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// Copyright (c) 2013-2015 Sandstorm Development Group, Inc. and contributors
// Licensed under the MIT License:
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#![cfg(feature = "alloc")]
use crate::any_pointer;
use crate::capability::{Params, Promise, RemotePromise, Request, Results};
use crate::MessageSize;
pub trait ResponseHook {
fn get(&self) -> crate::Result<any_pointer::Reader<'_>>;
}
pub trait RequestHook {
fn get(&mut self) -> any_pointer::Builder<'_>;
fn get_brand(&self) -> usize;
fn send(self: alloc::boxed::Box<Self>) -> RemotePromise<any_pointer::Owned>;
fn tail_send(
self: alloc::boxed::Box<Self>,
) -> Option<(
u32,
crate::capability::Promise<(), crate::Error>,
alloc::boxed::Box<dyn PipelineHook>,
)>;
}
pub trait ClientHook {
fn add_ref(&self) -> alloc::boxed::Box<dyn ClientHook>;
fn new_call(
&self,
interface_id: u64,
method_id: u16,
size_hint: Option<MessageSize>,
) -> Request<any_pointer::Owned, any_pointer::Owned>;
fn call(
&self,
interface_id: u64,
method_id: u16,
params: alloc::boxed::Box<dyn ParamsHook>,
results: alloc::boxed::Box<dyn ResultsHook>,
) -> crate::capability::Promise<(), crate::Error>;
/// If this capability is associated with an rpc connection, then this method
/// returns an identifier for that connection.
fn get_brand(&self) -> usize;
/// Returns a (locally) unique identifier for this capabilitiy.
fn get_ptr(&self) -> usize;
/// If this ClientHook is a promise that has already resolved, returns the inner, resolved version
/// of the capability. The caller may permanently replace this client with the resolved one if
/// desired. Returns null if the client isn't a promise or hasn't resolved yet -- use
/// `whenMoreResolved()` to distinguish between them.
fn get_resolved(&self) -> Option<alloc::boxed::Box<dyn ClientHook>>;
/// If this client is a settled reference (not a promise), return nullptr. Otherwise, return a
/// promise that eventually resolves to a new client that is closer to being the final, settled
/// client (i.e. the value eventually returned by `getResolved()`). Calling this repeatedly
/// should eventually produce a settled client.
fn when_more_resolved(
&self,
) -> Option<crate::capability::Promise<alloc::boxed::Box<dyn ClientHook>, crate::Error>>;
/// Repeatedly calls whenMoreResolved() until it returns nullptr.
fn when_resolved(&self) -> Promise<(), crate::Error>;
}
impl Clone for alloc::boxed::Box<dyn ClientHook> {
fn clone(&self) -> Self {
self.add_ref()
}
}
pub trait ResultsHook {
fn get(&mut self) -> crate::Result<any_pointer::Builder<'_>>;
fn allow_cancellation(&self);
fn tail_call(
self: alloc::boxed::Box<Self>,
request: alloc::boxed::Box<dyn RequestHook>,
) -> Promise<(), crate::Error>;
fn direct_tail_call(
self: alloc::boxed::Box<Self>,
request: alloc::boxed::Box<dyn RequestHook>,
) -> (
crate::capability::Promise<(), crate::Error>,
alloc::boxed::Box<dyn PipelineHook>,
);
}
pub trait ParamsHook {
fn get(&self) -> crate::Result<crate::any_pointer::Reader<'_>>;
}
// Where should this live?
pub fn internal_get_typed_params<T>(typeless: Params<any_pointer::Owned>) -> Params<T> {
Params {
hook: typeless.hook,
marker: ::core::marker::PhantomData,
}
}
pub fn internal_get_typed_results<T>(typeless: Results<any_pointer::Owned>) -> Results<T> {
Results {
hook: typeless.hook,
marker: ::core::marker::PhantomData,
}
}
pub fn internal_get_untyped_results<T>(typeful: Results<T>) -> Results<any_pointer::Owned> {
Results {
hook: typeful.hook,
marker: ::core::marker::PhantomData,
}
}
pub trait PipelineHook {
fn add_ref(&self) -> alloc::boxed::Box<dyn PipelineHook>;
fn get_pipelined_cap(&self, ops: &[PipelineOp]) -> alloc::boxed::Box<dyn ClientHook>;
/// Version of get_pipelined_cap() passing the array by move. May avoid a copy in some cases.
/// Default implementation just calls the other version.
fn get_pipelined_cap_move(
&self,
ops: alloc::vec::Vec<PipelineOp>,
) -> alloc::boxed::Box<dyn ClientHook> {
self.get_pipelined_cap(&ops)
}
}
impl Clone for alloc::boxed::Box<dyn PipelineHook> {
fn clone(&self) -> Self {
self.add_ref()
}
}
#[derive(Clone, Copy)]
pub enum PipelineOp {
Noop,
GetPointerField(u16),
}