Building C++ Concurrency

This repository contains two related C++20 concurrency libraries:

• Signal Tree is a concurrent readiness set for fast, idempotent signal selection when FIFO ordering is unnecessary.
• Work Contract stores persistent activities, schedules them through Signal Tree, and lets application-owned workers execute them.

The libraries share the bcpp::concurrency namespace but remain independently usable CMake targets.

Use	Header	CMake target
Signal Tree only	<library/signal_tree.h>	bcpp::signal_tree
Work Contract and its automatic Signal Tree dependency	<library/work_contract.h>	bcpp::work_contract
Complete repository API	<library/concurrency.h>	bcpp::concurrency

Start with the bcpp::concurrency documentation, which links the guides, concurrency contracts, test coverage, and future work for each library.

Build and test

cmake -S . -B build
cmake --build build -j
ctest --test-dir build --output-on-failure

Benchmarks are opt-in through SIGNAL_TREE_BUILD_BENCHMARK and WORK_CONTRACT_BUILD_BENCHMARK so ordinary builds and downstream consumers do not acquire benchmark-only dependencies.

The project is licensed under the MIT License.