sd_bus_pending_method

Name

sd_bus_pending_method_calls — Return the number of currently pending, outgoing method calls

Synopsis

#include <systemd/sd-bus.h>

int sd_bus_pending_method_calls( sd_bus *bus);

Description¶

sd_bus_pending_method_calls() returns the number of currently pending outgoing method calls, i.e. method calls enqueued with sd_bus_call_async(3) for which no reply has been received yet, and which have not reached a timeout yet.

The bus argument may be NULL, in which case zero is returned.

Return Value¶

This function returns 0 if there are no pending method calls, or a NULL bus object was specified. On failure, a negative errno-style error code is returned.

Errors¶

Returned errors may indicate the following problems:

-ECHILD¶: The bus connection has been created in a different process, library or module instance.

Notes¶

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

All functions listed here are thread-agnostic and only a single thread may operate on a given object at any given time. Different threads may access the same object at different times. Multiple independent objects may be used from different threads in parallel.

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.

History¶

sd_bus_pending_method_calls() was added in version 257.