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/*
* Copyright (C) 2017 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.
*/
#include "ShaderCache.h"
#include <algorithm>
#include <log/log.h>
#include <thread>
#include "FileBlobCache.h"
#include "utils/TraceUtils.h"
namespace android {
namespace uirenderer {
namespace skiapipeline {
// Cache size limits.
static const size_t maxKeySize = 1024;
static const size_t maxValueSize = 64 * 1024;
static const size_t maxTotalSize = 512 * 1024;
ShaderCache::ShaderCache() {
// There is an "incomplete FileBlobCache type" compilation error, if ctor is moved to header.
}
ShaderCache ShaderCache::sCache;
ShaderCache& ShaderCache::get() {
return sCache;
}
void ShaderCache::initShaderDiskCache() {
ATRACE_NAME("initShaderDiskCache");
std::lock_guard<std::mutex> lock(mMutex);
if (mFilename.length() > 0) {
mBlobCache.reset(new FileBlobCache(maxKeySize, maxValueSize, maxTotalSize, mFilename));
mInitialized = true;
}
}
void ShaderCache::setFilename(const char* filename) {
std::lock_guard<std::mutex> lock(mMutex);
mFilename = filename;
}
BlobCache* ShaderCache::getBlobCacheLocked() {
LOG_ALWAYS_FATAL_IF(!mInitialized, "ShaderCache has not been initialized");
return mBlobCache.get();
}
sk_sp<SkData> ShaderCache::load(const SkData& key) {
ATRACE_NAME("ShaderCache::load");
size_t keySize = key.size();
std::lock_guard<std::mutex> lock(mMutex);
if (!mInitialized) {
ALOGE("ShaderCache::load not initialized");
return nullptr;
}
// mObservedBlobValueSize is reasonably big to avoid memory reallocation
// Allocate a buffer with malloc. SkData takes ownership of that allocation and will call free.
void* valueBuffer = malloc(mObservedBlobValueSize);
if (!valueBuffer) {
return nullptr;
}
BlobCache* bc = getBlobCacheLocked();
size_t valueSize = bc->get(key.data(), keySize, valueBuffer, mObservedBlobValueSize);
int maxTries = 3;
while (valueSize > mObservedBlobValueSize && maxTries > 0) {
mObservedBlobValueSize = std::min(valueSize, maxValueSize);
valueBuffer = realloc(valueBuffer, mObservedBlobValueSize);
if (!valueBuffer) {
return nullptr;
}
valueSize = bc->get(key.data(), keySize, valueBuffer, mObservedBlobValueSize);
maxTries--;
}
if (!valueSize) {
free(valueBuffer);
return nullptr;
}
if (valueSize > mObservedBlobValueSize) {
ALOGE("ShaderCache::load value size is too big %d", (int) valueSize);
free(valueBuffer);
return nullptr;
}
return SkData::MakeFromMalloc(valueBuffer, valueSize);
}
void ShaderCache::store(const SkData& key, const SkData& data) {
ATRACE_NAME("ShaderCache::store");
std::lock_guard<std::mutex> lock(mMutex);
if (!mInitialized) {
ALOGE("ShaderCache::store not initialized");
return;
}
size_t valueSize = data.size();
size_t keySize = key.size();
if (keySize == 0 || valueSize == 0 || valueSize >= maxValueSize) {
ALOGW("ShaderCache::store: sizes %d %d not allowed", (int)keySize, (int)valueSize);
return;
}
const void* value = data.data();
BlobCache* bc = getBlobCacheLocked();
bc->set(key.data(), keySize, value, valueSize);
if (!mSavePending && mDeferredSaveDelay > 0) {
mSavePending = true;
std::thread deferredSaveThread([this]() {
sleep(mDeferredSaveDelay);
std::lock_guard<std::mutex> lock(mMutex);
ATRACE_NAME("ShaderCache::saveToDisk");
if (mInitialized && mBlobCache) {
mBlobCache->writeToFile();
}
mSavePending = false;
});
deferredSaveThread.detach();
}
}
} /* namespace skiapipeline */
} /* namespace uirenderer */
} /* namespace android */
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