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
|
/******************************************************************************
*
* Copyright (C) 2019 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.
*
******************************************************************************/
#pragma once
#include "common/callback.h"
#include "os/queue.h"
namespace bluetooth {
namespace common {
//
// Interface for one context to send and receive data over
// a pair of queues (|BidiQueue|).
//
template <typename TENQUEUE, typename TDEQUEUE>
class BidiQueueEnd : public ::bluetooth::os::IQueueEnqueue<TENQUEUE>,
public ::bluetooth::os::IQueueDequeue<TDEQUEUE> {
public:
using EnqueueCallback = Callback<std::unique_ptr<TENQUEUE>()>;
using DequeueCallback = Callback<void()>;
BidiQueueEnd(::bluetooth::os::IQueueEnqueue<TENQUEUE>* tx,
::bluetooth::os::IQueueDequeue<TDEQUEUE>* rx)
: tx_(tx), rx_(rx) {}
void RegisterEnqueue(::bluetooth::os::Handler* handler, EnqueueCallback callback) override {
tx_->RegisterEnqueue(handler, callback);
}
void UnregisterEnqueue() override { tx_->UnregisterEnqueue(); }
void RegisterDequeue(::bluetooth::os::Handler* handler, DequeueCallback callback) override {
rx_->RegisterDequeue(handler, callback);
}
void UnregisterDequeue() override { rx_->UnregisterDequeue(); }
std::unique_ptr<TDEQUEUE> TryDequeue() override { return rx_->TryDequeue(); }
private:
::bluetooth::os::IQueueEnqueue<TENQUEUE>* tx_;
::bluetooth::os::IQueueDequeue<TDEQUEUE>* rx_;
};
//
// Interface managing a pair of queues shared between two contexts
// (typically layers of the stack).
//
// The up queue can be used for data to indicate up to bluetooth host and
// the down queue can be used for data to sent to bluetooth controller.
// Each context uses its |BidiQueueEnd| to manage their data operations:
//
// The up end:
// - Receives data indicated from the down end.
// - Sends data to the down end.
//
// The down end:
// - Receives data sent from the up end.
// - Indicates data to the up end.
//
template <typename TUP, typename TDOWN>
class BidiQueue {
public:
explicit BidiQueue(size_t capacity)
: up_queue_(capacity),
down_queue_(capacity),
up_end_(&down_queue_, &up_queue_),
down_end_(&up_queue_, &down_queue_) {}
BidiQueueEnd<TDOWN, TUP>* GetUpEnd() { return &up_end_; }
BidiQueueEnd<TUP, TDOWN>* GetDownEnd() { return &down_end_; }
private:
::bluetooth::os::Queue<TUP> up_queue_;
::bluetooth::os::Queue<TDOWN> down_queue_;
BidiQueueEnd<TDOWN, TUP> up_end_;
BidiQueueEnd<TUP, TDOWN> down_end_;
};
} // namespace common
} // namespace bluetooth
|