1 /*
2 * Copyright 2019 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 //#define LOG_NDEBUG 0
18 #undef LOG_TAG
19 #define LOG_TAG "RenderEngine"
20 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
21
22 #include <pthread.h>
23
24 #include <processgroup/sched_policy.h>
25 #include <utils/Trace.h>
26 #include "GLESRenderEngine.h"
27 #include "ImageManager.h"
28
29 namespace android {
30 namespace renderengine {
31 namespace gl {
32
ImageManager(GLESRenderEngine * engine)33 ImageManager::ImageManager(GLESRenderEngine* engine) : mEngine(engine) {}
34
initThread()35 void ImageManager::initThread() {
36 mThread = std::thread([this]() { threadMain(); });
37 pthread_setname_np(mThread.native_handle(), "ImageManager");
38 // Use SCHED_FIFO to minimize jitter
39 struct sched_param param = {0};
40 param.sched_priority = 2;
41 if (pthread_setschedparam(mThread.native_handle(), SCHED_FIFO, ¶m) != 0) {
42 ALOGE("Couldn't set SCHED_FIFO for ImageManager");
43 }
44 }
45
~ImageManager()46 ImageManager::~ImageManager() {
47 {
48 std::lock_guard<std::mutex> lock(mMutex);
49 mRunning = false;
50 }
51 mCondition.notify_all();
52 if (mThread.joinable()) {
53 mThread.join();
54 }
55 }
56
cacheAsync(const sp<GraphicBuffer> & buffer,const std::shared_ptr<Barrier> & barrier)57 void ImageManager::cacheAsync(const sp<GraphicBuffer>& buffer,
58 const std::shared_ptr<Barrier>& barrier) {
59 if (buffer == nullptr) {
60 {
61 std::lock_guard<std::mutex> lock(barrier->mutex);
62 barrier->isOpen = true;
63 barrier->result = BAD_VALUE;
64 }
65 barrier->condition.notify_one();
66 return;
67 }
68 ATRACE_CALL();
69 QueueEntry entry = {QueueEntry::Operation::Insert, buffer, buffer->getId(), barrier};
70 queueOperation(std::move(entry));
71 }
72
cache(const sp<GraphicBuffer> & buffer)73 status_t ImageManager::cache(const sp<GraphicBuffer>& buffer) {
74 ATRACE_CALL();
75 auto barrier = std::make_shared<Barrier>();
76 cacheAsync(buffer, barrier);
77 std::lock_guard<std::mutex> lock(barrier->mutex);
78 barrier->condition.wait(barrier->mutex,
79 [&]() REQUIRES(barrier->mutex) { return barrier->isOpen; });
80 return barrier->result;
81 }
82
releaseAsync(uint64_t bufferId,const std::shared_ptr<Barrier> & barrier)83 void ImageManager::releaseAsync(uint64_t bufferId, const std::shared_ptr<Barrier>& barrier) {
84 ATRACE_CALL();
85 QueueEntry entry = {QueueEntry::Operation::Delete, nullptr, bufferId, barrier};
86 queueOperation(std::move(entry));
87 }
88
queueOperation(const QueueEntry && entry)89 void ImageManager::queueOperation(const QueueEntry&& entry) {
90 {
91 std::lock_guard<std::mutex> lock(mMutex);
92 mQueue.emplace(entry);
93 ATRACE_INT("ImageManagerQueueDepth", mQueue.size());
94 }
95 mCondition.notify_one();
96 }
97
threadMain()98 void ImageManager::threadMain() {
99 set_sched_policy(0, SP_FOREGROUND);
100 bool run;
101 {
102 std::lock_guard<std::mutex> lock(mMutex);
103 run = mRunning;
104 }
105 while (run) {
106 QueueEntry entry;
107 {
108 std::lock_guard<std::mutex> lock(mMutex);
109 mCondition.wait(mMutex,
110 [&]() REQUIRES(mMutex) { return !mQueue.empty() || !mRunning; });
111 run = mRunning;
112
113 if (!mRunning) {
114 // if mRunning is false, then ImageManager is being destroyed, so
115 // bail out now.
116 break;
117 }
118
119 entry = mQueue.front();
120 mQueue.pop();
121 ATRACE_INT("ImageManagerQueueDepth", mQueue.size());
122 }
123
124 status_t result = NO_ERROR;
125 switch (entry.op) {
126 case QueueEntry::Operation::Delete:
127 mEngine->unbindExternalTextureBufferInternal(entry.bufferId);
128 break;
129 case QueueEntry::Operation::Insert:
130 result = mEngine->cacheExternalTextureBufferInternal(entry.buffer);
131 break;
132 }
133 if (entry.barrier != nullptr) {
134 {
135 std::lock_guard<std::mutex> entryLock(entry.barrier->mutex);
136 entry.barrier->result = result;
137 entry.barrier->isOpen = true;
138 }
139 entry.barrier->condition.notify_one();
140 }
141 }
142
143 ALOGD("Reached end of threadMain, terminating ImageManager thread!");
144 }
145
146 } // namespace gl
147 } // namespace renderengine
148 } // namespace android
149