sd_bus_get_current_handler(3) — Справочная страница Linux

SD_BUS_G..._HANDLER(3) sd_bus_get_current_handler SD_BUS_G..._HANDLER(3)

НАЗВАНИЕ

       sd_bus_get_current_handler, sd_bus_get_current_message,
       sd_bus_get_current_slot, sd_bus_get_current_userdata - Query
       information of the callback a bus object is currently running

СИНТАКСИС

       #include <systemd/sd-bus.h>

       typedef int (*sd_bus_message_handler_t)(sd_bus_message *m,
                                               void *userdata,
                                               sd_bus_error *ret_error);

       sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus);

       sd_bus_message* sd_bus_get_current_message(sd_bus *bus);

       sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus);

       void* sd_bus_get_current_userdata(sd_bus *bus);

ОПИСАНИЕ

       Whenever sd-bus is about to invoke a user-supplied callback
       function, it stores the current callback, D-Bus message, slot and
       userdata pointer and allows these to be queried via
       sd_bus_get_current_handler(), sd_bus_get_current_message(),
       sd_bus_get_current_slot() and sd_bus_get_current_userdata(),
       respectively. If bus cannot be resolved or if execution does not
       reside in a user-supplied callback of bus, these functions return
       NULL.

ЗНАЧЕНИЕ ВОЗВРАТА

       On success, these functions return the requested object. On
       failure, they return NULL.

ПРИМЕЧАНИЯ

       Functions described here are available as a shared library, which
       can be compiled against and linked to with the
       libsystemd pkg-config(1) file.

       The code described here uses getenv(3), which is declared to be
       not multi-thread-safe. This means that the code calling the
       functions described here must not call setenv(3) from a parallel
       thread. It is recommended to only do calls to setenv() from an
       early phase of the program when no other threads have been
       started.

ИСТОРИЯ

       sd_bus_get_current_handler(), sd_bus_get_current_message(),
       sd_bus_get_current_slot(), and sd_bus_get_current_userdata() were
       added in version 221.

СМОТРИТЕ ТАКЖЕ

       systemd(1), sd-bus(3)

КОЛОФОН

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
       a bug report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-13.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 257~devel                                 SD_BUS_G..._HANDLER(3)

Страницы, которые ссылаются на эту страницу: sd-bus(3), systemd.directives(7), systemd.index(7)