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//! Lightweigh green threads & coroutines in stable Rust.
//!
//! # Getting started
//!  
//! Add greenie to your `Cargo.toml`:
//! ```toml
//! [dependencies]
//! greenie = "*"
//! ```
//!
//! Create greenie main function in `src/main.rs`:
//! ```ignore
//! use greenie::*;
//!
//! #[greenie_main]
//! fn main() {
//!     
//! }
//! // Or you can invoke `create_main`:
//! fn main() {
//!     create_main(|| {
//!     });
//! }
//!
//! ```
//!
//!
//! # Example
//! Ping-pong program
//! ```ignore
//! use greenie::channel::*;
//!
//! use greenie::{greeny_main, Fiber};
//! #[greeny_main]
//! fn main() {
//!     let chan_1 = Channel::<&'static str>::new(2);
//!     let chan_2 = Channel::<&'static str>::new(2);
//!     let fping = Fiber::new_capture(
//!         |chan_1, chan_2| {
//!             chan_1.send("ping");
//!             println!("{}", chan_2.recv().unwrap());
//!             chan_1.send("ping");
//!             println!("{}", chan_2.recv().unwrap());
//!             chan_1.send("ping");
//!             println!("{}", chan_2.recv().unwrap());
//!         },
//!         (chan_1.clone(), chan_2.clone()),
//!     );
//!     let fpong = Fiber::new_capture(
//!         |chan_1, chan_2| {
//!             chan_2.send("pong");
//!             println!("{}", chan_1.recv().unwrap());
//!             chan_2.send("pong");
//!             println!("{}", chan_1.recv().unwrap());
//!             chan_2.send("pong");
//!             println!("{}", chan_1.recv().unwrap());
//!         },
//!         (chan_1.clone(), chan_2.clone()),
//!     );
//!
//!     fpong.start().unwrap();
//!     fping.start().unwrap();
//! }
//! ```

#![allow(dead_code, improper_ctypes)]

#[macro_use]
extern crate intrusive_collections;

pub mod algorithm;
pub mod common;
pub mod ctx;
pub mod fiber;
pub mod generator;
pub mod ptr;
pub mod scheduler;
pub use generator::generator_yield;
pub use scheduler::{spawn_greenie, yield_thread};

pub use greenie_proc::{greenify, greeny_main};
/// Puts the current thread to sleep for at least the specified amount of time.
///
/// The thread may sleep longer than the duration specified due to scheduling specifics or platform-dependent functionality. It will
/// never sleep less.
pub fn thread_sleep(duration: std::time::Duration) {
    let now = std::time::Instant::now();

    while duration > now.elapsed() {
        crate::yield_thread();
    }
}
use ctx::Context;

pub use fiber::Fiber;
pub use generator::*;
/// Specify entry point for program that will use greenie.
pub fn create_main(main_fn: fn()) -> ! {
    scheduler::RUNTIME.with(|rt| {
        let h = rt.get().spawn(|f, _| f(), (main_fn, ()));
        rt.get().main_ctx = h.thread();
        rt.main_ctx.get().is_main = true;
        rt.get().run();

        //unsafe { std::intrinsics::drop_in_place(rt.0) };
    });
    unreachable!()
}