StratoSDK is a framework with a declarative approach similar to Flutter/React, written and designed entirely for Rust.
| 1 | use std::sync::{Arc, Mutex}; |
| 2 | |
| 3 | use bounded_vec_deque::BoundedVecDeque; |
| 4 | use instant::Instant; |
| 5 | use lazy_static::lazy_static; |
| 6 | |
| 7 | lazy_static! { |
| 8 | static ref TRACES: Arc<Mutex<Traces>> = Arc::new(Mutex::new(Traces::new())); |
| 9 | } |
| 10 | |
| 11 | const MAX_BUFFER_SIZE: usize = 1024; |
| 12 | |
| 13 | struct Traces { |
| 14 | // Bounded in case we are tracing a lot of events and we don't want to blow |
| 15 | // up memory |
| 16 | events: BoundedVecDeque<TraceEvent>, |
| 17 | end_after_next: Option<&'static str>, |
| 18 | } |
| 19 | |
| 20 | impl Traces { |
| 21 | fn new() -> Self { |
| 22 | Self { |
| 23 | events: BoundedVecDeque::new(MAX_BUFFER_SIZE), |
| 24 | end_after_next: None, |
| 25 | } |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | struct TraceEvent { |
| 30 | timestamp: Instant, |
| 31 | name: &'static str, |
| 32 | } |
| 33 | |
| 34 | #[macro_export] |
| 35 | macro_rules! start_trace { |
| 36 | ($name:expr) => { |
| 37 | #[cfg(feature = "traces")] |
| 38 | $crate::traces::start_trace($name) |
| 39 | }; |
| 40 | } |
| 41 | |
| 42 | #[macro_export] |
| 43 | macro_rules! record_trace_event { |
| 44 | ($name:expr) => { |
| 45 | #[cfg(feature = "traces")] |
| 46 | $crate::traces::record_event($name) |
| 47 | }; |
| 48 | } |
| 49 | |
| 50 | #[macro_export] |
| 51 | macro_rules! end_trace_after_next { |
| 52 | ($name:expr) => { |
| 53 | #[cfg(feature = "traces")] |
| 54 | $crate::traces::end_trace_after_next($name) |
| 55 | }; |
| 56 | } |
| 57 | |
| 58 | #[macro_export] |
| 59 | macro_rules! end_trace { |
| 60 | () => { |
| 61 | #[cfg(feature = "traces")] |
| 62 | $crate::traces::end_trace() |
| 63 | }; |
| 64 | } |
| 65 | |
| 66 | pub fn start_trace(event_name: &'static str) { |
| 67 | TRACES.lock().unwrap().events.clear(); |
| 68 | record_event(event_name); |
| 69 | } |
| 70 | |
| 71 | pub fn record_event(name: &'static str) { |
| 72 | let should_end = { |
| 73 | // Separate block to let the mutex go out of scope before calling end_trace |
| 74 | let mut traces = TRACES.lock().unwrap(); |
| 75 | traces.events.push_back(TraceEvent { |
| 76 | name, |
| 77 | timestamp: Instant::now(), |
| 78 | }); |
| 79 | |
| 80 | traces.end_after_next == Some(name) |
| 81 | }; |
| 82 | if should_end { |
| 83 | end_trace(); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | pub fn end_trace_after_next(event_name: &'static str) { |
| 88 | TRACES.lock().unwrap().end_after_next = Some(event_name); |
| 89 | } |
| 90 | |
| 91 | pub fn end_trace() { |
| 92 | let mut traces = TRACES.lock().unwrap(); |
| 93 | let start = traces.events.pop_front().expect("no empty traces"); |
| 94 | for event in traces.events.iter() { |
| 95 | println!( |
| 96 | "[{:.4} ms] {} ", |
| 97 | (event.timestamp.duration_since(start.timestamp).as_micros() as f32 / 1000.), |
| 98 | event.name, |
| 99 | ); |
| 100 | } |
| 101 | traces.end_after_next = None; |
| 102 | traces.events.clear(); |
| 103 | } |
| 104 |