su_osx_runloop.c

Sofia SIP is an open-source SIP User-Agent library, compliant with the IETF RFC3261 specification.

#endif
  
}

/** @internal Send a message to the port. */
int su_osx_port_send(su_port_t *self, su_msg_r rmsg)
{
  CFRunLoopRef rl;

  if (self) {
    int wakeup;

    //XXX - mela SU_OSX_PORT_LOCK(self, "su_osx_port_send");
    
    wakeup = self->sup_base->sup_head == NULL;

    *self->sup_base->sup_tail = rmsg[0]; rmsg[0] = NULL;
    self->sup_base->sup_tail = &(*self->sup_base->sup_tail)->sum_next;

#if SU_HAVE_MBOX
    /* if (!pthread_equal(pthread_self(), self->sup_tid)) */
    if (wakeup)
    {
      assert(self->sup_mbox[MBOX_SEND] != INVALID_SOCKET);

      if (send(self->sup_mbox[MBOX_SEND], "X", 1, 0) == -1) {
#if HAVE_SOCKETPAIR
	if (su_errno() != EWOULDBLOCK)
#endif
	  su_perror("su_msg_send: send()");
      }
    }
#endif

    //XXX - mela SU_OSX_PORT_UNLOCK(self, "su_osx_port_send");

    rl = CFRunLoopGetCurrent();
    CFRunLoopWakeUp(rl);

    return 0;
  }
  else {
    su_msg_destroy(rmsg);
    return -1;
  }
}
static int o_count;

/** @internal
 *
 *  Register a @c su_wait_t object. The wait object, a callback function and
 *  a argument pointer is stored in the port object.  The callback function
 *  will be called when the wait object is signaled.
 *
 *  Please note if identical wait objects are inserted, only first one is
 *  ever signalled.
 * 
 * @param self	     pointer to port
 * @param root	     pointer to root object
 * @param waits	     pointer to wait object
 * @param callback   callback function pointer
 * @param arg	     argument given to callback function when it is invoked
 * @param priority   relative priority of the wait object 
 *              (0 is normal, 1 important, 2 realtime)
 * 
 * @return
 *   The function @su_osx_port_register returns nonzero index of the wait object, 
 *   or -1 upon an error.  */
int su_osx_port_register(su_port_t *self,
			 su_root_t *root, 
			 su_wait_t *wait, 
			 su_wakeup_f callback,
			 su_wakeup_arg_t *arg,
			 int priority)
{
  int i, j, n;
  CFRunLoopRef rl;
  CFRunLoopSourceRef *sources, source;
  CFSocketRef cf_socket, *sockets;
  int events = 0;
  struct osx_magic *osx_magic = NULL;
  CFSocketContext cf_socket_cntx[1] = {{0, NULL, NULL, NULL, NULL}};
  CFOptionFlags flags = 0;

  // XXX - mela assert(SU_OSX_PORT_OWN_THREAD(self));

  n = self->sup_n_waits;

  if (n >= SU_WAIT_MAX)
    return su_seterrno(ENOMEM);

  if (n >= self->sup_size_waits) {
    /* Reallocate size arrays */
    int size;
    int *indices;
    int *reverses;
    su_wait_t *waits;
    su_wakeup_f *wait_cbs;
    su_wakeup_arg_t **wait_args;
    su_root_t **wait_tasks;

    if (self->sup_size_waits == 0)
      size = su_root_size_hint;
    else 
      size = 2 * self->sup_size_waits;

    if (size < SU_WAIT_MIN)
      size = SU_WAIT_MIN;

    /* Too large */
    if (-3 - size > 0)
      return (errno = ENOMEM), -1;

    indices = realloc(self->sup_indices, (size + 1) * sizeof(*indices));
    if (indices) {
      self->sup_indices = indices;

      for (i = self->sup_size_waits; i <= size; i++)
	indices[i] = -1 - i;
    }

    reverses = realloc(self->sup_reverses, size * sizeof(*waits));
    if (reverses) {
      for (i = self->sup_size_waits; i < size; i++)
	reverses[i] = -1;
      self->sup_reverses = reverses;
    }
      
    sources = realloc(self->sup_sources, size * sizeof(*sources));
    if (sources)
      self->sup_sources = sources;

    sockets = realloc(self->sup_sockets, size * sizeof(*sockets));
    if (sockets)
      self->sup_sockets = sockets;

    waits = realloc(self->sup_waits, size * sizeof(*waits));
    if (waits)
      self->sup_waits = waits;

    wait_cbs = realloc(self->sup_wait_cbs, size * sizeof(*wait_cbs));
    if (wait_cbs)
      self->sup_wait_cbs = wait_cbs;

    wait_args = realloc(self->sup_wait_args, size * sizeof(*wait_args));
    if (wait_args)
      self->sup_wait_args = wait_args;

    /* Add sup_wait_roots array, if needed */
    wait_tasks = realloc(self->sup_wait_roots, size * sizeof(*wait_tasks));
    if (wait_tasks) 
      self->sup_wait_roots = wait_tasks;

    if (!(indices && 
	  reverses && sources && sockets && waits && wait_cbs && wait_args && wait_tasks)) {
      return -1;
    }

    self->sup_size_waits = size;
  }

  i = -self->sup_indices[0]; assert(i <= self->sup_size_waits);

  if (priority > 0) {
    /* Insert */
    for (n = self->sup_n_waits; n > 0; n--) {
      j = self->sup_reverses[n-1]; assert(self->sup_indices[j] == n - 1);
      self->sup_indices[j] = n;
      self->sup_reverses[n] = self->sup_reverses[n-1];
      self->sup_sources[n] = self->sup_sources[n-1];
      self->sup_sockets[n] = self->sup_sockets[n-1];
      self->sup_waits[n] = self->sup_waits[n-1];
      self->sup_wait_cbs[n] = self->sup_wait_cbs[n-1];
      self->sup_wait_args[n] = self->sup_wait_args[n-1];
      self->sup_wait_roots[n] = self->sup_wait_roots[n-1];	
    }

    self->sup_pri_offset++;
  }
  else {
    /* Append - no need to move anything */
    n = self->sup_n_waits;
  }

  self->sup_n_waits++;

  self->sup_indices[0] = self->sup_indices[i];  /* Free index */
  self->sup_indices[i] = n;

  self->sup_reverses[n] = i;
  self->sup_waits[n] = *wait;
  self->sup_wait_cbs[n] = callback;
  self->sup_wait_args[n] = arg;
  self->sup_wait_roots[n] = root;

  self->sup_registers++;

  /* XXX -- mela: leak, leak -- free() somewheeeere */
  osx_magic = calloc(1, sizeof(*osx_magic));
  osx_magic->o_port = self;
  osx_magic->o_current = i;
  osx_magic->o_count = ++o_count;
  cf_socket_cntx->info = osx_magic;

  events = map_poll_event_to_cf_event(wait->events);

  cf_socket = CFSocketCreateWithNative(NULL,
				       (CFSocketNativeHandle) su_wait_socket(wait),
				       events, su_osx_port_socket_cb, cf_socket_cntx);

  flags = CFSocketGetSocketFlags(cf_socket);
  flags &= ~kCFSocketCloseOnInvalidate;

  CFSocketSetSocketFlags(cf_socket, flags);

  CFRetain(cf_socket);
  source = CFSocketCreateRunLoopSource(NULL, cf_socket, 0);

  SU_DEBUG_9(("source(%p): count %u index %d\n", source, o_count, i));

  rl = CFRunLoopGetCurrent();

  CFRunLoopAddSource(rl, source, kCFRunLoopDefaultMode);

  CFRetain(source);
  self->sup_sources[n] = source;
  self->sup_sockets[n] = cf_socket;

  CFRunLoopWakeUp(rl);

  /* Just like epoll, we return -1 or positive integer */

  return i;
}

/** Deregister a su_wait_t object. */
static
int su_osx_port_deregister0(su_port_t *self, int i)
{
  CFRunLoopRef rl;
  int n, N, *indices, *reverses;

  indices = self->sup_indices;
  reverses = self->sup_reverses;

  n = indices[i]; assert(n >= 0); assert(i == reverses[n]);

  N = --self->sup_n_waits;
  
  rl = CFRunLoopGetCurrent();
  CFSocketInvalidate(self->sup_sockets[n]);
  CFRelease(self->sup_sockets[n]);
  CFRunLoopRemoveSource(rl, self->sup_sources[n], kCFRunLoopDefaultMode);
  CFRelease(self->sup_sources[n]);

  CFRunLoopWakeUp(rl);

  if (n < self->sup_pri_offset) {
    int j = --self->sup_pri_offset;
    if (n != j) {
      assert(reverses[j] > 0);
      assert(indices[reverses[j]] == j);
      indices[reverses[j]] = n;
      reverses[n] = reverses[j];

      self->sup_sources[n] = self->sup_sources[j];
      self->sup_sockets[n] = self->sup_sockets[j];
      self->sup_waits[n] = self->sup_waits[j];
      self->sup_wait_cbs[n] = self->sup_wait_cbs[j];
      self->sup_wait_args[n] = self->sup_wait_args[j];
      self->sup_wait_roots[n] = self->sup_wait_roots[j];
      n = j;
    }
  }

  if (n < N) {
    assert(reverses[N] > 0);
    assert(indices[reverses[N]] == N);

    indices[reverses[N]] = n;
    reverses[n] = reverses[N];

    self->sup_sources[n] = self->sup_sources[N];
    self->sup_sockets[n] = self->sup_sockets[N];
    self->sup_waits[n] = self->sup_waits[N];
    self->sup_wait_cbs[n] = self->sup_wait_cbs[N];
    self->sup_wait_args[n] = self->sup_wait_args[N];
    self->sup_wait_roots[n] = self->sup_wait_roots[N];
    n = N;
  }


  reverses[n] = -1;
  memset(&self->sup_waits[n], 0, sizeof self->sup_waits[n]);
  self->sup_sources[n] = NULL;
  self->sup_sockets[n] = NULL;
  self->sup_wait_cbs[n] = NULL;
  self->sup_wait_args[n] = NULL;
  self->sup_wait_roots[n] = NULL;
  
  indices[i] = indices[0];
  indices[0] = -i;

  self->sup_registers++;

  return i;
}


/** Unregister a su_wait_t object.
 *  
 *  The function su_osx_port_unregister() unregisters a su_wait_t object. The
 *  wait object, a callback function and a argument are removed from the
 *  port object.
 * 
 * @param self     - pointer to port object
 * @param root     - pointer to root object
 * @param wait     - pointer to wait object
 * @param callback - callback function pointer (may be NULL)
 * @param arg      - argument given to callback function when it is invoked 
 *                   (may be NULL)
 * 
 * @return Nonzero index of the wait object, or -1 upon an error.
 */
int su_osx_port_unregister(su_port_t *self,
		       su_root_t *root, 
		       su_wait_t *wait,	
		       su_wakeup_f callback, /* XXX - ignored */
		       su_wakeup_arg_t *arg)
{
  int n, N;

  assert(self);
  // XXX - mela assert(SU_OSX_PORT_OWN_THREAD(self));

  N = self->sup_n_waits;

  for (n = 0; n < N; n++) {
    if (SU_WAIT_CMP(wait[0], self->sup_waits[n]) == 0) {
      return su_osx_port_deregister0(self, self->sup_reverses[n]);
    }
  }

  su_seterrno(ENOENT);

  return -1;
}

/** Deregister a su_wait_t object.
 *  
 *  The function su_osx_port_deregister() deregisters a su_wait_t registrattion. 
 *  The wait object, a callback function and a argument are removed from the
 *  port object.
 * 
 * @param self     - pointer to port object
 * @param i        - registration index
 * 
 * @return Index of the wait object, or -1 upon an error.
 */
int su_osx_port_deregister(su_port_t *self, int i)
{
  su_wait_t wait[1] = { SU_WAIT_INIT };
  int retval;

  assert(self);
  // XXX - mela assert(SU_OSX_PORT_OWN_THREAD(self));

  if (i <= 0 || i > self->sup_size_waits)
    return su_seterrno(EBADF);

  if (self->sup_indices[i] < 0)
    return su_seterrno(EBADF);
    
  retval = su_osx_port_deregister0(self, i);

  su_wait_destroy(wait);

  return retval;
}


/** @internal
 * Unregister all su_wait_t objects.
 *
 * The function su_osx_port_unregister_all() unregisters all su_wait_t objects
 * and destroys all queued timers associated with given root object.
 * 
 * @param  self     - pointer to port object
 * @param  root     - pointer to root object
 * 
 * @return Number of wait objects removed.
 */
int su_osx_port_unregister_all(su_port_t *self, 
			   su_root_t *root)
{
  int i, j, index, N;
  int                *indices, *reverses;
  su_wait_t          *waits;
  su_wakeup_f        *wait_cbs;
  su_wakeup_arg_t   **wait_args;
  su_root_t         **wait_roots;
  CFRunLoopRef        rl;
  CFRunLoopSourceRef *sources;
  CFSocketRef        *sockets;

  // XXX - assert(SU_OSX_PORT_OWN_THREAD(self));

  N          = self->sup_n_waits;
  indices    = self->sup_indices;
  reverses   = self->sup_reverses;
  sources    = self->sup_sources; 
  sockets    = self->sup_sockets; 
  waits      = self->sup_waits; 
  wait_cbs   = self->sup_wait_cbs; 
  wait_args  = self->sup_wait_args;
  wait_roots = self->sup_wait_roots; 
  
  rl = CFRunLoopGetCurrent();

  for (i = j = 0; i < N; i++) {
    index = reverses[i]; assert(index > 0 && indices[index] == i);

    if (wait_roots[i] == root) {
      if (i < self->sup_pri_offset)
	self->sup_pri_offset--;