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destroy all signals that the finalized obejct type introduced.

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Wed Nov  1 03:36:54 2000  Tim Janik  <timj@gtk.org>

        * gobject.c (g_object_base_class_finalize): destroy all signals that
        the finalized obejct type introduced.

        * gsignal.c (g_signals_destroy): don't require itype to have
        signals.

        * gobject.c (g_object_do_finalize): make sure all signal handlers
        are destroyed.

        * gsignal.[hc]:
        (g_signal_handler_find): only match on non-0 masks.
        (g_signal_handlers_block_matched):
        (g_signal_handlers_unblock_matched):
        (g_signal_handlers_disconnect_matched): new functions to block/unblock
        or disconnect handlers in groups.
This commit is contained in:
Tim Janik
2000-11-01 03:03:04 +00:00
committed by Tim Janik
parent b6eb9a2e7d
commit cfe0780d3e
6 changed files with 430 additions and 179 deletions
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186
docs/reference/gobject/tmpl/signals.sgml
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@@ -76,9 +76,9 @@ The @GSignalInvocationHint structure is used to pass on additional information
to callbacks during a signal emission.
</para>
@signal_id: The signal id of the signal invoking the callback
@detail: The detail passed on for this emission
@run_type: The stage the signal emission is currently in, this
@signal_id: The signal id of the signal invoking the callback
@detail: The detail passed on for this emission
@run_type: The stage the signal emission is currently in, this
field will contain one of @G_SIGNAL_RUN_FIRST,
@G_SIGNAL_RUN_LAST or @G_SIGNAL_RUN_CLEANUP.
@@ -92,11 +92,11 @@ values is perfomed. The return value of signal emissions is then the
value returned by the last callback.
</para>
@ihint: Signal invokation hint, see @GSignalInvocationHint
@return_accu: Accumulator to collect callback return values in, this
@ihint: Signal invokation hint, see @GSignalInvocationHint
@return_accu: Accumulator to collect callback return values in, this
is the return value of the current signal emission
@return_value: The return value of the most recent callback function
@Returns: The accumulator function returns whether the signal emission
@return_value: The return value of the most recent callback function
@Returns: The accumulator function returns whether the signal emission
should be aborted. Returning @FALSE means to abort the
current emission and @TRUE is returned for continuation.
@@ -153,14 +153,14 @@ A structure holding in-depth information for a specific signal. It is
filled in by the g_signal_query() function.
</para>
@signal_id: The signal id of the signal being querried, or 0 if the
@signal_id: The signal id of the signal being querried, or 0 if the
signal to be querried was unknown
@signal_name: The signal name
@itype: The interface/instance type that this signal can be emitted for
@signal_flags: The signal flags as passed in to @g_signal_new()
@return_type: The return type for user callbacks
@n_params: The number of parameters that user callbacks take
@param_types: The individual parameter types for user callbacks, note that the
@signal_name: The signal name
@itype: The interface/instance type that this signal can be emitted for
@signal_flags: The signal flags as passed in to @g_signal_new()
@return_type: The return type for user callbacks
@n_params: The number of parameters that user callbacks take
@param_types: The individual parameter types for user callbacks, note that the
effective callback signature is:
<msgtext><programlisting>
@return_type callback (@gpointer data1,
@@ -225,8 +225,8 @@ is 0. All members filled into the @GSignalQuery structure should
be considered constant and have to be left untouched.
</para>
@signal_id: The signal id of the signal to query information for
@query: A user provided structure that is filled in with constant
@signal_id: The signal id of the signal to query information for
@query: A user provided structure that is filled in with constant
values upon success.
@@ -237,9 +237,9 @@ created. Further information about the signals can be aquired through
g_signal_query().
</para>
@itype: Instance or interface type
@n_ids: Location to store the number of signal ids for @itype
@Returns: Newly allocated array of signal ids
@itype: Instance or interface type
@n_ids: Location to store the number of signal ids for @itype
@Returns: Newly allocated array of signal ids
<!-- ##### FUNCTION g_signal_connect_closure ##### -->
@@ -255,46 +255,144 @@ g_signal_query().
@Returns:
<!-- ##### FUNCTION g_signal_handler_find ##### -->
<para>
</para>
@instance:
@mask:
@signal_id:
@detail:
@closure:
@func:
@data:
@Returns:
<!-- ##### FUNCTION g_signal_handler_block ##### -->
<para>
g_signal_handler_block() blocks a handler of an
instance so it will not be called during any signal emissions
unless it is unblocked again. Thus "blocking" a signal handler
means to temporarily deactive it, a signal handler has to be
unblocked exactly the same amount of times it has been blocked
before to become active again.
The @handler_id passed into g_signal_handler_block() has
to be a valid signal handler id, connected to a signal of
@instance.
</para>
@instance:
@handler_id:
@instance: The instance to block the signal handler of
@handler_id: Handler id of the handler to be blocked
<!-- ##### FUNCTION g_signal_handler_unblock ##### -->
<para>
g_signal_handler_unblock() undoes the effect of a previous
g_signal_handler_block() call. A blocked handler is skipped
during signal emissions and will not be invoked, unblocking
it (for exactly the amount of times it has been blocked before)
reverts its "blocked" state, so the handler will be recognized
by the signal system and is called upon future or currently
ongoing signal emissions (since the order in which handlers are
called during signal emissions is deterministic, whether the
unblocked handler in question is called as part of a currently
ongoing emission depends on how far that emission has proceeded
yet).
The @handler_id passed into g_signal_handler_unblock() has
to be a valid id of a signal handler that is connected to a
signal of @instance and is currently blocked.
</para>
@instance:
@handler_id:
@instance: The instance to unblock the signal handler of
@handler_id: Handler id of the handler to be unblocked
<!-- ##### FUNCTION g_signal_handler_disconnect ##### -->
<para>
g_signal_handler_disconnect() disconnects a handler from an
instance so it will not be called during any future or currently
ongoing emissions of the signal it has been connected to.
The @handler_id becomes invalid and may be reused.
The @handler_id passed into g_signal_handler_disconnect() has
to be a valid signal handler id, connected to a signal of
@instance.
</para>
@instance:
@handler_id:
@instance: The instance to remove the signal handler from
@handler_id: Handler id of the handler to be disconnected
<!-- ##### FUNCTION g_signal_handler_find ##### -->
<para>
Find the first signal handler that matches certain selection criteria.
The criteria mask is passed as an OR-ed combination of #GSignalMatchType
flags, and the criteria values are passed as arguments.
The match @mask has to be non-0 for successfull matches.
If no handler was found, 0 is returned.
</para>
@instance: The instance owning the signal handler to be found
@mask: Mask indicating which of @signal_id, @detail,
@closure, @func and/or @data the handler has to match
@signal_id: Signal the handler has to be connected to
@detail: Signal detail the handler has to be connected to
@closure: The closure the handler will invoke
@func: The C closure callback of the handler (useless for non-C closures)
@data: The closure data of the handler's closure
@Returns: A valid non-0 signal handler id for a successfull match
<!-- ##### FUNCTION g_signal_handlers_block_matched ##### -->
<para>
This function blocks all handlers on an instance that match a certain
selection criteria. The criteria mask is passed as an OR-ed combination of
#GSignalMatchType flags, and the criteria values are passed as arguments.
Passing at least one of the %G_SIGNAL_MATCH_CLOSURE, %G_SIGNAL_MATCH_FUNC
or %G_SIGNAL_MATCH_DATA match flags is required for successfull matches.
If no handlers were found, 0 is returned, the number of blocked handlers
otherwise.
</para>
@instance: The instance to block handlers from
@mask: Mask indicating which of @signal_id, @detail,
@closure, @func and/or @data the handlers have to match
@signal_id: Signal the handlers have to be connected to
@detail: Signal detail the handlers have to be connected to
@closure: The closure the handlers will invoke
@func: The C closure callback of the handlers (useless for non-C closures)
@data: The closure data of the handlers' closures
@Returns: The amount of handlers that got blocked
<!-- ##### FUNCTION g_signal_handlers_unblock_matched ##### -->
<para>
This function unblocks all handlers on an instance that match a certain
selection criteria. The criteria mask is passed as an OR-ed combination of
#GSignalMatchType flags, and the criteria values are passed as arguments.
Passing at least one of the %G_SIGNAL_MATCH_CLOSURE, %G_SIGNAL_MATCH_FUNC
or %G_SIGNAL_MATCH_DATA match flags is required for successfull matches.
If no handlers were found, 0 is returned, the number of unblocked handlers
otherwise. The match criteria should not apply to any handlers that are
not currently blocked.
</para>
@instance: The instance to unblock handlers from
@mask: Mask indicating which of @signal_id, @detail,
@closure, @func and/or @data the handlers have to match
@signal_id: Signal the handlers have to be connected to
@detail: Signal detail the handlers have to be connected to
@closure: The closure the handlers will invoke
@func: The C closure callback of the handlers (useless for non-C closures)
@data: The closure data of the handlers' closures
@Returns: The amount of handlers that got unblocked
<!-- ##### FUNCTION g_signal_handlers_disconnect_matched ##### -->
<para>
This function disconnects all handlers on an instance that match a certain
selection criteria. The criteria mask is passed as an OR-ed combination of
#GSignalMatchType flags, and the criteria values are passed as arguments.
Passing at least one of the %G_SIGNAL_MATCH_CLOSURE, %G_SIGNAL_MATCH_FUNC
or %G_SIGNAL_MATCH_DATA match flags is required for successfull matches.
If no handlers were found, 0 is returned, the number of disconnected handlers
otherwise.
</para>
@instance: The instance to remove handlers from
@mask: Mask indicating which of @signal_id, @detail,
@closure, @func and/or @data the handlers have to match
@signal_id: Signal the handlers have to be connected to
@detail: Signal detail the handlers have to be connected to
@closure: The closure the handlers will invoke
@func: The C closure callback of the handlers (useless for non-C closures)
@data: The closure data of the handlers' closures
@Returns: The amount of handlers that got disconnected
<!-- ##### FUNCTION g_signal_has_handler_pending ##### -->