-/* -*- mode: C; c-file-style: "gnu" -*- */
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* dbus-pending-call.c Object representing a call in progress.
*
* Copyright (C) 2002, 2003 Red Hat Inc.
*
- * Licensed under the Academic Free License version 1.2
+ * Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+#include <config.h>
#include "dbus-internals.h"
#include "dbus-connection-internal.h"
+#include "dbus-pending-call-internal.h"
#include "dbus-pending-call.h"
#include "dbus-list.h"
#include "dbus-threads.h"
*/
/**
+ * @brief Internals of DBusPendingCall
+ *
+ * Opaque object representing a reply message that we're waiting for.
+ */
+
+/**
+ * shorter and more visible way to write _dbus_connection_lock()
+ */
+#define CONNECTION_LOCK(connection) _dbus_connection_lock(connection)
+/**
+ * shorter and more visible way to write _dbus_connection_unlock()
+ */
+#define CONNECTION_UNLOCK(connection) _dbus_connection_unlock(connection)
+
+/**
+ * Implementation details of #DBusPendingCall - all fields are private.
+ */
+struct DBusPendingCall
+{
+ DBusAtomic refcount; /**< reference count */
+
+ DBusDataSlotList slot_list; /**< Data stored by allocated integer ID */
+
+ DBusPendingCallNotifyFunction function; /**< Notifier when reply arrives. */
+
+ DBusConnection *connection; /**< Connections we're associated with */
+ DBusMessage *reply; /**< Reply (after we've received it) */
+ DBusTimeout *timeout; /**< Timeout */
+
+ DBusList *timeout_link; /**< Preallocated timeout response */
+
+ dbus_uint32_t reply_serial; /**< Expected serial of reply */
+
+ unsigned int completed : 1; /**< TRUE if completed */
+ unsigned int timeout_added : 1; /**< Have added the timeout */
+};
+
+static dbus_int32_t notify_user_data_slot = -1;
+
+/**
* Creates a new pending reply object.
*
* @param connection connection where reply will arrive
- * @param timeout_milliseconds length of timeout, -1 for default
+ * @param timeout_milliseconds length of timeout, -1 (or
+ * #DBUS_TIMEOUT_USE_DEFAULT) for default,
+ * #DBUS_TIMEOUT_INFINITE for no timeout
* @param timeout_handler timeout handler, takes pending call as data
* @returns a new #DBusPendingCall or #NULL if no memory.
*/
DBusPendingCall*
-_dbus_pending_call_new (DBusConnection *connection,
- int timeout_milliseconds,
- DBusTimeoutHandler timeout_handler)
+_dbus_pending_call_new_unlocked (DBusConnection *connection,
+ int timeout_milliseconds,
+ DBusTimeoutHandler timeout_handler)
{
DBusPendingCall *pending;
DBusTimeout *timeout;
- _dbus_return_val_if_fail (timeout_milliseconds >= 0 || timeout_milliseconds == -1, FALSE);
-
+ _dbus_assert (timeout_milliseconds >= 0 || timeout_milliseconds == -1);
+
if (timeout_milliseconds == -1)
timeout_milliseconds = _DBUS_DEFAULT_TIMEOUT_VALUE;
+
+ if (!dbus_pending_call_allocate_data_slot (¬ify_user_data_slot))
+ return NULL;
- pending = dbus_new (DBusPendingCall, 1);
+ pending = dbus_new0 (DBusPendingCall, 1);
if (pending == NULL)
- return NULL;
+ {
+ dbus_pending_call_free_data_slot (¬ify_user_data_slot);
+ return NULL;
+ }
- timeout = _dbus_timeout_new (timeout_milliseconds,
- timeout_handler,
- pending, NULL);
+ if (timeout_milliseconds != DBUS_TIMEOUT_INFINITE)
+ {
+ timeout = _dbus_timeout_new (timeout_milliseconds,
+ timeout_handler,
+ pending, NULL);
- if (timeout == NULL)
+ if (timeout == NULL)
+ {
+ dbus_pending_call_free_data_slot (¬ify_user_data_slot);
+ dbus_free (pending);
+ return NULL;
+ }
+
+ pending->timeout = timeout;
+ }
+ else
{
- dbus_free (pending);
- return NULL;
+ pending->timeout = NULL;
}
-
- pending->refcount.value = 1;
+
+ _dbus_atomic_inc (&pending->refcount);
pending->connection = connection;
- pending->timeout = timeout;
+ _dbus_connection_ref_unlocked (pending->connection);
+
+ _dbus_data_slot_list_init (&pending->slot_list);
return pending;
}
/**
+ * Sets the reply of a pending call with the given message,
+ * or if the message is #NULL, by timing out the pending call.
+ *
+ * @param pending the pending call
+ * @param message the message to complete the call with, or #NULL
+ * to time out the call
+ */
+void
+_dbus_pending_call_set_reply_unlocked (DBusPendingCall *pending,
+ DBusMessage *message)
+{
+ if (message == NULL)
+ {
+ message = pending->timeout_link->data;
+ _dbus_list_clear (&pending->timeout_link);
+ }
+ else
+ dbus_message_ref (message);
+
+ _dbus_verbose (" handing message %p (%s) to pending call serial %u\n",
+ message,
+ dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_METHOD_RETURN ?
+ "method return" :
+ dbus_message_get_type (message) == DBUS_MESSAGE_TYPE_ERROR ?
+ "error" : "other type",
+ pending->reply_serial);
+
+ _dbus_assert (pending->reply == NULL);
+ _dbus_assert (pending->reply_serial == dbus_message_get_reply_serial (message));
+ pending->reply = message;
+}
+
+/**
* Calls notifier function for the pending call
* and sets the call to completed.
*
*
*/
void
-_dbus_pending_call_notify (DBusPendingCall *pending)
+_dbus_pending_call_complete (DBusPendingCall *pending)
{
+ _dbus_assert (!pending->completed);
+
pending->completed = TRUE;
if (pending->function)
- (* pending->function) (pending, pending->user_data);
+ {
+ void *user_data;
+ user_data = dbus_pending_call_get_data (pending,
+ notify_user_data_slot);
+
+ (* pending->function) (pending, user_data);
+ }
+}
+
+/**
+ * If the pending call hasn't been timed out, add its timeout
+ * error reply to the connection's incoming message queue.
+ *
+ * @param pending the pending call
+ * @param connection the connection the call was sent to
+ */
+void
+_dbus_pending_call_queue_timeout_error_unlocked (DBusPendingCall *pending,
+ DBusConnection *connection)
+{
+ _dbus_assert (connection == pending->connection);
+
+ if (pending->timeout_link)
+ {
+ _dbus_connection_queue_synthesized_message_link (connection,
+ pending->timeout_link);
+ pending->timeout_link = NULL;
+ }
+}
+
+/**
+ * Checks to see if a timeout has been added
+ *
+ * @param pending the pending_call
+ * @returns #TRUE if there is a timeout or #FALSE if not
+ */
+dbus_bool_t
+_dbus_pending_call_is_timeout_added_unlocked (DBusPendingCall *pending)
+{
+ _dbus_assert (pending != NULL);
+
+ return pending->timeout_added;
+}
+
+
+/**
+ * Sets wether the timeout has been added
+ *
+ * @param pending the pending_call
+ * @param is_added whether or not a timeout is added
+ */
+void
+_dbus_pending_call_set_timeout_added_unlocked (DBusPendingCall *pending,
+ dbus_bool_t is_added)
+{
+ _dbus_assert (pending != NULL);
+
+ pending->timeout_added = is_added;
+}
+
+
+/**
+ * Retrives the timeout
+ *
+ * @param pending the pending_call
+ * @returns a timeout object or NULL if call has no timeout
+ */
+DBusTimeout *
+_dbus_pending_call_get_timeout_unlocked (DBusPendingCall *pending)
+{
+ _dbus_assert (pending != NULL);
+
+ return pending->timeout;
+}
+
+/**
+ * Gets the reply's serial number
+ *
+ * @param pending the pending_call
+ * @returns a serial number for the reply or 0
+ */
+dbus_uint32_t
+_dbus_pending_call_get_reply_serial_unlocked (DBusPendingCall *pending)
+{
+ _dbus_assert (pending != NULL);
+
+ return pending->reply_serial;
+}
+
+/**
+ * Sets the reply's serial number
+ *
+ * @param pending the pending_call
+ * @param serial the serial number
+ */
+void
+_dbus_pending_call_set_reply_serial_unlocked (DBusPendingCall *pending,
+ dbus_uint32_t serial)
+{
+ _dbus_assert (pending != NULL);
+ _dbus_assert (pending->reply_serial == 0);
+
+ pending->reply_serial = serial;
+}
+
+/**
+ * Gets the connection associated with this pending call.
+ *
+ * @param pending the pending_call
+ * @returns the connection associated with the pending call
+ */
+DBusConnection *
+_dbus_pending_call_get_connection_and_lock (DBusPendingCall *pending)
+{
+ _dbus_assert (pending != NULL);
+
+ CONNECTION_LOCK (pending->connection);
+ return pending->connection;
+}
+
+/**
+ * Gets the connection associated with this pending call.
+ *
+ * @param pending the pending_call
+ * @returns the connection associated with the pending call
+ */
+DBusConnection *
+_dbus_pending_call_get_connection_unlocked (DBusPendingCall *pending)
+{
+ _dbus_assert (pending != NULL);
+
+ return pending->connection;
+}
+
+/**
+ * Sets the reply message associated with the pending call to a timeout error
+ *
+ * @param pending the pending_call
+ * @param message the message we are sending the error reply to
+ * @param serial serial number for the reply
+ * @return #FALSE on OOM
+ */
+dbus_bool_t
+_dbus_pending_call_set_timeout_error_unlocked (DBusPendingCall *pending,
+ DBusMessage *message,
+ dbus_uint32_t serial)
+{
+ DBusList *reply_link;
+ DBusMessage *reply;
+
+ reply = dbus_message_new_error (message, DBUS_ERROR_NO_REPLY,
+ "Did not receive a reply. Possible causes include: "
+ "the remote application did not send a reply, "
+ "the message bus security policy blocked the reply, "
+ "the reply timeout expired, or "
+ "the network connection was broken.");
+ if (reply == NULL)
+ return FALSE;
+
+ reply_link = _dbus_list_alloc_link (reply);
+ if (reply_link == NULL)
+ {
+ /* it's OK to unref this, nothing that could have attached a callback
+ * has ever seen it */
+ dbus_message_unref (reply);
+ return FALSE;
+ }
+
+ pending->timeout_link = reply_link;
+
+ _dbus_pending_call_set_reply_serial_unlocked (pending, serial);
+
+ return TRUE;
+}
+
+/**
+ * Increments the reference count on a pending call,
+ * while the lock on its connection is already held.
+ *
+ * @param pending the pending call object
+ * @returns the pending call object
+ */
+DBusPendingCall *
+_dbus_pending_call_ref_unlocked (DBusPendingCall *pending)
+{
+ _dbus_atomic_inc (&pending->refcount);
+
+ return pending;
+}
+
+
+static void
+_dbus_pending_call_last_unref (DBusPendingCall *pending)
+{
+ DBusConnection *connection;
+
+ /* If we get here, we should be already detached
+ * from the connection, or never attached.
+ */
+ _dbus_assert (!pending->timeout_added);
+
+ connection = pending->connection;
+
+ /* this assumes we aren't holding connection lock... */
+ _dbus_data_slot_list_free (&pending->slot_list);
+
+ if (pending->timeout != NULL)
+ _dbus_timeout_unref (pending->timeout);
+
+ if (pending->timeout_link)
+ {
+ dbus_message_unref ((DBusMessage *)pending->timeout_link->data);
+ _dbus_list_free_link (pending->timeout_link);
+ pending->timeout_link = NULL;
+ }
+
+ if (pending->reply)
+ {
+ dbus_message_unref (pending->reply);
+ pending->reply = NULL;
+ }
+
+ dbus_free (pending);
+
+ dbus_pending_call_free_data_slot (¬ify_user_data_slot);
+
+ /* connection lock should not be held. */
+ /* Free the connection last to avoid a weird state while
+ * calling out to application code where the pending exists
+ * but not the connection.
+ */
+ dbus_connection_unref (connection);
+}
+
+/**
+ * Decrements the reference count on a pending call,
+ * freeing it if the count reaches 0. Assumes
+ * connection lock is already held.
+ *
+ * @param pending the pending call object
+ */
+void
+_dbus_pending_call_unref_and_unlock (DBusPendingCall *pending)
+{
+ dbus_int32_t old_refcount;
+
+ old_refcount = _dbus_atomic_dec (&pending->refcount);
+ _dbus_assert (old_refcount > 0);
+
+ CONNECTION_UNLOCK (pending->connection);
+
+ if (old_refcount == 1)
+ _dbus_pending_call_last_unref (pending);
+}
+
+/**
+ * Checks whether the pending call has received a reply
+ * yet, or not. Assumes connection lock is held.
+ *
+ * @param pending the pending call
+ * @returns #TRUE if a reply has been received
+ */
+dbus_bool_t
+_dbus_pending_call_get_completed_unlocked (DBusPendingCall *pending)
+{
+ return pending->completed;
+}
+
+static DBusDataSlotAllocator slot_allocator;
+_DBUS_DEFINE_GLOBAL_LOCK (pending_call_slots);
+
+/**
+ * Stores a pointer on a #DBusPendingCall, along
+ * with an optional function to be used for freeing
+ * the data when the data is set again, or when
+ * the pending call is finalized. The slot number
+ * must have been allocated with dbus_pending_call_allocate_data_slot().
+ *
+ * @param pending the pending_call
+ * @param slot the slot number
+ * @param data the data to store
+ * @param free_data_func finalizer function for the data
+ * @returns #TRUE if there was enough memory to store the data
+ */
+dbus_bool_t
+_dbus_pending_call_set_data_unlocked (DBusPendingCall *pending,
+ dbus_int32_t slot,
+ void *data,
+ DBusFreeFunction free_data_func)
+{
+ DBusFreeFunction old_free_func;
+ void *old_data;
+ dbus_bool_t retval;
+
+ retval = _dbus_data_slot_list_set (&slot_allocator,
+ &pending->slot_list,
+ slot, data, free_data_func,
+ &old_free_func, &old_data);
+
+ /* Drop locks to call out to app code */
+ CONNECTION_UNLOCK (pending->connection);
+
+ if (retval)
+ {
+ if (old_free_func)
+ (* old_free_func) (old_data);
+ }
+
+ CONNECTION_LOCK (pending->connection);
+
+ return retval;
}
/** @} */
*/
/**
+ * @def DBUS_TIMEOUT_INFINITE
+ *
+ * An integer constant representing an infinite timeout. This has the
+ * numeric value 0x7fffffff (the largest 32-bit signed integer).
+ *
+ * For source compatibility with D-Bus versions earlier than 1.4.12, use
+ * 0x7fffffff, or INT32_MAX (assuming your platform has it).
+ */
+
+/**
+ * @def DBUS_TIMEOUT_USE_DEFAULT
+ *
+ * An integer constant representing a request to use the default timeout.
+ * This has numeric value -1.
+ *
+ * For source compatibility with D-Bus versions earlier than 1.4.12, use a
+ * literal -1.
+ */
+
+/**
* @typedef DBusPendingCall
*
* Opaque data type representing a message pending.
* Increments the reference count on a pending call.
*
* @param pending the pending call object
+ * @returns the pending call object
*/
-void
+DBusPendingCall *
dbus_pending_call_ref (DBusPendingCall *pending)
{
- _dbus_return_if_fail (pending != NULL);
+ _dbus_return_val_if_fail (pending != NULL, NULL);
_dbus_atomic_inc (&pending->refcount);
+
+ return pending;
}
/**
last_unref = (_dbus_atomic_dec (&pending->refcount) == 1);
if (last_unref)
- {
- /* If we get here, we should be already detached
- * from the connection, or never attached.
- */
- _dbus_assert (pending->connection == NULL);
- _dbus_assert (!pending->timeout_added);
-
- /* this assumes we aren't holding connection lock... */
- if (pending->free_user_data)
- (* pending->free_user_data) (pending->user_data);
-
- if (pending->timeout != NULL)
- _dbus_timeout_unref (pending->timeout);
-
- if (pending->timeout_link)
- {
- dbus_message_unref ((DBusMessage *)pending->timeout_link->data);
- _dbus_list_free_link (pending->timeout_link);
- pending->timeout_link = NULL;
- }
-
- if (pending->reply)
- {
- dbus_message_unref (pending->reply);
- pending->reply = NULL;
- }
-
- dbus_free (pending);
- }
+ _dbus_pending_call_last_unref(pending);
}
/**
* @param function notifier function
* @param user_data data to pass to notifier function
* @param free_user_data function to free the user data
- *
+ * @returns #FALSE if not enough memory
*/
-void
+dbus_bool_t
dbus_pending_call_set_notify (DBusPendingCall *pending,
DBusPendingCallNotifyFunction function,
void *user_data,
DBusFreeFunction free_user_data)
{
- DBusFreeFunction old_free_func;
- void *old_user_data;
-
- _dbus_return_if_fail (pending != NULL);
+ _dbus_return_val_if_fail (pending != NULL, FALSE);
- old_free_func = pending->free_user_data;
- old_user_data = pending->user_data;
-
- pending->user_data = user_data;
- pending->free_user_data = free_user_data;
+ CONNECTION_LOCK (pending->connection);
+
+ /* could invoke application code! */
+ if (!_dbus_pending_call_set_data_unlocked (pending, notify_user_data_slot,
+ user_data, free_user_data))
+ return FALSE;
+
pending->function = function;
- if (old_free_func)
- (* old_free_func) (old_user_data);
+ CONNECTION_UNLOCK (pending->connection);
+
+ return TRUE;
}
/**
- * Cancels the pending call, such that any reply
- * or error received will just be ignored.
- * Drops at least one reference to the #DBusPendingCall
- * so will free the call if nobody else is holding
- * a reference.
+ * Cancels the pending call, such that any reply or error received
+ * will just be ignored. Drops the dbus library's internal reference
+ * to the #DBusPendingCall so will free the call if nobody else is
+ * holding a reference. However you usually get a reference from
+ * dbus_connection_send_with_reply() so probably your app owns a ref
+ * also.
+ *
+ * Note that canceling a pending call will <em>not</em> simulate a
+ * timed-out call; if a call times out, then a timeout error reply is
+ * received. If you cancel the call, no reply is received unless the
+ * the reply was already received before you canceled.
*
* @param pending the pending call
*/
void
dbus_pending_call_cancel (DBusPendingCall *pending)
{
- if (pending->connection)
- _dbus_connection_remove_pending_call (pending->connection,
- pending);
+ _dbus_return_if_fail (pending != NULL);
+
+ _dbus_connection_remove_pending_call (pending->connection,
+ pending);
}
/**
dbus_bool_t
dbus_pending_call_get_completed (DBusPendingCall *pending)
{
- return pending->completed;
+ dbus_bool_t completed;
+
+ _dbus_return_val_if_fail (pending != NULL, FALSE);
+
+ CONNECTION_LOCK (pending->connection);
+ completed = pending->completed;
+ CONNECTION_UNLOCK (pending->connection);
+
+ return completed;
}
/**
- * Gets the reply, or returns #NULL if none has been received yet. The
- * reference count is not incremented on the returned message, so you
- * have to keep a reference count on the pending call (or add one
- * to the message).
- *
+ * Gets the reply, or returns #NULL if none has been received
+ * yet. Ownership of the reply message passes to the caller. This
+ * function can only be called once per pending call, since the reply
+ * message is tranferred to the caller.
+ *
* @param pending the pending call
* @returns the reply message or #NULL.
*/
DBusMessage*
-dbus_pending_call_get_reply (DBusPendingCall *pending)
+dbus_pending_call_steal_reply (DBusPendingCall *pending)
+{
+ DBusMessage *message;
+
+ _dbus_return_val_if_fail (pending != NULL, NULL);
+ _dbus_return_val_if_fail (pending->completed, NULL);
+ _dbus_return_val_if_fail (pending->reply != NULL, NULL);
+
+ CONNECTION_LOCK (pending->connection);
+
+ message = pending->reply;
+ pending->reply = NULL;
+
+ CONNECTION_UNLOCK (pending->connection);
+
+ return message;
+}
+
+/**
+ * Block until the pending call is completed. The blocking is as with
+ * dbus_connection_send_with_reply_and_block(); it does not enter the
+ * main loop or process other messages, it simply waits for the reply
+ * in question.
+ *
+ * If the pending call is already completed, this function returns
+ * immediately.
+ *
+ * @todo when you start blocking, the timeout is reset, but it should
+ * really only use time remaining since the pending call was created.
+ * This requires storing timestamps instead of intervals in the timeout
+ *
+ * @param pending the pending call
+ */
+void
+dbus_pending_call_block (DBusPendingCall *pending)
+{
+ _dbus_return_if_fail (pending != NULL);
+
+ _dbus_connection_block_pending_call (pending);
+}
+
+/**
+ * Allocates an integer ID to be used for storing application-specific
+ * data on any DBusPendingCall. The allocated ID may then be used
+ * with dbus_pending_call_set_data() and dbus_pending_call_get_data().
+ * The passed-in slot must be initialized to -1, and is filled in
+ * with the slot ID. If the passed-in slot is not -1, it's assumed
+ * to be already allocated, and its refcount is incremented.
+ *
+ * The allocated slot is global, i.e. all DBusPendingCall objects will
+ * have a slot with the given integer ID reserved.
+ *
+ * @param slot_p address of a global variable storing the slot
+ * @returns #FALSE on failure (no memory)
+ */
+dbus_bool_t
+dbus_pending_call_allocate_data_slot (dbus_int32_t *slot_p)
+{
+ _dbus_return_val_if_fail (slot_p != NULL, FALSE);
+
+ return _dbus_data_slot_allocator_alloc (&slot_allocator,
+ &_DBUS_LOCK_NAME (pending_call_slots),
+ slot_p);
+}
+
+/**
+ * Deallocates a global ID for #DBusPendingCall data slots.
+ * dbus_pending_call_get_data() and dbus_pending_call_set_data() may
+ * no longer be used with this slot. Existing data stored on existing
+ * DBusPendingCall objects will be freed when the #DBusPendingCall is
+ * finalized, but may not be retrieved (and may only be replaced if
+ * someone else reallocates the slot). When the refcount on the
+ * passed-in slot reaches 0, it is set to -1.
+ *
+ * @param slot_p address storing the slot to deallocate
+ */
+void
+dbus_pending_call_free_data_slot (dbus_int32_t *slot_p)
+{
+ _dbus_return_if_fail (slot_p != NULL);
+ _dbus_return_if_fail (*slot_p >= 0);
+
+ _dbus_data_slot_allocator_free (&slot_allocator, slot_p);
+}
+
+/**
+ * Stores a pointer on a #DBusPendingCall, along
+ * with an optional function to be used for freeing
+ * the data when the data is set again, or when
+ * the pending call is finalized. The slot number
+ * must have been allocated with dbus_pending_call_allocate_data_slot().
+ *
+ * @param pending the pending_call
+ * @param slot the slot number
+ * @param data the data to store
+ * @param free_data_func finalizer function for the data
+ * @returns #TRUE if there was enough memory to store the data
+ */
+dbus_bool_t
+dbus_pending_call_set_data (DBusPendingCall *pending,
+ dbus_int32_t slot,
+ void *data,
+ DBusFreeFunction free_data_func)
+{
+ dbus_bool_t retval;
+
+ _dbus_return_val_if_fail (pending != NULL, FALSE);
+ _dbus_return_val_if_fail (slot >= 0, FALSE);
+
+
+ CONNECTION_LOCK (pending->connection);
+ retval = _dbus_pending_call_set_data_unlocked (pending, slot, data, free_data_func);
+ CONNECTION_UNLOCK (pending->connection);
+ return retval;
+}
+
+/**
+ * Retrieves data previously set with dbus_pending_call_set_data().
+ * The slot must still be allocated (must not have been freed).
+ *
+ * @param pending the pending_call
+ * @param slot the slot to get data from
+ * @returns the data, or #NULL if not found
+ */
+void*
+dbus_pending_call_get_data (DBusPendingCall *pending,
+ dbus_int32_t slot)
{
- return pending->reply;
+ void *res;
+
+ _dbus_return_val_if_fail (pending != NULL, NULL);
+
+ CONNECTION_LOCK (pending->connection);
+ res = _dbus_data_slot_list_get (&slot_allocator,
+ &pending->slot_list,
+ slot);
+ CONNECTION_UNLOCK (pending->connection);
+
+ return res;
}
/** @} */