Signal Handler

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Functions
Signal Handler
Eldbus

## Functions
Eldbus_Signal_Handler * | eldbus_signal_handler_add (Eldbus_Connection *conn, const char *sender, const char *path, const char *interface, const char *member, Eldbus_Signal_Cb cb, const void *cb_data)
| Add a signal handler.
Eldbus_Signal_Handler * | eldbus_signal_handler_ref (Eldbus_Signal_Handler *handler)
| Increase signal handler reference.
void | eldbus_signal_handler_unref (Eldbus_Signal_Handler *handler)
| Decrease signal handler reference.
void | eldbus_signal_handler_del (Eldbus_Signal_Handler *handler)
| Decrease signal handler reference like eldbus_signal_handler_unref() but if reference > 0 this signal handler will stop listening to signals.
Eina_Bool | eldbus_signal_handler_match_extra_set (Eldbus_Signal_Handler *sh,...) EINA_SENTINEL
| Add extra argument in match of signal handler to obtain specifics signals.
Eina_Bool | eldbus_signal_handler_match_extra_vset (Eldbus_Signal_Handler *sh, va_list ap)
| Add extra argument in match of signal handler to obtain specifics signals.
void | eldbus_signal_handler_free_cb_add (Eldbus_Signal_Handler *handler, Eldbus_Free_Cb cb, const void *data)
| Add a callback function to be called when signal handler will be freed.
void | eldbus_signal_handler_free_cb_del (Eldbus_Signal_Handler *handler, Eldbus_Free_Cb cb, const void *data)
| Remove callback registered in eldbus_signal_handler_free_cb_add().
const char * | eldbus_signal_handler_sender_get (const Eldbus_Signal_Handler *handler)
const char * | eldbus_signal_handler_path_get (const Eldbus_Signal_Handler *handler)
const char * | eldbus_signal_handler_interface_get (const Eldbus_Signal_Handler *handler)
const char * | eldbus_signal_handler_member_get (const Eldbus_Signal_Handler *handler)
const char * | eldbus_signal_handler_match_get (const Eldbus_Signal_Handler *handler)
Eldbus_Connection * | eldbus_signal_handler_connection_get (const Eldbus_Signal_Handler *handler)

## Detailed Description

## Function Documentation

## ◆ eldbus_signal_handler_add()

Eldbus_Signal_Handler * eldbus_signal_handler_add | ( | Eldbus_Connection * | conn,
|  | const char * | sender,
|  | const char * | path,
|  | const char * | interface,
|  | const char * | member,
|  | Eldbus_Signal_Cb | cb,
|  | const void * | cb_data
| ) |  |

Add a signal handler.

Parameters

  conn | connection where the signal is emitted
  sender | bus name or unique id of where the signal is emitted
  path | path of remote object
  interface | that signal belongs
  member | name of the signal
  cb | callback that will be called when this signal is received
  cb_data | data that will be passed to callback

Returns
  signal handler

References EINA_SAFETY_ON_NULL_RETURN_VAL, eldbus_connection_free_cb_add(), and eldbus_signal_handler_free_cb_add().

## ◆ eldbus_signal_handler_ref()

Eldbus_Signal_Handler * eldbus_signal_handler_ref | ( | Eldbus_Signal_Handler * | handler | ) |

Increase signal handler reference.

Parameters

  handler | signal handler

Returns
  the same signal handler, `handler`

References eina_strbuf_string_get().

## ◆ eldbus_signal_handler_unref()

void eldbus_signal_handler_unref | ( | Eldbus_Signal_Handler * | handler | ) |

Decrease signal handler reference.

If reference == 0 signal handler will be freed.

Parameters

  handler | signal handler

References eina_strbuf_string_get().

Referenced by eldbus_proxy_event_callback_del(), eldbus_proxy_properties_monitor(), and eldbus_signal_handler_del().

## ◆ eldbus_signal_handler_del()

void eldbus_signal_handler_del | ( | Eldbus_Signal_Handler * | handler | ) |

Decrease signal handler reference like eldbus_signal_handler_unref() but if reference > 0 this signal handler will stop listening to signals.

In other words it will be canceled but memory will not be freed.

Parameters

  handler | signal handler to delete

References eldbus_signal_handler_unref().

Referenced by eldbus_object_event_callback_del().

## ◆ eldbus_signal_handler_match_extra_set()

Eina_Bool eldbus_signal_handler_match_extra_set | ( | Eldbus_Signal_Handler * | sh,
|  |  | ...
| ) |  |

Add extra argument in match of signal handler to obtain specifics signals.

Example: eldbus_signal_handler_match_extra_set(sh, "arg0", "org.bansheeproject.Banshee", "arg1", "", NULL); With this extra arguments this signal handler callback only will be called when Banshee is started.

Note
  For now only argX is supported.

Parameters

  sh | signal handler
  ... | variadic of key and value and must be ended with a NULL

Returns
  EINA_TRUE if success

Note
  For more information: http://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-routing-match-rules

References eldbus_signal_handler_match_extra_vset().

Referenced by eldbus_object_event_callback_add(), and eldbus_proxy_properties_changed_callback_add().

## ◆ eldbus_signal_handler_match_extra_vset()

Eina_Bool eldbus_signal_handler_match_extra_vset | ( | Eldbus_Signal_Handler * | sh,
|  | va_list | ap
| ) |  |

Add extra argument in match of signal handler to obtain specifics signals.

Example: eldbus_signal_handler_match_extra_set(sh, "arg0", "org.bansheeproject.Banshee", "arg1", "", NULL); With this extra arguments this signal handler callback only will be called when Banshee is started.

Note
  For now is only supported argX.

Parameters

  sh | signal handler
  ap | va_list with the keys and values, must be ended with a NULL

Returns
  EINA_TRUE if success

Note
  To information: http://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-routing-match-rules

References EINA_FALSE, EINA_INLIST_GET, eina_inlist_sorted_state_insert(), EINA_SAFETY_ON_NULL_GOTO, eina_strbuf_string_get(), eina_stringshare_add(), and EINA_TRUE.

Referenced by eldbus_signal_handler_match_extra_set().

## ◆ eldbus_signal_handler_free_cb_add()

void eldbus_signal_handler_free_cb_add | ( | Eldbus_Signal_Handler * | handler,
|  | Eldbus_Free_Cb | cb,
|  | const void * | data
| ) |  |

Add a callback function to be called when signal handler will be freed.

Parameters

  handler | signal handler
  cb | callback that will be called when this signal handler is freed
  data | data that will be passed to callback

References EINA_SAFETY_ON_NULL_RETURN.

Referenced by eldbus_object_signal_handler_add(), eldbus_proxy_signal_handler_add(), and eldbus_signal_handler_add().

## ◆ eldbus_signal_handler_free_cb_del()

void eldbus_signal_handler_free_cb_del | ( | Eldbus_Signal_Handler * | handler,
|  | Eldbus_Free_Cb | cb,
|  | const void * | data
| ) |  |

Remove callback registered in eldbus_signal_handler_free_cb_add().

Parameters

  handler | signal handler
  cb | registered callback to remove
  data | data that will be passed to callback

References EINA_SAFETY_ON_NULL_RETURN.