GetCurrentThread的伪句柄陷阱

今天写了个测试程序,想要看看线程的创建,退出内核模式时间,和用户模式时间

#include 
#include 
#include 
using namespace std;
unsigned int WINAPI WorkThread(void* param);
    typedef HANDLE (WINAPI * OPENTHREADFUN)(DWORD dwDesiredAccess,BOOL bInheritHandle,DWORD dwThreadId);  
int main()
{
    FILETIME CreatTime;
    FILETIME ExitTime;
    FILETIME KernelTime;
    FILETIME UserTime;
    HANDLE hThread;
    GetThreadTimes(GetCurrentThread(),&CreatTime,&ExitTime,&KernelTime,&UserTime);
    cout<<"CreatTime:"<","<cout<<"ExitTime:"<","<cout<<"KernelTime:"<","<cout<<"UserTime:"<","<//DuplicateHandle(GetCurrentProcess(),GetCurrentThread(),GetCurrentProcess(),&hThread,0,false,DUPLICATE_SAME_ACCESS);
    HANDLE hThreadNew=(HANDLE) _beginthreadex(NULL,0,WorkThread,(void*)hThread,0,NULL);
    WaitForSingleObject(hThreadNew,INFINITE);
    CloseHandle(hThreadNew);
    CloseHandle(hThread);
    system("pause");
    return 0;
}

unsigned int WINAPI WorkThread(void* param)
{
    HANDLE hThread=(HANDLE)param;
    if(NULL==hThread)
    {
        return 1;
    }
    FILETIME CreatTime;
    FILETIME ExitTime;
    FILETIME KernelTime;
    FILETIME UserTime;
    GetThreadTimes(hThread,&CreatTime,&ExitTime,&KernelTime,&UserTime);
    cout<<"CreatTime:"<","<cout<<"ExitTime:"<","<cout<<"KernelTime:"<","<cout<<"UserTime:"<","<return 0;
}

其实以上代码的想法很简单,就是通过GetThreadTime来查看主线程的创建,退出,内核,用户时间
另外我也想在子线程中调用GetThreadTime来查看主线程的创建,退出,内核,用户时间
测试结果:
GetCurrentThread的伪句柄陷阱_第1张图片
但是我发现在主线程中的调用结果和子线程中的调用结果不一样,为什么呢?我明明把主线程的句柄通过param参数传递给子线程了
假设在子线程中的调用结果不是主线程的时间难道是子线程的时间
GetCurrentThread()是个伪句柄,我把这个值传递给子线程,难道,在子线程中调用GetCurrentThread返回的值和主线程中调GetCurrentThread返回的值是一样的,这样就解释了为什么时间会不一样,因为传递这个值相当于传递GetThreadTime的第一个参数传递GetCurrentThread函数的返回值
我做了个测试
在原有代码的子线程函数上加上了显示GetCurrentThread返回的句柄值

unsigned int WINAPI WorkThread(void* param)
{
    HANDLE hThread=(HANDLE)param;
    //cout<<"ThreadHandle:"<
    FILETIME CreatTime;
    FILETIME ExitTime;
    FILETIME KernelTime;
    FILETIME UserTime;
    cout<<"主线程:"<cout<<"子线程:"<cout<<"CreatTime:"<","<cout<<"ExitTime:"<","<cout<<"KernelTime:"<","<cout<<"UserTime:"<","<return 0;
}

不出我所料,果然是一样的,附上测试结果
GetCurrentThread的伪句柄陷阱_第2张图片
敬请下回分解

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