLE jobs[DIM] = { NULL };
for (int i = 0; i < DIM; i++) {
jobs[i] = CreateJobObjectA(NULL, names[i]);
printf("%02d [%6s] CreateJobObject: %08X - GetLastError: %d\n", i, names[i], (long)jobs[i], GetLastError());
}
for (int i = 0; i < DIM; i++)
CloseHandle(jobs[i]);
return 0;
}
输出(内置与VStudio 2015年社区版跑):
00 [(null)] CreateJobObject: 000000D8 - GetLastError: 0
01 [(null)] CreateJobObject: 000000E0 - GetLastError: 0
02 [ ] CreateJobObject: 00000088 - GetLastError: 0
03 [ ] CreateJobObject: 000000F0 - GetLastError: 0
04 [dummy0] CreateJobObject: 000000F4 - GetLastError: 0
05 [dummy0] CreateJobObject: 000000F8 - GetLastError: 183
06 [ ] CreateJobObject: 000000E8 - GetLastError: 0
07 [dummy0] CreateJobObject: 000000FC - GetLastError: 183
08 [dummy1] CreateJobObject: 00000100 - GetLastError: 0
09 [(null)] CreateJobObject: 000000DC - GetLastError: 0
10 [dummy0] CreateJobObject: 000000E4 - GetLastError: 183
11 [dummy1] CreateJobObject: 00000104 - GetLastError: 183
你可以看到,对于"dummy0"
和"dummy"
,每一次(除了1 ST)创建一个新的对象时,该函数返回一个新的HANDLE
,但失败(GetLastError
返回183(这是ERROR_ALREADY_EXISTS
))。这不会发生NULL
和空字符串(""
)名称(从这里我明白,每次调用都会创建一个新对象,而不是递增现有对象的引用)。
的Python “翻译”:
import win32job
import win32api
DUMMY0 = "dummy00"
DUMMY1 = "dummy11"
JOB_NAMES = ["", "", DUMMY0, DUMMY0, "", DUMMY1, DUMMY0, "", DUMMY1]
if __name__ == "__main__":
handles = list()
for i, name in enumerate(JOB_NAMES):
h = win32job.CreateJobObject(None, name)
print("{} [{:10}] {} - GetLastError: {}".format(i, name, h, win32api.GetLastError()))
handles.append(h)
for h in handles:
win32api.CloseHandle(h)
输出(相同的结果Ç的情况下 - 这是自然的,因为的Python功能仅包裹下级Ç ):
(py35x64_test) c:\Work\Dev\StackOverflow\q46800142>"c:\Work\Dev\VEnvs\py35x64_test\Scripts\python.exe" a.py
0 [ ] <PyHANDLE:300> - GetLastError: 0
1 [ ] <PyHANDLE:308> - GetLastError: 0
2 [dummy00 ] <PyHANDLE:580> - GetLastError: 0
3 [dummy00 ] <PyHANDLE:584> - GetLastError: 183
4 [ ] <PyHANDLE:588> - GetLastError: 0
5 [dummy11 ] <PyHANDLE:592> - GetLastError: 0
6 [dummy00 ] <PyHANDLE:596> - GetLastError: 183
7 [ ] <PyHANDLE:600> - GetLastError: 0
8 [dummy11 ] <PyHANDLE:604> - GetLastError: 183
关于“方”的问题:不幸的是,我不熟悉那个话题。
如果有帮助,我下载了pywin32源代码。它似乎使用swig: '''// @pyswig | CreateJobObject |创建或打开一个作业对象。 PyHANDLE CreateJobObject( SECURITY_ATTRIBUTES * lpJobAttributes,// @pyparm | jobAttributes || WCHAR * lpName); // @pyparm unicode | name ||'''' –