Fix build system for windows targets

[RobbieG15]

This will fix windows build systems.

There is a stricter usage of Chrono with windows and MSVC.

Thank you for all the work on this project.

Let me know if there is anything else I can do if this does not fix it for you all.

I verified that this works on my windows machine.

[greptile-apps]

Greptile Summary

Adds an explicit std::chrono::duration_cast<std::chrono::system_clock::duration> when constructing the time_point in GetTimestampFromSerializedMessage. On MSVC/Windows, system_clock::duration uses 100-nanosecond ticks rather than nanoseconds, so the implicit conversion is a narrowing operation that MSVC rejects at compile time. The fix is correct and idiomatic with no behavior change on Linux.

Confidence Score: 5/5

Safe to merge — single-line correctness fix with no behavior change on Linux and correct behavior on Windows.

The change is minimal, well-targeted, and uses the standard idiomatic solution for cross-platform chrono portability. No logic or data-integrity concerns.

No files require special attention.

Important Files Changed

Filename	Overview
greenwave_monitor/src/greenwave_monitor.cpp	Adds duration_cast to fix implicit narrowing conversion error on MSVC/Windows where system_clock::duration is 100ns ticks rather than nanoseconds

Sequence Diagram

sequenceDiagram
    participant Caller
    participant GetTimestamp
    participant chrono
    Caller->>GetTimestamp: GetTimestampFromSerializedMessage(msg)
    GetTimestamp->>GetTimestamp: Extract sec/nsec from buffer[4..11]
    GetTimestamp->>chrono: seconds(sec) + nanoseconds(nsec)
    chrono-->>GetTimestamp: combined nanoseconds duration
    GetTimestamp->>chrono: duration_cast<system_clock::duration>(combined)
    Note over chrono: Linux: no-op (already nanoseconds)<br/>Windows: truncates to 100ns ticks
    chrono-->>GetTimestamp: platform-native duration
    GetTimestamp-->>Caller: time_point<system_clock>

Loading

_{Reviews (3): Last reviewed commit: "Fix the linting errors" | Re-trigger Greptile}

[sgillen]

Hi @RobbieG15, thanks! Happy to merge this. Looks like some linting errors on older distros and I don't think the commit was signed. Both pre commit hooks for linting and the sign off instructions can be found here: https://github.com/NVIDIA-ISAAC-ROS/greenwave_monitor/blob/main/Contributing.md

[RobbieG15]

@sgillen,

Those linting/format errors should be resolved and all tests are passing. I also signed the commits. Let me know if there is anything else I should do.

Thanks!