[英]Application.Run(form) never returns (after using System::Management)
我有一个类库程序集,一旦加载该类程序集便会打开一个表单(form1),并在提示时form1打开其他表单(form2)。 每种形式都在单独的线程中运行,这是因为每种形式都运行flashweave应用程序,并且出于性能方面的考虑,我需要在单独的主题中运行它们。 如果我使用用C#编写的托管加载器加载库,则一切正常。 如果我使用混合的clr / c ++程序集加载库,则当form2关闭时,Application.Run()不会返回,从而导致许多卡住的线程。 我也尝试使用Thread.Abort()强制中止线程,但仍然不会中止线程。 如果我关闭form1 application.run()返回,它的线程可以停止。 我还尝试打开简单的空表单而不是form2,而没有其中的任何flashwave对象,但仍然不返回。
也许问题与我收到的消息有关:
60秒钟以来,CLR无法从COM上下文0x197060过渡到COM上下文0x196ef0。 拥有目标上下文/公寓的线程很可能要么执行非泵送等待,要么处理很长时间运行的操作而不泵送Windows消息。 这种情况通常会对性能产生负面影响,甚至可能导致应用程序变得无响应或内存使用量随时间不断累积。 为避免此问题,所有单线程单元(STA)线程都应使用泵送等待原语(例如CoWaitForMultipleHandles),并在长时间运行的操作中定期泵送消息。
关于form2的打开:
private void OpenTable()
{
if (!this.InvokeRequired)
{
Thread TableRun = new Thread(new ThreadStart(OpenTable));
TableRun.ApartmentState = ApartmentState.STA;
TableRun.IsBackground = false;
TableRun.Name = "T2";
TableRun.Start();
return;
}
try
{
FormTable T = new FormTable(;
T.MyThread = Thread.CurrentThread;
Application.Run(T);
}
catch (Exception ex)
{
}
}
卡住线程的堆栈跟踪:
ntdll.dll!_ZwWaitForMultipleObjects@20()+ 0x15字节ntdll.dll!_ZwWaitForMultipleObjects@20()+ 0x15字节KernelBase.dll!_WaitForMultipleObjectsEx@20()+ 0x36字节kernel32.dll!_WaitForMultipleObjectsEx8字节+0(15) dll!_RealMsgWaitForMultipleObjectsEx @ 20()+ 0xe2字节ole32.dll!CCliModalLoop :: BlockFn()+ 0x96字节
ole32.dll!_CoWaitForMultipleHandles@20()-0x51b9字节mscorwks.dll!NT5WaitRoutine()+ 0x39字节mscorwks.dll!MsgWaitHelper()+ 0x97字节mscorwks.dll!Thread :: DoAppropriateAptStateWait(5)-0x97b :: DoAppropriateWaitWorker()+ 0x104字节mscorwks.dll!Thread :: DoAppropriateWait()+ 0x40字节mscorwks.dll!CLREvent :: WaitEx()+ 0x1438a9字节
mscorwks.dll!CLREvent :: Wait()+ 0x17字节
mscorwks.dll!WKS :: GCHeap :: FinalizerThreadWait()+ 0xec字节mscorwks.dll!ReleaseRCWsInCaches()+ 0xe34fd字节
mscorwks.dll!ReleaseRCWsInCachesNoThrow()+ 0x67字节mscorwks.dll!Thread :: CleanupCOMState()+ 0x1b8f83字节mscorwks.dll!Thread :: OnThreadTerminate()+ 0x46字节mscorwks.dll!DestroyThread()+ 0x3b字节
mscorwks.dll!ThreadNative :: KickOffThread()+ 0xf2字节mscorwks.dll!Thread :: intermediateThreadProc()+ 0x46字节kernel32.dll!@ BaseThreadInitThunk @ 12()+ 0x12字节
关于显示第一个线程的代码是:
//c++ code
Assembly::form^ f= gcnew Assembly::form() ;
f->Load();
gcroot<Assembly::form^>* dsa3_gc_p= new gcroot<Assembly::form^>(f);
this->obMainLib = (void *)dsa3_gc_p;
//------------------------
//The c++ loader just calls the Load() method
//c#library
public void Load()
{
FormThread = new Thread(new ThreadStart(this.Start));
FormThread.Name = "T7";
FormThread.IsBackground = true;
FormThread.SetApartmentState(ApartmentState.STA);
FormThread.Start();
}
private void Start()
{
Config = GlobalConfig.GetConfig(GlobalConfig.ConfigurationFile);
HttpInterface = new DHttpInterface(Config);
Lobby = new FormLobby(HttpInterface, false);
WorkerThread = new Thread(new ThreadStart(this.Start));
WorkerThread.Name = "T6";
WorkerThread.IsBackground = true;
WorkerThread.ApartmentState = ApartmentState.STA;
WorkerThread.Start();
Application.Run(Lobby);
Config.SaveToDisk();
}
新闻:最后,我发现了产生这种行为的原因。 在实例化c#库之前,加载程序尝试使用.net System :: Management获取cpu序列,如果我删除了该部分,则一切正常。 这是有罪的部分:
std::string Loader::GetCPUID()
{
std::string lsCPUID = "";
try
{
System::Management::ManagementObjectCollection^ moReturn = nullptr;
System::Management::ManagementObjectSearcher^ moSearch ;
moSearch = gcnew System::Management::ManagementObjectSearcher("Select * from Win32_Processor");
moReturn = moSearch->Get();
for each ( System::Management::ManagementObject^ mo in moReturn )
{
char * chp = (char *) System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(mo["ProcessorID"]->ToString()).ToPointer();
lsCPUID.assign(chp);
}
}
catch(System::Exception^ ex )
{
}
return lsCPUID;
}
谢谢。
您是否有可能从MTA线程调用OpenTable,而InvokeRequired返回的值是true,因此它直接创建MTA线程上的Application.Run()而不是创建另一个STA线程?
尝试改为从STA线程调用Application.Run()...
我终于找到了路。 我创建了一个新的AppDomain,我运行了获取CPU序列的方法,然后卸载了该域,以便卸载导致问题的System :: Management库。
ref class MarshalByRefType:MarshalByRefObject {public://通过代理调用此方法。
std::string GetCPUID()
{
//char * chp = (char *) System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(R671::R671::Value()).ToPointer();
std::string lsCPUID = "";
//return lsCPUID.assign(chp);
try
{
System::Management::ManagementObjectCollection^ moReturn = nullptr;
System::Management::ManagementObjectSearcher^ moSearch ;
moSearch = gcnew System::Management::ManagementObjectSearcher("Select * from Win32_Processor");
moReturn = moSearch->Get();
for each ( System::Management::ManagementObject^ mo in moReturn )
{
char * chp = (char *) System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(mo["ProcessorID"]->ToString()).ToPointer();
lsCPUID.assign(chp);
}
}
catch(System::Exception^ ex )
{
}
AppDomainSetup^ ads = AppDomain::CurrentDomain->SetupInformation;
String^ str = String::Format("AppName={0}, AppBase={1}, ConfigFile={2}",
ads->ApplicationName,
ads->ApplicationBase,
ads->ConfigurationFile);
char * chp = (char *) System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(str).ToPointer();
lsCPUID.assign(chp);
return lsCPUID;
}
}
class Loader
{
std::string GetCPUID()
{
String^ callingDomainName = Thread::GetDomain()->FriendlyName;
// Construct and initialize settings for a second AppDomain.
AppDomainSetup^ ads = gcnew AppDomainSetup();
ads->ApplicationBase =
"file:///" + Assembly::GetExecutingAssembly()->Location;
ads->DisallowBindingRedirects = false;
ads->DisallowCodeDownload = true;
ads->ConfigurationFile =
AppDomain::CurrentDomain->SetupInformation->ConfigurationFile;
// Create the second AppDomain.
AppDomain^ ad2 = AppDomain::CreateDomain("AD #2",
AppDomain::CurrentDomain->Evidence, ads);
String^ sam = R671::R671::typeid->FullName;
// Create an instance of MarshalbyRefType in the second AppDomain.
// A proxy to the object is returned.
MarshalByRefType^ mbrt =
(MarshalByRefType^) ad2->CreateInstanceFromAndUnwrap(
Assembly::GetExecutingAssembly()->Location,
MarshalByRefType::typeid->FullName
);
string lsCPUID;
//char * chp = (char *) System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(mbrt2->Value()).ToPointer();
lsCPUID = mbrt->GetCPUID();
try
{
AppDomain::Unload(ad2);
}
catch ( AppDomainUnloadedException^ /*e*/ )
{
}
return lsCPUID;
}
void Load()
{
//do things
std:string cpuid = this->GetCPUID();
//do things
//load c# library and open forms
}
}
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