Question

This is somewhat similiar to this : pthread function from a class

But the function that’s getting called in the end is referencing the this pointer, so it cannot be made static.

void * Server::processRequest()
{
     std::string tmp_request, outRequest;
     tmp_request = this->readData();
     outRequest = this->parse(tmp_request);
     this->writeReply(outRequest);
}

void * LaunchMemberFunction(void * obj)
{
    return ((Server *)obj)->processRequest();
}

and then the pthread_create

Server SServer(soc);

pthread_create(&handler[tcount], &attr, (void*)LaunchMemberFunction,(void*)&SServer);

errors:

SS_Twitter.cpp:819: error: invalid conversion from void* to void* ()(void)
SS_Twitter.cpp:819: error: initializing argument 3 of int pthread_create(pthread_t*, const pthread_attr_t*, void* ()(void), void*)

Answer 1

You are casting the third argument to a void* ((void*), and then getting an error, as void* cannot be cast to a function pointer.

I believe it should compile if you just use &LaunchMemberFunction instead.