47 lines
1.3 KiB
Rust
47 lines
1.3 KiB
Rust
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use std::ffi::CString;
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use tracing::{error, span, Subscriber};
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use tracing_subscriber::{layer::Context, registry::LookupSpan};
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use super::target_ndk::{Api23, NdkApi};
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pub struct Layer {
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ndk_api: Option<NdkApi>,
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}
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impl Layer {
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pub fn new(ndk_api: Option<NdkApi>) -> Self {
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Layer { ndk_api }
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}
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fn with_api(&self, f: impl FnOnce(&Api23)) {
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if let Some(v23) = self.ndk_api.as_ref().and_then(|api| api.v23.as_ref()) {
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f(v23)
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}
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}
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}
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impl<S: Subscriber> tracing_subscriber::Layer<S> for Layer
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where
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for<'lookup> S: LookupSpan<'lookup>,
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{
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fn on_enter(&self, id: &span::Id, ctx: Context<'_, S>) {
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self.with_api(|api| match ctx.metadata(id) {
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Some(metadata) => match CString::new(metadata.name()) {
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Ok(section_name) => unsafe { api.ATrace_beginSection(section_name.as_ptr()) },
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Err(_) => error!(
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"Span name contains internal NUL byte: '{}'",
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metadata.name()
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),
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},
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None => error!("Span {:?} has no metadata", id),
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});
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}
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fn on_exit(&self, _id: &span::Id, _ctx: Context<'_, S>) {
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self.with_api(|api| {
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unsafe { api.ATrace_endSection() };
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});
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}
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}
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