Unreleased

Added

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zth::Locked RAII for scoped locks of zth::Mutex.
std::chrono conversions for zth::Timestamp and zth::TimeInterval.
std::promise and std::future specializations to wrap zth::Future.
std::async specialization for fibers.
C++20 Coroutine support using zth::coro::task<T> and zth::coro::generator<T>.
zth::join and zth::joiner for easy fiber/future joins.

Make REUSE compliant.
Fixes for tooling on Ubuntu 24.04.
Use std::terminate() instead of std::abort() on errors, to allow setting a handler.
Redirect standard assert() failure handling to zth::assert_handler().
Fix support for newlib 4.4.0.
Config::MinTimeslice and Config::TimesliceOverrunReportThreshold return struct timespec for performance reasons.
Removed async keyword in favor of zth_async, as it conflicts with C++11 <future>.
Deprecated zth_async in favor of zth::fiber and zth::async.
Renamed zth::fiber() to zth::factory() and implement zth::fiber() to actually return a fiber.
Streamlined fiber type member functions.
Removed deprecated old FSM implementation.

zth::fiber() as alternative to zth_fiber() and friends with async.
Defining async can be prevented by defining ZTH_NO_ASYNC_KEYWORD before including <zth>. zth_async is always defined, with the original behavior of async.
Make split zth::fsm::Fsm into a BasicFsm and Fsm, of which the former does not need fiber and timestamps to run. As a result, the BasicFsm can be executed in an interrupt routine.
Fix support for builds without exceptions and environmental variables to reduce library size.
Change license to MPLv2.

Initial version.

Fibers/worker/scheduling and all other required basics.
setjmp()/longjmp(), sigaltstack(), ucontext(), WinFiber context switching approaches.
FSM (C++14) implementation.
Extensible Poller framework.
Ubuntu/macOS/Windows/ARM (QEMU) example builds.