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 #include <atomic>
18 
19 #include "EffectMap.h"
20 
21 namespace android {
22 
23 ANDROID_SINGLETON_STATIC_INSTANCE(EffectMap);
24 
25 // static
26 const uint64_t EffectMap::INVALID_ID = 0;
27 
28 // static
makeUniqueId()29 uint64_t EffectMap::makeUniqueId() {
30     static std::atomic<uint64_t> counter{INVALID_ID + 1};
31     return counter++;
32 }
33 
add(effect_handle_t handle)34 uint64_t EffectMap::add(effect_handle_t handle) {
35     uint64_t newId = makeUniqueId();
36     std::lock_guard<std::mutex> lock(mLock);
37     mEffects.add(newId, handle);
38     return newId;
39 }
40 
get(const uint64_t & id)41 effect_handle_t EffectMap::get(const uint64_t& id) {
42     std::lock_guard<std::mutex> lock(mLock);
43     ssize_t idx = mEffects.indexOfKey(id);
44     return idx >= 0 ? mEffects[idx] : NULL;
45 }
46 
remove(effect_handle_t handle)47 void EffectMap::remove(effect_handle_t handle) {
48     std::lock_guard<std::mutex> lock(mLock);
49     for (size_t i = 0; i < mEffects.size(); ++i) {
50         if (mEffects[i] == handle) {
51             mEffects.removeItemsAt(i);
52             break;
53         }
54     }
55 }
56 
57 }  // namespace android
58