npsd 0.2.0

Network payload serializer / deserializer framework
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164

use std::{borrow::Cow, 
    // cell::{Cell, Ref, RefCell, UnsafeCell}, 
    pin::Pin, 
    // ptr, rc::Rc, 
    sync::{Arc, Weak}
};

use super::{Error, AsyncMiddleware, AsyncPayload, AsyncIntoPayload, AsyncFromPayload};

macro_rules! impl_payload_smart_slice_traits {
    ($container:ident) => {
        impl<C: Send + Sync, T: AsyncIntoPayload<C>> AsyncIntoPayload<C> for $container<T> {
            #[inline]
            async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
                next.poll_into_payload(self.as_ref(), ctx).await
            }
        }

        impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C>> AsyncFromPayload<'a, C> for $container<T> 
            where T: ToOwned 
        {
            #[inline]
            async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
                Ok($container::new(next.poll_from_payload::<C, T>(ctx).await?))
            }
        }

        impl<'a, C: Send + Sync, T: AsyncPayload<'a, C>> AsyncPayload<'a, C> for $container<T> 
            where T: Clone {}

        impl<C: Send + Sync, T: AsyncIntoPayload<C>> AsyncIntoPayload<C> for $container<[T]> {
            #[inline]
            async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
                next.poll_into_payload(&self.as_ref(), ctx).await
            }
        }

        impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C>> AsyncFromPayload<'a, C> for $container<[T]> 
            where T: Clone + 'a 
        {
            #[inline]
            async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
                Ok($container::from(next.poll_from_payload::<C, Cow<'a, [T]>>(ctx).await?.into_owned()))
            }
        }

        impl<'a, C: Send + Sync, T: AsyncPayload<'a, C>> AsyncPayload<'a, C> for $container<[T]> 
            where T: Clone {}
    };
}

impl_payload_smart_slice_traits!(Box);
impl_payload_smart_slice_traits!(Arc);

// // TODO(): Disabled because Send + Sync
// impl_payload_smart_slice_traits!(Rc);

// // TODO(): Disabled because Send + Sync
// impl<C: Send + Sync, T: AsyncIntoPayload<C> + Copy> AsyncIntoPayload<C> for UnsafeCell<T> {
//     #[inline]
//     async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
//         next.poll_into_payload::<C, T>(unsafe { &*self.get() }, ctx).await
//     }
// }

// impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C>> AsyncFromPayload<'a, C> for UnsafeCell<T> {
//     #[inline]
//     async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
//         Ok(UnsafeCell::new(next.poll_from_payload::<C, T>(ctx).await?))
//     }
// }

// impl<'a, C: Send + Sync, T: AsyncPayload<'a, C> + Copy> AsyncPayload<'a, C> for UnsafeCell<T> {}

// // TODO(): Disabled because Send + Sync
// impl<C: Send + Sync, T: AsyncIntoPayload<C> + Copy> AsyncIntoPayload<C> for Cell<T> {
//     #[inline]
//     async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
//         next.poll_into_payload::<C, T>(&self.get(), ctx).await
//     }
// }

// impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C>> AsyncFromPayload<'a, C> for Cell<T> {
//     #[inline]
//     async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
//         Ok(Cell::new(next.poll_from_payload::<C, T>(ctx).await?))
//     }
// }

// impl<'a, C: Send + Sync, T: AsyncPayload<'a, C> + Copy> AsyncPayload<'a, C> for Cell<T> {}

// impl<'a, C: Send + Sync, T: AsyncIntoPayload<C>> AsyncIntoPayload<C> for Ref<'a, T> {
//     #[inline]
//     async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
//         next.poll_into_payload(&**self, ctx).await
//     }
// }

// // TODO(): Disabled because Send + Sync
// impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C>> AsyncFromPayload<'a, C> for Ref<'a, T> {
//     async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
//         let boxed_ref_cell = Box::new(RefCell::new(next.poll_from_payload::<C, T>(ctx).await?));
//         let cell: &'a RefCell<T> = Box::leak(boxed_ref_cell);

//         let borrowed = cell.borrow();
//         let borrowed_ptr: *const T = &*borrowed;

//         Ok(unsafe { ptr::read(borrowed_ptr as *const Ref<'a, T>) })
//     }
// }

// // TODO(): Disabled because Send + Sync
// impl<'a, C: Send + Sync, T: AsyncPayload<'a, C>> AsyncPayload<'a, C> for Ref<'a, T> {}

// impl<C: Send + Sync, T: AsyncIntoPayload<C>> AsyncIntoPayload<C> for RefCell<T> {
//     #[inline]
//     async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
//         next.poll_into_payload(&*self.borrow(), ctx).await
//     }
// }

// impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C>> AsyncFromPayload<'a, C> for RefCell<T> {
//     #[inline]
//     async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
//         Ok(RefCell::new(next.poll_from_payload::<C, T>(ctx).await?))
//     }
// }

// impl<'a, C: Send + Sync, T: AsyncPayload<'a, C>> AsyncPayload<'a, C> for RefCell<T> {}

impl<C: Send + Sync, T: AsyncIntoPayload<C>> AsyncIntoPayload<C> for Pin<Box<T>> {
    #[inline]
    async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
        next.poll_into_payload(self.as_ref().get_ref(), ctx).await
    }
}

impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C>> AsyncFromPayload<'a, C> for Pin<Box<T>> {
    #[inline]
    async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
        Ok(Pin::from(Box::pin(next.poll_from_payload::<C, T>(ctx).await?)))
    }
}

impl<'a, C: Send + Sync, T: AsyncPayload<'a, C>> AsyncPayload<'a, C> for Pin<Box<T>> {}

impl<C: Send + Sync, T: AsyncIntoPayload<C>> AsyncIntoPayload<C> for Weak<T> {
    async fn poll_into_payload<'m, M: AsyncMiddleware<'m>>(&self, ctx: &mut C, next: &mut M) -> Result<(), Error> {
        if let Some(strong) = self.upgrade() {
            next.poll_into_payload(&strong, ctx).await
        } else {
            Err(Error::WeakUpgrade)
        }
    }
}

impl<'a, C: Send + Sync, T: AsyncFromPayload<'a, C> + Clone> AsyncFromPayload<'a, C> for Weak<T> {
    #[inline]
    async fn poll_from_payload<M: AsyncMiddleware<'a>>(ctx: &mut C, next: &mut M) -> Result<Self, Error> {
        Ok(Arc::downgrade(&next.poll_from_payload::<C, Arc<T>>(ctx).await?))
    }
}

impl<'a, C: Send + Sync, T: AsyncPayload<'a, C> + Clone> AsyncPayload<'a, C> for Weak<T> {}