1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef CHRE_UTIL_SYSTEM_FIXED_SIZE_BLOCKING_QUEUE_IMPL_H_
18 #define CHRE_UTIL_SYSTEM_FIXED_SIZE_BLOCKING_QUEUE_IMPL_H_
19
20 // IWYU pragma: private
21 #include "chre/util/lock_guard.h"
22 #include "chre/util/system/fixed_size_blocking_queue.h"
23
24 namespace chre {
25
26 namespace blocking_queue_internal {
27
28 template <typename ElementType, typename QueueStorageType>
empty()29 bool BlockingQueueCore<ElementType, QueueStorageType>::empty() {
30 LockGuard<Mutex> lock(mMutex);
31 return QueueStorageType::empty();
32 }
33
34 template <typename ElementType, typename QueueStorageType>
size()35 size_t BlockingQueueCore<ElementType, QueueStorageType>::size() {
36 LockGuard<Mutex> lock(mMutex);
37 return QueueStorageType::size();
38 }
39
40 template <typename ElementType, typename QueueStorageType>
remove(size_t index)41 bool BlockingQueueCore<ElementType, QueueStorageType>::remove(size_t index) {
42 LockGuard<Mutex> lock(mMutex);
43 return QueueStorageType::remove(index);
44 }
45
46 template <typename ElementType, typename QueueStorageType>
47 ElementType &BlockingQueueCore<ElementType, QueueStorageType>::operator[](
48 size_t index) {
49 LockGuard<Mutex> lock(mMutex);
50 return QueueStorageType::operator[](index);
51 }
52
53 template <typename ElementType, typename QueueStorageType>
54 const ElementType &BlockingQueueCore<ElementType, QueueStorageType>::operator[](
55 size_t index) const {
56 LockGuard<Mutex> lock(mMutex);
57 return QueueStorageType::operator[](index);
58 }
59
60 template <typename ElementType, typename QueueStorageType>
push(const ElementType & element)61 bool BlockingQueueCore<ElementType, QueueStorageType>::push(
62 const ElementType &element) {
63 bool success;
64 {
65 LockGuard<Mutex> lock(mMutex);
66 success = QueueStorageType::push(element);
67 }
68 if (success) {
69 mConditionVariable.notify_one();
70 }
71 return success;
72 }
73
74 template <typename ElementType, typename QueueStorageType>
push(ElementType && element)75 bool BlockingQueueCore<ElementType, QueueStorageType>::push(
76 ElementType &&element) {
77 bool success;
78 {
79 LockGuard<Mutex> lock(mMutex);
80 success = QueueStorageType::push(std::move(element));
81 }
82 if (success) {
83 mConditionVariable.notify_one();
84 }
85 return success;
86 }
87
88 template <typename ElementType, typename QueueStorageType>
pop()89 ElementType BlockingQueueCore<ElementType, QueueStorageType>::pop() {
90 LockGuard<Mutex> lock(mMutex);
91 while (QueueStorageType::empty()) {
92 mConditionVariable.wait(mMutex);
93 }
94
95 ElementType element(std::move(QueueStorageType::front()));
96 QueueStorageType::pop();
97 return element;
98 }
99
100 } // namespace blocking_queue_internal
101
102 } // namespace chre
103
104 #endif // CHRE_UTIL_BLOCKING_QUEUE_IMPL_H_
105