bionic (3) IOCallback.3I.gz

NAME

       IOCallback - generic callback class for readers, writers, or I/O exception handlers

SYNOPSIS

       #include <Dispatch/iocallback.h>

DESCRIPTION

       For  convenience,  the  macros  defined  in iocallback.h allow the user to define an iohandler which does
       nothing more than call an arbitrary object's member function.  The actual code to read data from  a  file
       descriptor,  write  data  to a file descriptor, handle an I/O exception on a file descriptor, or handle a
       timer's expiration can reside in any arbitrary class rather than in the iohandler.

MACROS

       declareIOCallback(T)
              Declare an iocallback type for the given class type T.

       implementIOCallback(T)
              Emit code at this point to implement the iocallback's member functions.

       IOCallback(T)* instance = new IOCallback(T)(...)
              Define an instance of the iocallback type for the given class type T.

CONSTRUCTORS

       typedef int T::IOReady(T)(int fd)
       typedef void T::IOTimer(T)(long sec, long usec)

       IOCallback(T)(T*, IOReady(T)* in, IOReady(T)* out = nil, IOReady(T)* ex = nil)
       IOCallback(T)(T*, IOTimer(T)*, IOReady(T)* in = nil, IOReady(T)* out = nil, IOReady(T)* ex = nil)
              Construct an instance of the iocallback type that will call the  given  member  functions  of  the
              given  class  type  T's  instance.   Note that you do not have to use the IOReady(T) or IOTimer(T)
              macros; rather, you only have to pass the address of a T member function, such as &T::inputReady.

SEE ALSO

       Dispatcher(3I), IOHandler(3I)