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(bool realtime)35 void ImageManager::initThread(bool realtime) {
36 mThread = std::thread([this]() { threadMain(); });
37 pthread_setname_np(mThread.native_handle(), "ImageManager");
38 if (realtime) {
39 // Use SCHED_FIFO to minimize jitter
40 struct sched_param param = {0};
41 param.sched_priority = 2;
42 if (pthread_setschedparam(mThread.native_handle(), SCHED_FIFO, ¶m) != 0) {
43 ALOGE("Couldn't set SCHED_FIFO for ImageManager");
44 }
45 }
46 }
47
~ImageManager()48 ImageManager::~ImageManager() {
49 {
50 std::lock_guard<std::mutex> lock(mMutex);
51 mRunning = false;
52 }
53 mCondition.notify_all();
54 if (mThread.joinable()) {
55 mThread.join();
56 }
57 }
58
cacheAsync(const sp<GraphicBuffer> & buffer,const std::shared_ptr<Barrier> & barrier)59 void ImageManager::cacheAsync(const sp<GraphicBuffer>& buffer,
60 const std::shared_ptr<Barrier>& barrier) {
61 if (buffer == nullptr) {
62 {
63 std::lock_guard<std::mutex> lock(barrier->mutex);
64 barrier->isOpen = true;
65 barrier->result = BAD_VALUE;
66 }
67 barrier->condition.notify_one();
68 return;
69 }
70 ATRACE_CALL();
71 QueueEntry entry = {QueueEntry::Operation::Insert, buffer, buffer->getId(), barrier};
72 queueOperation(std::move(entry));
73 }
74
cache(const sp<GraphicBuffer> & buffer)75 status_t ImageManager::cache(const sp<GraphicBuffer>& buffer) {
76 ATRACE_CALL();
77 auto barrier = std::make_shared<Barrier>();
78 cacheAsync(buffer, barrier);
79 std::lock_guard<std::mutex> lock(barrier->mutex);
80 barrier->condition.wait(barrier->mutex,
81 [&]() REQUIRES(barrier->mutex) { return barrier->isOpen; });
82 return barrier->result;
83 }
84
releaseAsync(uint64_t bufferId,const std::shared_ptr<Barrier> & barrier)85 void ImageManager::releaseAsync(uint64_t bufferId, const std::shared_ptr<Barrier>& barrier) {
86 ATRACE_CALL();
87 QueueEntry entry = {QueueEntry::Operation::Delete, nullptr, bufferId, barrier};
88 queueOperation(std::move(entry));
89 }
90
queueOperation(const QueueEntry && entry)91 void ImageManager::queueOperation(const QueueEntry&& entry) {
92 {
93 std::lock_guard<std::mutex> lock(mMutex);
94 mQueue.emplace(entry);
95 ATRACE_INT("ImageManagerQueueDepth", mQueue.size());
96 }
97 mCondition.notify_one();
98 }
99
threadMain()100 void ImageManager::threadMain() {
101 set_sched_policy(0, SP_FOREGROUND);
102 bool run;
103 {
104 std::lock_guard<std::mutex> lock(mMutex);
105 run = mRunning;
106 }
107 while (run) {
108 QueueEntry entry;
109 {
110 std::lock_guard<std::mutex> lock(mMutex);
111 mCondition.wait(mMutex,
112 [&]() REQUIRES(mMutex) { return !mQueue.empty() || !mRunning; });
113 run = mRunning;
114
115 if (!mRunning) {
116 // if mRunning is false, then ImageManager is being destroyed, so
117 // bail out now.
118 break;
119 }
120
121 entry = mQueue.front();
122 mQueue.pop();
123 ATRACE_INT("ImageManagerQueueDepth", mQueue.size());
124 }
125
126 status_t result = NO_ERROR;
127 switch (entry.op) {
128 case QueueEntry::Operation::Delete:
129 mEngine->unbindExternalTextureBufferInternal(entry.bufferId);
130 break;
131 case QueueEntry::Operation::Insert:
132 result = mEngine->cacheExternalTextureBufferInternal(entry.buffer);
133 break;
134 }
135 if (entry.barrier != nullptr) {
136 {
137 std::lock_guard<std::mutex> entryLock(entry.barrier->mutex);
138 entry.barrier->result = result;
139 entry.barrier->isOpen = true;
140 }
141 entry.barrier->condition.notify_one();
142 }
143 }
144
145 ALOGD("Reached end of threadMain, terminating ImageManager thread!");
146 }
147
148 } // namespace gl
149 } // namespace renderengine
150 } // namespace android
151