[英]C++ Exception or passing arguments to thread
我正在嘗試使用CreateThread()
將結構傳遞給我的線程,這是我的結構:
struct Secure
{
int UID;
LPVOID MainClass;
};
這是我調用CreateThread()
Secure m_Secure = {Room->g_User[PlayerNumber].UID,this};
CreateThread(NULL,NULL,(LPTHREAD_START_ROUTINE)SecureThread,&m_Secure,NULL,NULL);
其中第一個是整數,第二個是指向當前類的指針。
而且,這是我的主題,我認為這是問題所在
HRESULT WINAPI SecureThread(LPVOID Param)
{
int UID = -1, UserNumber, i;
Secure* m_Secure = (Secure*)Param;
UID = m_Secure->UID;
CGGCBotDlg *h_MainClass = (CGGCBotDlg*)m_Secure->MainClass;
if (UID == -1) return 0;
Sleep(25000);
for (i = 0; i < TOTAL_CLIENTS; i++)
{
if (h_MainClass->Room->g_User[i].UID == UID)
{
UserNumber = i;
break;
}
}
if( h_MainClass->Room->g_User[UserNumber].IsFree == false && h_MainClass->Room->g_User[UserNumber].Secured == false)
h_MainClass->Room->Kick(h_MainClass->Room->g_User[UserNumber].UID,"Didn't Authorized");
return 0;
}
當創建此線程時,程序崩潰,這是例外:
First-chance exception at 0x00EC3548 in GGCRoomServer.exe: 0xC0000005: Access violation reading location 0x5D00009C.
Unhandled exception at 0x00EC3548 in GGCRoomServer.exe: 0xC0000005: Access violation reading location 0x5D00009C.
創建一個堆變量來保存數據並將其傳遞給線程。
Secure * m_Secure = new Secure();
m_Secure->UID = g_User[PlayerNumber].UID;
m_Secure->MainClass = this;
CreateThread(NULL,NULL,(LPTHREAD_START_ROUTINE)SecureThread,m_Secure,NULL,NULL);
獲取線程中的數據,並在完成后刪除
RESULT WINAPI SecureThread(LPVOID Param)
{
int UID = -1, UserNumber, i;
Secure* m_Secure = (Secure*)Param;
....
delete m_Secure;
return 0;
}
看起來你在這里將一個局部變量的地址傳遞給一個線程
Secure m_Secure = {Room->g_User[PlayerNumber].UID,this};
CreateThread(NULL,NULL,(LPTHREAD_START_ROUTINE)SecureThread,&m_Secure,NULL,NULL);
作為局部變量, m_Secure
將超出范圍,並在函數完成執行后被銷毀。 此外,m_Secure很可能是在堆棧上創建的。 將一個線程的堆棧變量地址傳遞給另一個是一個壞主意
您需要在堆上創建變量
就像是
CreateThread(NULL,NULL,(LPTHREAD_START_ROUTINE)SecureThread,new Secure(...),NULL,NULL);
^^^^^^^^^^^^^^
並且不要忘記之后刪除指針
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.