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vmm: dbus: broadcast event_monitor events over the DBus API

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This commit builds on top of the `Monitor::subscribe` function and
makes it possible to broadcast events published from `event-monitor`
over D-Bus.

The broadcasting functionality is enabled if the D-Bus API is enabled
and users who wish to also enable the file based `event-monitor` can do
so with the CLI arg `--event-monitor`.

Signed-off-by: Omer Faruk Bayram <omer.faruk@sartura.hr>
This commit is contained in:
Omer Faruk Bayram
2023-08-13 20:32:44 +00:00
committed by Bo Chen
parent e02efe9ba0
commit 2ed96cd3ed
6 changed files with 93 additions and 45 deletions
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11
event_monitor/src/lib.rs
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@@ -24,12 +24,12 @@ struct Event<'a> {
pub struct Monitor {
pub rx: flume::Receiver<String>,
pub file: File,
pub file: Option<File>,
pub broadcast: Vec<flume::Sender<Arc<String>>>,
}
impl Monitor {
pub fn new(rx: flume::Receiver<String>, file: File) -> Self {
pub fn new(rx: flume::Receiver<String>, file: Option<File>) -> Self {
Self {
rx,
file,
@@ -68,11 +68,14 @@ fn set_file_nonblocking(file: &File) -> io::Result<()> {
/// This function must only be called once from the main thread before any threads
/// are created to avoid race conditions.
pub fn set_monitor(file: File) -> io::Result<Monitor> {
pub fn set_monitor(file: Option<File>) -> io::Result<Monitor> {
// SAFETY: there is only one caller of this function, so MONITOR is written to only once
assert!(unsafe { MONITOR.is_none() });
set_file_nonblocking(&file)?;
if let Some(ref file) = file {
set_file_nonblocking(file)?;
}
let (tx, rx) = flume::unbounded();
let monitor = Monitor::new(rx, file);