Rework and simplify internals

perf-event/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "perf-event2"
-version = "0.7.4"
+version = "0.8.0"
 description = "A Rust interface to Linux performance monitoring"
 license = "MIT OR Apache-2.0"
 authors = ["Sean Lynch <sean@lynches.ca>", "Jim Blandy <jimb@red-bean.com>"]
@@ -29,6 +29,7 @@ libc = "0.2"
 memmap2 = "0.9"
 perf-event-data = "0.1.8"
 perf-event-open-sys2 = "5.0.4"
+thiserror = "2.0.14"
 
 [dev-dependencies]
 ctrlc = "3.4.5"

perf-event/examples/tracepoint.rs

@@ -0,0 +1,21 @@
+use perf_event::data::Record;
+use perf_event::events::Tracepoint;
+use perf_event::{Builder, CpuPid};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let mut counter = Builder::new(Tracepoint::with_name("net/net_dev_xmit")?)
+        .targeting(CpuPid::AnyProcessOneCpu { cpu: 0 })
+        .build()?
+        .sampled(8192)?;
+
+    counter.enable()?;
+
+    while let Some(record) = counter.next_blocking(None) {
+        println!("received event");
+        if let Ok(Record::Sample(sample)) = record.parse_record() {
+            dbg!(sample);
+        }
+    }
+
+    Ok(())
+}