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use std::ops::Drop;
use supercow::{Phantomcow, Supercow};
use utils::{StreamingIterator, StreamingIteratorExt};
use ffi;
use thread::ThreadOwner;
use Thread;
pub trait ThreadsOwner {}
#[derive(Debug)]
pub(crate) struct ThreadsPtr {
pub ptr: *mut ffi::notmuch_threads_t,
}
impl Drop for ThreadsPtr {
fn drop(&mut self) {
unsafe { ffi::notmuch_threads_destroy(self.ptr) };
}
}
#[derive(Debug)]
pub struct Threads<'o, O>
where
O: ThreadsOwner + 'o,
{
handle: ThreadsPtr,
marker: Phantomcow<'o, O>,
}
impl<'o, O> ThreadOwner for Threads<'o, O> where O: ThreadsOwner + 'o {}
impl<'o, O> Threads<'o, O>
where
O: ThreadsOwner + 'o,
{
pub fn from_ptr<P>(ptr: *mut ffi::notmuch_threads_t, owner: P) -> Threads<'o, O>
where
P: Into<Phantomcow<'o, O>>,
{
Threads {
handle: ThreadsPtr { ptr },
marker: owner.into(),
}
}
}
impl<'s, 'o: 's, O> StreamingIterator<'s, Thread<'s, Self>> for Threads<'o, O>
where
O: ThreadsOwner + 'o,
{
fn next(&'s mut self) -> Option<Thread<'s, Self>> {
<Self as StreamingIteratorExt<'s, Thread<'s, Self>>>::next(Supercow::borrowed(self))
}
}
pub trait ThreadsExt<'o, O>
where
O: ThreadsOwner + 'o,
{
}
impl<'o, O> ThreadsExt<'o, O> for Threads<'o, O> where O: ThreadsOwner + 'o {}
impl<'s, 'o: 's, O> StreamingIteratorExt<'s, Thread<'s, Self>> for Threads<'o, O>
where
O: ThreadsOwner + 'o,
{
fn next<S>(threads: S) -> Option<Thread<'s, Self>>
where
S: Into<Supercow<'s, Threads<'o, O>>>,
{
let threadsref = threads.into();
let valid = unsafe { ffi::notmuch_threads_valid(threadsref.handle.ptr) };
if valid == 0 {
return None;
}
let cmsg = unsafe {
let msg = ffi::notmuch_threads_get(threadsref.handle.ptr);
ffi::notmuch_threads_move_to_next(threadsref.handle.ptr);
msg
};
Some(Thread::from_ptr(cmsg, Supercow::phantom(threadsref)))
}
}
unsafe impl<'o, O> Send for Threads<'o, O> where O: ThreadsOwner + 'o {}
unsafe impl<'o, O> Sync for Threads<'o, O> where O: ThreadsOwner + 'o {}
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