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/*
* Copyright 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.
*/
//#define LOG_NDEBUG 0
#undef LOG_TAG
#define LOG_TAG "BufferStateLayerCache"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
#include <cinttypes>
#include "BufferStateLayerCache.h"
namespace android {
ANDROID_SINGLETON_STATIC_INSTANCE(BufferStateLayerCache);
BufferStateLayerCache::BufferStateLayerCache() : mDeathRecipient(new CacheDeathRecipient) {}
void BufferStateLayerCache::add(const sp<IBinder>& processToken, uint64_t id,
const sp<GraphicBuffer>& buffer) {
if (!processToken) {
ALOGE("failed to cache buffer: invalid process token");
return;
}
if (!buffer) {
ALOGE("failed to cache buffer: invalid buffer");
return;
}
std::lock_guard lock(mMutex);
// If this is a new process token, set a death recipient. If the client process dies, we will
// get a callback through binderDied.
if (mBuffers.find(processToken) == mBuffers.end()) {
status_t err = processToken->linkToDeath(mDeathRecipient);
if (err != NO_ERROR) {
ALOGE("failed to cache buffer: could not link to death");
return;
}
}
auto& processBuffers = mBuffers[processToken];
if (processBuffers.size() > BUFFER_CACHE_MAX_SIZE) {
ALOGE("failed to cache buffer: cache is full");
return;
}
processBuffers[id] = buffer;
}
void BufferStateLayerCache::erase(const sp<IBinder>& processToken, uint64_t id) {
if (!processToken) {
ALOGE("failed to uncache buffer: invalid process token");
return;
}
std::lock_guard lock(mMutex);
if (mBuffers.find(processToken) == mBuffers.end()) {
ALOGE("failed to uncache buffer: process token not found");
return;
}
auto& processBuffers = mBuffers[processToken];
processBuffers.erase(id);
}
sp<GraphicBuffer> BufferStateLayerCache::get(const sp<IBinder>& processToken, uint64_t id) {
if (!processToken) {
ALOGE("failed to cache buffer: invalid process token");
return nullptr;
}
std::lock_guard lock(mMutex);
auto itr = mBuffers.find(processToken);
if (itr == mBuffers.end()) {
ALOGE("failed to get buffer: process token not found");
return nullptr;
}
if (itr->second.find(id) == itr->second.end()) {
ALOGE("failed to get buffer: buffer not found");
return nullptr;
}
return itr->second[id];
}
void BufferStateLayerCache::removeProcess(const wp<IBinder>& processToken) {
std::lock_guard lock(mMutex);
mBuffers.erase(processToken);
}
void BufferStateLayerCache::CacheDeathRecipient::binderDied(const wp<IBinder>& who) {
BufferStateLayerCache::getInstance().removeProcess(who);
}
}; // namespace android
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