这是第一次将libsigc ++用于信号槽, 我有两个功能,他们工作正常,我的方案: 我写了一个函数作为布尔函数,如果socket有recv的数据,它返回true:
bool Socket::isDataReady()
{
void *buffer = malloc (FRAMEBUFFER + 6);
sockaddr_in from;
socklen_t fromLength = sizeof( from );
if (::recvfrom(this->socketFD,buffer,FRAMEBUFFER + 6, 0, (sockaddr *)&this->getSocketAddressStructureOfServer(), &fromLength ) == -1)
{
if (errno == EAGAIN || errno == EWOULDBLOCK)
return false;
}
return true;
}
所以,我写了一个从net获取数据的函数:
int Socket::readDatagrams(unsigned char *buffer, string &srcAddress, unsigned short int & srcPort)
{
unsigned int maximumPacketSize = FRAMEBUFFER + 6;
int returnValue ;
sockaddr_in from;
socklen_t fromLength = sizeof( from );
int receivedBytes;
fromLength = sizeof(this->getSocketAddressStructureOfServer());
receivedBytes = recvfrom( this->socketFD, buffer, maximumPacketSize, 0, (sockaddr *)&this->getSocketAddressStructureOfServer(), &fromLength );
returnValue = receivedBytes;
if ( receivedBytes <= 0 )
returnValue = -1;
/// exporting data
//
srcAddress = inet_ntoa(this->getSocketAddressStructureOfServer().sin_addr);
srcPort = ntohs( ( unsigned short int)this->getSocketAddressStructureOfServer().sin_port );
return returnValue;
}
我有UDP服务器并在构造函数中初始化所有内容,所以我需要告诉每当isDataReady()为true时,readDatagram本身就会执行。如何用libsigc ++编写代码? 我读了他们的教程,但是它的教程没有说func为sig。
答案 0 :(得分:1)
我知道你定义了
sigc::signal<bool> ptr;
在你班级的身体里。 然后,如果您想要在班级中进行连接,请致电:
this->ptr.connect(sigc::mem_fun(*this,&NetworkSocket::createThread));
但我不知道故事的其余部分......