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/*
** Copyright 2011, 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 "egl_cache.h"
#include <log/log.h>
#include <private/EGL/cache.h>
#include <unistd.h>
#include <thread>
#include "../egl_impl.h"
#include "egl_display.h"
// Cache size limits.
static const size_t maxKeySize = 12 * 1024;
static const size_t maxValueSize = 64 * 1024;
static const size_t maxTotalSize = 2 * 1024 * 1024;
// The time in seconds to wait before saving newly inserted cache entries.
static const unsigned int deferredSaveDelay = 4;
namespace android {
#define BC_EXT_STR "EGL_ANDROID_blob_cache"
// called from android_view_ThreadedRenderer.cpp
void egl_set_cache_filename(const char* filename) {
egl_cache_t::get()->setCacheFilename(filename);
}
//
// Callback functions passed to EGL.
//
static void setBlob(const void* key, EGLsizeiANDROID keySize, const void* value,
EGLsizeiANDROID valueSize) {
egl_cache_t::get()->setBlob(key, keySize, value, valueSize);
}
static EGLsizeiANDROID getBlob(const void* key, EGLsizeiANDROID keySize, void* value,
EGLsizeiANDROID valueSize) {
return egl_cache_t::get()->getBlob(key, keySize, value, valueSize);
}
//
// egl_cache_t definition
//
egl_cache_t::egl_cache_t() : mInitialized(false) {}
egl_cache_t::~egl_cache_t() {}
egl_cache_t egl_cache_t::sCache;
egl_cache_t* egl_cache_t::get() {
return &sCache;
}
void egl_cache_t::initialize(egl_display_t* display) {
std::lock_guard<std::mutex> lock(mMutex);
egl_connection_t* const cnx = &gEGLImpl;
if (cnx->dso && cnx->major >= 0 && cnx->minor >= 0) {
const char* exts = display->disp.queryString.extensions;
size_t bcExtLen = strlen(BC_EXT_STR);
size_t extsLen = strlen(exts);
bool equal = !strcmp(BC_EXT_STR, exts);
bool atStart = !strncmp(BC_EXT_STR " ", exts, bcExtLen + 1);
bool atEnd = (bcExtLen + 1) < extsLen &&
!strcmp(" " BC_EXT_STR, exts + extsLen - (bcExtLen + 1));
bool inMiddle = strstr(exts, " " BC_EXT_STR " ") != nullptr;
if (equal || atStart || atEnd || inMiddle) {
PFNEGLSETBLOBCACHEFUNCSANDROIDPROC eglSetBlobCacheFuncsANDROID;
eglSetBlobCacheFuncsANDROID = reinterpret_cast<PFNEGLSETBLOBCACHEFUNCSANDROIDPROC>(
cnx->egl.eglGetProcAddress("eglSetBlobCacheFuncsANDROID"));
if (eglSetBlobCacheFuncsANDROID == nullptr) {
ALOGE("EGL_ANDROID_blob_cache advertised, "
"but unable to get eglSetBlobCacheFuncsANDROID");
return;
}
eglSetBlobCacheFuncsANDROID(display->disp.dpy, android::setBlob, android::getBlob);
EGLint err = cnx->egl.eglGetError();
if (err != EGL_SUCCESS) {
ALOGE("eglSetBlobCacheFuncsANDROID resulted in an error: "
"%#x",
err);
}
}
}
mInitialized = true;
}
void egl_cache_t::terminate() {
std::lock_guard<std::mutex> lock(mMutex);
if (mBlobCache) {
mBlobCache->writeToFile();
}
mBlobCache = nullptr;
}
void egl_cache_t::setBlob(const void* key, EGLsizeiANDROID keySize, const void* value,
EGLsizeiANDROID valueSize) {
std::lock_guard<std::mutex> lock(mMutex);
if (keySize < 0 || valueSize < 0) {
ALOGW("EGL_ANDROID_blob_cache set: negative sizes are not allowed");
return;
}
if (mInitialized) {
BlobCache* bc = getBlobCacheLocked();
bc->set(key, keySize, value, valueSize);
if (!mSavePending) {
mSavePending = true;
std::thread deferredSaveThread([this]() {
sleep(deferredSaveDelay);
std::lock_guard<std::mutex> lock(mMutex);
if (mInitialized && mBlobCache) {
mBlobCache->writeToFile();
}
mSavePending = false;
});
deferredSaveThread.detach();
}
}
}
EGLsizeiANDROID egl_cache_t::getBlob(const void* key, EGLsizeiANDROID keySize, void* value,
EGLsizeiANDROID valueSize) {
std::lock_guard<std::mutex> lock(mMutex);
if (keySize < 0 || valueSize < 0) {
ALOGW("EGL_ANDROID_blob_cache set: negative sizes are not allowed");
return 0;
}
if (mInitialized) {
BlobCache* bc = getBlobCacheLocked();
return bc->get(key, keySize, value, valueSize);
}
return 0;
}
void egl_cache_t::setCacheFilename(const char* filename) {
std::lock_guard<std::mutex> lock(mMutex);
mFilename = filename;
}
BlobCache* egl_cache_t::getBlobCacheLocked() {
if (mBlobCache == nullptr) {
mBlobCache.reset(new FileBlobCache(maxKeySize, maxValueSize, maxTotalSize, mFilename));
}
return mBlobCache.get();
}
}; // namespace android
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