Error regarding 3rd parameter of pthread_create()

[unclefester]

Could someone please explain to me the return type of pthread_create( )'s 3rd parameter? I know it should be a function but I keep getting the error: argument of type 'void' (Test::)(void*) ' does not match 'void * (*) (void*)'.

Here is the function that I pass to pthread_create( ):

void * Test::run(void * arg)
{   cout << "Running...";
}

And this is how I call pthread_create( ):

pthread_create(&aThread,NULL,run,NULL);

[weaknessforcats]

Test::run has to be a static function to avoid the compiler supplying the this pointer in as the first argument.