cpp-sample-bindings

Table of Contents

• Summary
• Reference
• Features
• Getting started

Summary

A collection of sample code snippets demonstrating how to create bindings for various programming languages based on C++

Reference

• Python Bindings: Calling C or C++ From Python
• CXX — safe FFI between Rust and C++

Features

• Modular code base
• CI workflows for QA
• Sample Python wrappers refering to C++ compiled source code resulting in shared libraries
• Sample Rust wrappers utilizing cxx and refering to C++ source code
• Sample Go wrappers refering to C++ compiled source code resulting in shared libraries
• Sample C# wrappers refering to C++ compiled source code resulting in shared libraries
• C++ audio module (Optional, Experimental)
• C++ video module (Optional, Experimental)

Getting started

Prerequisite

• Download and install CMake from the official website or trough a package manager
• Install vcpkg from the official website or trough a package manager
• Check dependencies required for your Linux, MacOS or Windows system in pr.yml workflow
• Add git submodules: git subdmodule update --init

CMake

Unix

In order to compile the source code and link the binaries run in a Unix terminal:

cd devops/scripts/bash/
./compile_source_code.sh -CMakeToolchainFile third-party/vcpkg/scripts/buildsystems/vcpkg.cmake

In order to additionaly start the test executables in a Unix terminal:

cd devops/scripts/bash/
./compile_source_code.sh -CMakeToolchainFile third-party/vcpkg/scripts/buildsystems/vcpkg.cmake -RunTests

Windows

In order to compile the source code and link the binaries run in a PowerShell terminal:

cd devops\scripts\ps1
.\compile_source_code.ps1 -CMakeToolchainFile third-party/vcpkg/scripts/buildsystems/vcpkg.cmake

In order to additionaly start the test executables in a PowerShell terminal:

cd devops\scripts\ps1
.\compile_source_code.ps1 -CMakeToolchainFile third-party/vcpkg/scripts/buildsystems/vcpkg.cmake -RunTests

Bindings

Python

After C++ source code compilation resuting in a shared library, run:

cd bindings/python
python main.py --path <path to libcore_wrapper.so> --wrapper <core, audio> --audio_file_path <path to audio file if wrapper option 'audio' is selected>

C#

After C++ source code compilation resuting in a shared library, run:

cd bindings/csharp
dotnet build
# Copy on unix systems the libcore_wrapper.so to the `bindings/c#/Mgtt.CoreWrapper/bin/Debug/net8.0` folder
dotnet run

Go

After C++ source code compilation resuting in a shared library, run:

cd bindings/go
# Copy in the devcontainer the libcore_wrapper.so to this folder
export LD_LIBRARY_PATH=/workspaces/cpp-sample-bindings/bindings/go/libcore_wrapper.so:$LD_LIBRARY_PATH
go run main.go

Rust

Run (does not consider a shared library from compiled C++ source code):

cd bindings/rust
cargo run