c++ - WaitForSingleObject 给出无效句柄

Question

h=CreateFile("c:\\test.txt",GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_READONLY|FILE_FLAG_OVERLAPPED,NULL);

    OVERLAPPED ol2;
    memset(&ol2,0,sizeof(OVERLAPPED));
    ol2.hEvent=CreateEvent(NULL,false,false,NULL);
    if(!ReadFile(h,iobuffer+pointsize,value,NULL,&ol2))
    printf("Last Error %u",GetLastError());
    if(WaitForSingleObject(&ol2.hEvent,INFINITE)!=0){
        printf("Last Error %u \n",GetLastError());

    }

WaitForsingleobject 返回无效句柄，但我不明白为什么...

Answer 1

我觉得应该这样写:

if(WaitForSingleObject(ol2.hEvent,INFINITE)!=0){
            printf("Last Error %u \n",GetLastError());

注意删除 ol2.hEvent 之前的 &