utrace 0.1.1

Instrumentation-based profiling library for embedded targets with async support
Documentation 
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// Spurious (?) dead_code warning
#[allow(dead_code)]
pub(crate) fn default_write(buf: &[u8]) {
    extern "Rust" {
        fn __utrace_default_transport_write(buf: &[u8]);
    }

    unsafe {
        __utrace_default_transport_write(buf);
    }
}

#[allow(dead_code)]
pub(crate) fn default_timestamp_delta() -> u32 {
    extern "Rust" {
        fn __utrace_timestamp_function() -> u64;
    }

    static mut LAST_TIMESTAMP: u64 = 0;

    let current_timestamp = unsafe { __utrace_timestamp_function() };

    let delta = (current_timestamp - unsafe { LAST_TIMESTAMP }) as u32;
    unsafe { LAST_TIMESTAMP = current_timestamp };

    delta
}