38 lines
1.3 KiB
Rust
38 lines
1.3 KiB
Rust
/*
|
|
* Copyright (C) 2021 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
//! Helpers for implementing an RPC Binder client.
|
|
|
|
use binder::unstable_api::{new_spibinder, AIBinder};
|
|
use binder::{StatusCode, Strong};
|
|
|
|
/// Connects to a binder RPC server.
|
|
pub fn connect_rpc_binder<T: binder::FromIBinder + ?Sized>(
|
|
cid: u32,
|
|
port: u32,
|
|
) -> Result<Strong<T>, StatusCode> {
|
|
// SAFETY: AIBinder returned by RpcClient has correct reference count, and the ownership can be
|
|
// safely taken by new_spibinder.
|
|
let ibinder = unsafe {
|
|
new_spibinder(binder_rpc_unstable_bindgen::RpcClient(cid, port) as *mut AIBinder)
|
|
};
|
|
if let Some(ibinder) = ibinder {
|
|
<T>::try_from(ibinder)
|
|
} else {
|
|
Err(StatusCode::BAD_VALUE)
|
|
}
|
|
}
|