matu3ba
commented
6 months ago From https://devblogs.microsoft.com/oldnewthing/20130405-00/?p=4743
#define [_UNICODE](http://blogs.msdn.com/b/oldnewthing/archive/2004/02/12/71851.aspx)
#define STRICT
#include <windows.h>
#include <stdio.h>
#include <atlbase.h>
#include <atlalloc.h>
#include <shlwapi.h>
int __cdecl wmain(int argc, PWSTR argv[])
{
CHandle Job(CreateJobObject(nullptr, nullptr));
if (!Job) {
wprintf(L”CreateJobObject, error %d\n”, GetLastError());
return 0;
}
CHandle IOPort(CreateIoCompletionPort(INVALID_HANDLE_VALUE,
nullptr, 0, 1));
if (!IOPort) {
wprintf(L”CreateIoCompletionPort, error %d\n”,
GetLastError());
return 0;
}
JOBOBJECT_ASSOCIATE_COMPLETION_PORT Port;
Port.CompletionKey = Job;
Port.CompletionPort = IOPort;
if (!SetInformationJobObject(Job,
JobObjectAssociateCompletionPortInformation,
&Port, sizeof(Port))) {
wprintf(L”SetInformation, error %d\n”, GetLastError());
return 0;
}
PROCESS_INFORMATION ProcessInformation;
STARTUPINFO StartupInfo = { sizeof(StartupInfo) };
PWSTR [CommandLine](http://blogs.msdn.com/b/oldnewthing/archive/2011/08/15/10195600.aspx) = PathGetArgs(GetCommandLine());
if (!CreateProcess(nullptr, CommandLine, nullptr, nullptr,
FALSE, CREATE_SUSPENDED, nullptr, nullptr,
&StartupInfo, &ProcessInformation)) {
wprintf(L”CreateProcess, error %d\n”, GetLastError());
return 0;
}
if (!AssignProcessToJobObject(Job,
ProcessInformation.hProcess)) {
wprintf(L”Assign, error %d\n”, GetLastError());
return 0;
}
ResumeThread(ProcessInformation.hThread);
CloseHandle(ProcessInformation.hThread);
CloseHandle(ProcessInformation.hProcess);
DWORD CompletionCode;
ULONG_PTR CompletionKey;
LPOVERLAPPED Overlapped;
while (GetQueuedCompletionStatus(IOPort, &CompletionCode,
&CompletionKey, &Overlapped, INFINITE) &&
!((HANDLE)CompletionKey == Job &&
CompletionCode == JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO)) {
wprintf(L”Still waiting…\n”);
}
wprintf(L”All done\n”);
return 0;
}
See CI, which can be locally reproduced with a few attempts and/or under heavy system load:
Probably Windows has a dedicated method to wait for process group termination.