如何将int参数传递给CreateThread回调函数？我试试看：
DWORD WINAPI mHandler(LPVOID sId) {
...
arr[(int)sId]
...
}
int id=1;
CreateThread(NULL,NULL,mHandler,(LPVOID)id,NULL);
但我收到警告：
warning C4311: 'type cast' : pointer truncation from 'LPVOID' to 'int' warning C4312: 'type cast' : conversion from 'int' to 'LPVOID' of greater size
解决方法
传递整数的地址而不是其值：
// parameter on the heap to avoid possible threading bugs
int* id = new int(1);
CreateThread(NULL,id,NULL);
DWORD WINAPI mHandler(LPVOID sId) {
// make a copy of the parameter for convenience
int id = *static_cast<int*>(sId);
delete sId;
// now do something with id
}
