在多线程控制台程序中使用printf时的奇怪问题(跑着跑着就没有输出了)

[kangfx]

运行环境:win2000 Professional SP4
VC6无SP
ODBC连接数据库

大致如下：
写了一个控件台程序即作为Client，同时也是一个Server
在main函数中首先启动一个Client线程，该线程连接其它的服务器，如果发现连接不上时就sleep一下，然后继续连接，然后在main函数中建立了一个监听的socket，每当有一个连接进来时就启动一个新的子线程提供连接服务，在整个程序中不断的将结果通过printf函数进行输出，但是我发现过一段时间就没有输出了，然后我按CTRL + C发现又可以输出了，怎么会这样呢?

BOOL InitClientSocket( SOCKET& client, struct sockaddr_in& addrServer)
{
client = socket( AF_INET, SOCK_STREAM, NULL );
if ( INVALID_SOCKET == client )
{
printf( "%s\r\n", "创建下行的短信socket失败" );
return FALSE;
}

CIniFile IniFile;
CString strSMSSvrIP;
CString strSMSSvrPort;
IniFile.GetProfileString( "SMSSvrIP", strSMSSvrIP );
IniFile.GetProfileString( "SMSSvrPort", strSMSSvrPort );

if ( strSMSSvrIP.IsEmpty() )
{
printf( "%s\r\n", "在配置文件中配置的短信服务器地址为空!" );
return FALSE;
}

if ( strSMSSvrPort.IsEmpty() )
{
printf( "%s\r\n", "在配置文件中配置的短信服务器端口为空!" );
return FALSE;
}

printf( "%s\r\n", CString("短信服务器地址: ") + strSMSSvrIP + " 端口: " + strSMSSvrPort );

sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons( NULL );
addr.sin_addr.S_un.S_addr = INADDR_ANY;

if ( SOCKET_ERROR == bind( client, (sockaddr*)&addr, sizeof( addr ) ) )
{
printf( "%s\r\n", "绑定下行的短信socket失败!" );
return FALSE;
}

addrServer.sin_family = AF_INET;
addrServer.sin_port = htons( atoi( strSMSSvrPort ) );
addrServer.sin_addr.S_un.S_addr = inet_addr( strSMSSvrIP );

return TRUE;
}


//该线程进行下行操作,如下发广告等,其作为客户端存在
DWORD WINAPI ClientThread( LPVOID lpParameter )
{
CSMSParser SMSParser;
SOCKET client;
struct sockaddr_in addrServer;
while ( true )
{
closesocket( client );
if ( !InitClientSocket( client, addrServer ) )
{
return 0;
}
if ( SOCKET_ERROR == connect( client, (sockaddr*)&addrServer, sizeof( addrServer ) ) )
{
for ( int i = 0; i < 100000; i++ )
{
printf( "%s\r\n", "连接短信服务器失败，sleep 30秒!" );
}
// Sleep( 3 * 1000 );
continue;
}

structClient* pstruClient = new structClient;
memset( pstruClient, 0, sizeof( structClient ) );
pstruClient->m_sock = client;
pstruClient->m_TimeLastEcho = COleDateTime::GetCurrentTime();
g_CLientArr.Add( pstruClient );//注意这里要添加进去,因为在登录时需要填入SessionID

if ( !SMSParser.LoginSMSServer( client ) )
{
printf( "%s\r\n", "登录短信服务器失败，sleep 30秒!" );
// Sleep( 3 * 1000 );
g_CLientArr.Remove( pstruClient->m_sock );//登录失败时需要将其清除
continue;
}

while ( SMSParser.SendMsgReq( client ) )
{
Sleep( 500 );
}
g_CLientArr.Remove( pstruClient->m_sock );
}
return NULL;
}



int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
int nRetCode = 0;
if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
// TODO: change error code to suit your needs
cerr << _T("Fatal Error: MFC initialization failed") << endl;
nRetCode = 1;
}
else
{
WSADATA wsaData;
if(::WSAStartup(0x202,&wsaData)!=0)
{
printf("\nError in Startup session.\n");
WSACleanup();
return -1;
}

SOCKET server = socket( PF_INET, SOCK_STREAM, NULL );
if ( INVALID_SOCKET == server )
{
printf("创建监听套接字失败，请检查网络连接是否正常!\n");
return -1;
}

if ( argc == 1 )
{
printf("在启动可执行文件时请输入要绑定的端口号: 如sms.exe 80\n");
getchar();
return -1;
}

sockaddr_in addr_server;
addr_server.sin_addr.S_un.S_addr = INADDR_ANY;

UINT uListenPort;
CIniFile IniFile;
IniFile.GetProfileInt( "ListenPort", uListenPort );

addr_server.sin_port = htons( uListenPort );
addr_server.sin_family = AF_INET;
if ( SOCKET_ERROR == bind( server, (sockaddr*)&addr_server, sizeof(addr_server) ) )
{
printf("监听线程绑定到指定端口失败，请检查是否已有一个服务器程序正在运行!\n");
goto EXIT;
}

if ( SOCKET_ERROR == listen( server, 10 ) )
{
printf("调用监听线程函数listen失败!\n");
goto EXIT;
}

printf( "服务器启动成功，正在监听%d端口...\r\n", atoi( argv[ 1 ] ) );

//创建线程，用于监视是否是有效连接，对连接进行定时检验
DWORD dwCheckThreadID;
CreateThread( NULL, 8 * 1024, CheckSysBeatThread, NULL, NULL, &dwCheckThreadID );

//创建下行线程,如下发广告等工作
DWORD dwClientThreadID;
CreateThread( NULL, 8 * 1024, ClientThread, NULL, NULL, &dwClientThreadID );

while ( TRUE )
{
SOCKET client;
sockaddr_in addr_client;
int nAddrLen = sizeof(addr_client);
if ( ( client = accept( server, (sockaddr*)&addr_client, &nAddrLen ) ) == INVALID_SOCKET )
{
goto EXIT;
}

structClient* pstruClient = new structClient;
memset( pstruClient, 0, sizeof( structClient ) );
pstruClient->m_sock = client;
pstruClient->m_TimeLastEcho = COleDateTime::GetCurrentTime();
sprintf( (char*)(pstruClient->m_ucLoginPort), "%d", ntohs( addr_client.sin_port ) );

struct in_addr addr;
addr.S_un.S_addr = addr_client.sin_addr.S_un.S_addr;
char* pAddr = inet_ntoa( addr );
strcpy( (char*)pstruClient->m_ucLoginIP, pAddr );
g_CLientArr.Add( pstruClient );

DWORD dwThreadID;
HANDLE hThread = CreateThread( NULL, 8 * 1024, ServerThread, pstruClient, NULL, &dwThreadID );
CloseHandle( hThread );
}

EXIT:
closesocket( server );
}

return nRetCode;
}

[kangfx]

里面的 for ( int i = 0; i < 100000; i++ )是我后来随便加上测试的

[oyljerry]

是不是什么地方阻塞了

[freemme]

if ( SOCKET_ERROR == connect( client, (sockaddr*)&addrServer, sizeof( addrServer ) ) )
{
for ( int i = 0; i < 100000; i++ )
{
printf( "%s\r\n", "连接短信服务器失败，sleep 30秒!" );
}
// Sleep( 3 * 1000 );
continue;
}

----------------------------------------------------------------

这里有可能出现阻塞