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src/tools/runtime.rs: implement get_runtime_with_builder

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This commit is contained in:
Dietmar Maurer 2020-07-07 10:11:04 +02:00
parent 1ff840ffad
commit f91d58e157
1 changed files with 24 additions and 13 deletions
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31
src/tools/runtime.rs
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@ -56,30 +56,41 @@ extern {
///
/// This makes sure that tokio's worker threads are marked for us so that we know whether we
/// can/need to use `block_in_place` in our `block_on` helper.
pub fn get_runtime() -> Arc<Runtime> {
pub fn get_runtime_with_builder<F: Fn() -> runtime::Builder>(get_builder: F) -> Arc<Runtime> {
let mut guard = RUNTIME.lock().unwrap();
if let Some(rt) = guard.upgrade() { return rt; }
let rt = Arc::new(
runtime::Builder::new()
.on_thread_stop(|| {
let mut builder = get_builder();
builder.on_thread_stop(|| {
// avoid openssl bug: https://github.com/openssl/openssl/issues/6214
// call OPENSSL_thread_stop to avoid race with openssl cleanup handlers
unsafe { OPENSSL_thread_stop(); }
})
.threaded_scheduler()
.enable_all()
.build()
.expect("failed to spawn tokio runtime")
);
});
let runtime = builder.build().expect("failed to spawn tokio runtime");
let rt = Arc::new(runtime);
*guard = Arc::downgrade(&rt.clone());
rt
}
/// Get or create the current main tokio runtime.
///
/// This calls get_runtime_with_builder() using the tokio default threaded scheduler
pub fn get_runtime() -> Arc<Runtime> {
get_runtime_with_builder(|| {
let mut builder = runtime::Builder::new();
builder.threaded_scheduler();
builder.enable_all();
builder
})
}
/// Block on a synchronous piece of code.
pub fn block_in_place<R>(fut: impl FnOnce() -> R) -> R {
// don't double-exit the context (tokio doesn't like that)