I create two bluetooth communication between PC
The header file

 public: 
Afx_msg void OnBnClickedButton1 (); 
CEdit m_edit1; 
CEdit m_edit2; 
Afx_msg void OnEnChangeEdit2 (); 
Afx_msg void OnBnClickedStart (); 

CButton m_button_say; 

CWinThread * hThread0; 
CWinThread * hThread1; 
The SOCKET sock; 
The static UINT _cdecl onListen0 (LPVOID lpvThreadParm); 
The static UINT _cdecl onRecieve1 (LPVOID lpvThreadParm); 
The thread function: 
/////server monitoring thread/////
UINT CBLUETOOTHDlg: : onListen0 (LPVOID lpvThreadParm) 
{
//CBLUETOOTHDlg m_blu; 

Pthis CBLUETOOTHDlg *=(CBLUETOOTHDlg *) lpvThreadParm; 
//pthis - & gt; OnBnClickedStart (); 
SOCKADDR_BTH sa; 
Int sa_len=sizeof (sa); 
While (1) 
{
Memset (& amp; Sa, 0, sa_len); 
Pthis - & gt; The sock=accept (sockTCP, (LPSOCKADDR) & amp; Sa, & amp; Sa_len); 
If (SOCKET_ERROR==pthis - & gt; The sock) 
{
//AfxMessageBox (" sock listening socket failed!" ); 
} 
The else//connection success 
{

Pthis - & gt; M_edit1. SetSel (pthis - & gt; M_edit1. GetWindowTextLengthA (), pthis - & gt; M_edit1. GetWindowTextLengthA ()); 
Pthis - & gt; M_edit1. ReplaceSel (" client connection success!" ); 
Pthis - & gt; M_button_say. EnableWindow (TRUE); 
Pthis - & gt; HThread1 - & gt; ResumeThread (); 
Pthis - & gt; BThread1=TRUE; 
Pthis - & gt; HThread1=AfxBeginThread (onRecieve1 lpvThreadParm, THREAD_PRIORITY_NORMAL, 0, 0, NULL); 
} 

Why a call pthis pointer m_edit1 error: 0 xc0000005: while reading position 0 x00000048 access conflict,

CodePudding user response:

Background threads are not allowed to directly access interface, it is better to through the way of sending a message

CodePudding user response:

Multiple Threads in the User Interface of http://msdn.microsoft.com/zh-cn/library/ms810439.aspx

CodePudding user response:

PostMessage send a message to the main thread, and then the main thread to CEdit operating controls

CodePudding user response:

MFC class is not thread safe, don't directly in the thread function to access the UI thread of control information,

CodePudding user response:

The child thread cannot directly manipulate the UI
Android is,
Bypass way is to send messages, android is to use handler, win32 using postmessage