// Copyright © 2017 Mozilla Foundation
//
// This program is made available under an ISC-style license.  See the
// accompanying file LICENSE for details.

use ffi;
use mainloop_api;
use mainloop_api::MainloopApi;
use ErrorCode;
use Result;

#[derive(Debug)]
pub struct ThreadedMainloop(*mut ffi::pa_threaded_mainloop);

impl ThreadedMainloop {
    pub unsafe fn from_raw_ptr(raw: *mut ffi::pa_threaded_mainloop) -> Self {
        ThreadedMainloop(raw)
    }

    pub fn new() -> Self {
        unsafe { ThreadedMainloop::from_raw_ptr(ffi::pa_threaded_mainloop_new()) }
    }

    pub fn raw_mut(&self) -> &mut ffi::pa_threaded_mainloop {
        unsafe { &mut *self.0 }
    }

    pub fn is_null(&self) -> bool {
        self.0.is_null()
    }

    pub fn start(&self) -> Result<()> {
        match unsafe { ffi::pa_threaded_mainloop_start(self.raw_mut()) } {
            0 => Ok(()),
            _ => Err(ErrorCode::from_error_code(ffi::PA_ERR_UNKNOWN)),
        }
    }

    pub fn stop(&self) {
        unsafe {
            ffi::pa_threaded_mainloop_stop(self.raw_mut());
        }
    }

    pub fn lock(&self) {
        unsafe {
            ffi::pa_threaded_mainloop_lock(self.raw_mut());
        }
    }

    pub fn unlock(&self) {
        unsafe {
            ffi::pa_threaded_mainloop_unlock(self.raw_mut());
        }
    }

    pub fn wait(&self) {
        unsafe {
            ffi::pa_threaded_mainloop_wait(self.raw_mut());
        }
    }

    pub fn signal(&self) {
        unsafe {
            ffi::pa_threaded_mainloop_signal(self.raw_mut(), 0);
        }
    }

    pub fn get_api(&self) -> MainloopApi {
        unsafe { mainloop_api::from_raw_ptr(ffi::pa_threaded_mainloop_get_api(self.raw_mut())) }
    }

    pub fn in_thread(&self) -> bool {
        unsafe { ffi::pa_threaded_mainloop_in_thread(self.raw_mut()) != 0 }
    }
}

impl ::std::default::Default for ThreadedMainloop {
    fn default() -> Self {
        ThreadedMainloop(::std::ptr::null_mut())
    }
}

impl ::std::ops::Drop for ThreadedMainloop {
    fn drop(&mut self) {
        if !self.is_null() {
            unsafe {
                ffi::pa_threaded_mainloop_free(self.raw_mut());
            }
        }
    }
}
