mirror of https://github.com/axmolengine/axmol.git
Fixbug: Need to replace thread unsafe code from TextureCache::addImageAsync.
This commit is contained in:
Vincent Yang
parent
a6b29666c9
commit
1f8b46e911
|
|
@ -61,8 +61,6 @@ TextureCache * TextureCache::getInstance()
|
|||
|
||||
TextureCache::TextureCache()
|
||||
: _loadingThread(nullptr)
|
||||
, _asyncStructQueue(nullptr)
|
||||
, _imageInfoQueue(nullptr)
|
||||
, _needQuit(false)
|
||||
, _asyncRefCount(0)
|
||||
{
|
||||
|
|
@ -96,6 +94,43 @@ std::string TextureCache::getDescription() const
|
|||
return StringUtils::format("<TextureCache | Number of textures = %d>", static_cast<int>(_textures.size()));
|
||||
}
|
||||
|
||||
struct TextureCache::AsyncStruct
|
||||
{
|
||||
public:
|
||||
AsyncStruct(const std::string& fn, std::function<void(Texture2D*)> f) : filename(fn), callback(f), loadSuccess(false) {}
|
||||
|
||||
std::string filename;
|
||||
std::function<void(Texture2D*)> callback;
|
||||
Image image;
|
||||
bool loadSuccess;
|
||||
};
|
||||
|
||||
/**
|
||||
The addImageAsync logic follow the steps:
|
||||
- find the image has been add or not, if not add an AsyncStruct to _requestQueue (GL thread)
|
||||
- get AsyncStruct from _requestQueue, load res and fill image data to AsyncStruct.image, then add AsyncStruct to _responseQueue (Load thread)
|
||||
- on schedule callback, get AsyncStruct from _responseQueue, convert image to texture, then delete AsyncStruct (GL thread)
|
||||
|
||||
the Critical Area include these members:
|
||||
- _requestQueue: locked by _requestMutex
|
||||
- _responseQueue: locked by _responseMutex
|
||||
|
||||
the object's life time:
|
||||
- AsyncStruct: construct and destruct in GL thread
|
||||
- image data: new in Load thread, delete in GL thread(by Image instance)
|
||||
|
||||
Note:
|
||||
- all AsyncStruct referenced in _asyncStructQueue, for unbind function use.
|
||||
|
||||
How to deal add image many times?
|
||||
- At first, this situation is abnormal, we only ensure the logic is correct.
|
||||
- If the image has been loaded, the after load image call will return immediately.
|
||||
- If the image request is in queue already, there will be have more than one request in queue,
|
||||
- In addImageAsyncCallback, will deduplacated the request to ensure only create one texture.
|
||||
|
||||
Does process all response in addImageAsyncCallback consume more time?
|
||||
- Convert image to texture faster than load image from disk, so this isn't a problem.
|
||||
*/
|
||||
void TextureCache::addImageAsync(const std::string &path, const std::function<void(Texture2D*)>& callback)
|
||||
{
|
||||
Texture2D *texture = nullptr;
|
||||
|
|
@ -119,14 +154,10 @@ void TextureCache::addImageAsync(const std::string &path, const std::function<vo
|
|||
}
|
||||
|
||||
// lazy init
|
||||
if (_asyncStructQueue == nullptr)
|
||||
{
|
||||
_asyncStructQueue = new (std::nothrow) deque<AsyncStruct*>();
|
||||
_imageInfoQueue = new (std::nothrow) deque<ImageInfo*>();
|
||||
|
||||
if (_loadingThread == nullptr)
|
||||
{
|
||||
// create a new thread to load images
|
||||
_loadingThread = new std::thread(&TextureCache::loadImage, this);
|
||||
|
||||
_needQuit = false;
|
||||
}
|
||||
|
||||
|
|
@ -139,213 +170,151 @@ void TextureCache::addImageAsync(const std::string &path, const std::function<vo
|
|||
|
||||
// generate async struct
|
||||
AsyncStruct *data = new (std::nothrow) AsyncStruct(fullpath, callback);
|
||||
|
||||
|
||||
// add async struct into queue
|
||||
_asyncMutex.lock();
|
||||
_asyncStructQueue->push_back(data);
|
||||
_asyncMutex.unlock();
|
||||
_asyncStructQueue.push_back(data);
|
||||
_requestMutex.lock();
|
||||
_requestQueue.push_back(data);
|
||||
_requestMutex.unlock();
|
||||
|
||||
_sleepCondition.notify_one();
|
||||
}
|
||||
|
||||
void TextureCache::unbindImageAsync(const std::string& filename)
|
||||
{
|
||||
if (_asyncStructQueue.empty())
|
||||
{
|
||||
return;
|
||||
}
|
||||
std::string fullpath = FileUtils::getInstance()->fullPathForFilename(filename);
|
||||
|
||||
_asyncMutex.lock();
|
||||
|
||||
if (_asyncStructQueue && !_asyncStructQueue->empty())
|
||||
for (auto it = _asyncStructQueue.begin(); it != _asyncStructQueue.end(); ++it)
|
||||
{
|
||||
for (auto it = _asyncStructQueue->begin(); it != _asyncStructQueue->end(); ++it)
|
||||
{
|
||||
if ((*it)->filename == fullpath)
|
||||
{
|
||||
(*it)->callback = nullptr;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (_imageInfoQueue && !_imageInfoQueue->empty())
|
||||
{
|
||||
for (auto it = _imageInfoQueue->begin(); it != _imageInfoQueue->end(); ++it)
|
||||
{
|
||||
if ((*it)->asyncStruct->filename == fullpath)
|
||||
{
|
||||
(*it)->asyncStruct->callback = nullptr;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
_asyncMutex.unlock();
|
||||
}
|
||||
|
||||
void TextureCache::unbindAllImageAsync()
|
||||
{
|
||||
_asyncMutex.lock();
|
||||
if (_asyncStructQueue && !_asyncStructQueue->empty())
|
||||
{
|
||||
for (auto it = _asyncStructQueue->begin(); it != _asyncStructQueue->end(); ++it)
|
||||
if ((*it)->filename == fullpath)
|
||||
{
|
||||
(*it)->callback = nullptr;
|
||||
}
|
||||
}
|
||||
if (_imageInfoQueue && !_imageInfoQueue->empty())
|
||||
}
|
||||
|
||||
void TextureCache::unbindAllImageAsync()
|
||||
{
|
||||
if (_asyncStructQueue.empty())
|
||||
{
|
||||
for (auto it = _imageInfoQueue->begin(); it != _imageInfoQueue->end(); ++it)
|
||||
{
|
||||
(*it)->asyncStruct->callback = nullptr;
|
||||
}
|
||||
return;
|
||||
|
||||
}
|
||||
for (auto it = _asyncStructQueue.begin(); it != _asyncStructQueue.end(); ++it)
|
||||
{
|
||||
(*it)->callback = nullptr;
|
||||
}
|
||||
_asyncMutex.unlock();
|
||||
}
|
||||
|
||||
void TextureCache::loadImage()
|
||||
{
|
||||
AsyncStruct *asyncStruct = nullptr;
|
||||
|
||||
while (true)
|
||||
std::unique_lock<std::mutex> signal(_signalMutex);
|
||||
while (!_needQuit)
|
||||
{
|
||||
_asyncMutex.lock();
|
||||
if (_asyncStructQueue->empty())
|
||||
// pop an AsyncStruct from request queue
|
||||
_requestMutex.lock();
|
||||
if(_requestQueue.empty())
|
||||
{
|
||||
_asyncMutex.unlock();
|
||||
if (_needQuit) {
|
||||
break;
|
||||
}
|
||||
else {
|
||||
std::unique_lock<std::mutex> lk(_sleepMutex);
|
||||
_sleepCondition.wait(lk);
|
||||
continue;
|
||||
}
|
||||
asyncStruct = nullptr;
|
||||
}else
|
||||
{
|
||||
asyncStruct = _requestQueue.front();
|
||||
_requestQueue.pop_front();
|
||||
}
|
||||
else
|
||||
{
|
||||
asyncStruct = _asyncStructQueue->front();
|
||||
_asyncMutex.unlock();
|
||||
}
|
||||
|
||||
Image *image = nullptr;
|
||||
bool generateImage = false;
|
||||
|
||||
auto it = _textures.find(asyncStruct->filename);
|
||||
if( it == _textures.end() )
|
||||
{
|
||||
ImageInfo *imageInfo;
|
||||
size_t pos = 0;
|
||||
_asyncMutex.lock();
|
||||
size_t infoSize = _imageInfoQueue->size();
|
||||
for (; pos < infoSize; pos++)
|
||||
{
|
||||
imageInfo = (*_imageInfoQueue)[pos];
|
||||
if(imageInfo->asyncStruct->filename.compare(asyncStruct->filename) == 0)
|
||||
break;
|
||||
}
|
||||
_asyncMutex.unlock();
|
||||
if(infoSize == 0 || pos == infoSize)
|
||||
generateImage = true;
|
||||
_requestMutex.unlock();
|
||||
|
||||
if (nullptr == asyncStruct) {
|
||||
_sleepCondition.wait(signal);
|
||||
continue;
|
||||
}
|
||||
|
||||
// load image
|
||||
asyncStruct->loadSuccess = asyncStruct->image.initWithImageFileThreadSafe(asyncStruct->filename);
|
||||
|
||||
if (generateImage)
|
||||
{
|
||||
const std::string& filename = asyncStruct->filename;
|
||||
// generate image
|
||||
image = new (std::nothrow) Image();
|
||||
if (image && !image->initWithImageFileThreadSafe(filename))
|
||||
{
|
||||
CC_SAFE_RELEASE(image);
|
||||
CCLOG("can not load %s", filename.c_str());
|
||||
_asyncMutex.lock();
|
||||
_asyncStructQueue->pop_front();
|
||||
_asyncMutex.unlock();
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
// generate image info
|
||||
ImageInfo *imageInfo = new (std::nothrow) ImageInfo();
|
||||
imageInfo->asyncStruct = asyncStruct;
|
||||
imageInfo->image = image;
|
||||
|
||||
// put the image info into the queue
|
||||
_asyncMutex.lock();
|
||||
_asyncStructQueue->pop_front();
|
||||
_imageInfoQueue->push_back(imageInfo);
|
||||
_asyncMutex.unlock();
|
||||
}
|
||||
|
||||
if(_asyncStructQueue != nullptr)
|
||||
{
|
||||
delete _asyncStructQueue;
|
||||
_asyncStructQueue = nullptr;
|
||||
delete _imageInfoQueue;
|
||||
_imageInfoQueue = nullptr;
|
||||
// push the asyncStruct to response queue
|
||||
_responseMutex.lock();
|
||||
_responseQueue.push_back(asyncStruct);
|
||||
_responseMutex.unlock();
|
||||
}
|
||||
}
|
||||
|
||||
void TextureCache::addImageAsyncCallBack(float dt)
|
||||
{
|
||||
// the image is generated in loading thread
|
||||
std::deque<ImageInfo*> *imagesQueue = _imageInfoQueue;
|
||||
|
||||
_asyncMutex.lock();
|
||||
if (imagesQueue->empty())
|
||||
Texture2D *texture = nullptr;
|
||||
AsyncStruct *asyncStruct = nullptr;
|
||||
while (true)
|
||||
{
|
||||
_asyncMutex.unlock();
|
||||
}
|
||||
else
|
||||
{
|
||||
ImageInfo *imageInfo = imagesQueue->front();
|
||||
imagesQueue->pop_front();
|
||||
_asyncMutex.unlock();
|
||||
|
||||
AsyncStruct *asyncStruct = imageInfo->asyncStruct;
|
||||
Image *image = imageInfo->image;
|
||||
|
||||
const std::string& filename = asyncStruct->filename;
|
||||
|
||||
Texture2D *texture = nullptr;
|
||||
if (image)
|
||||
// pop an AsyncStruct from response queue
|
||||
_responseMutex.lock();
|
||||
if(_responseQueue.empty())
|
||||
{
|
||||
// generate texture in render thread
|
||||
texture = new (std::nothrow) Texture2D();
|
||||
|
||||
texture->initWithImage(image);
|
||||
//parse 9-patch info
|
||||
this->parseNinePatchImage(image, texture, filename);
|
||||
#if CC_ENABLE_CACHE_TEXTURE_DATA
|
||||
// cache the texture file name
|
||||
VolatileTextureMgr::addImageTexture(texture, filename);
|
||||
#endif
|
||||
// cache the texture. retain it, since it is added in the map
|
||||
_textures.insert( std::make_pair(filename, texture) );
|
||||
texture->retain();
|
||||
|
||||
texture->autorelease();
|
||||
asyncStruct = nullptr;
|
||||
}else
|
||||
{
|
||||
asyncStruct = _responseQueue.front();
|
||||
_responseQueue.pop_front();
|
||||
|
||||
// the asyncStruct's sequence order in _asyncStructQueue must equal to the order in _responseQueue
|
||||
CC_ASSERT(asyncStruct == _asyncStructQueue.front());
|
||||
_asyncStructQueue.pop_front();
|
||||
}
|
||||
_responseMutex.unlock();
|
||||
|
||||
if (nullptr == asyncStruct) {
|
||||
break;
|
||||
}
|
||||
|
||||
// check the image has been convert to texture or not
|
||||
auto it = _textures.find(asyncStruct->filename);
|
||||
if(it != _textures.end())
|
||||
{
|
||||
texture = it->second;
|
||||
}
|
||||
else
|
||||
{
|
||||
auto it = _textures.find(asyncStruct->filename);
|
||||
if(it != _textures.end())
|
||||
texture = it->second;
|
||||
// convert image to texture
|
||||
if (asyncStruct->loadSuccess)
|
||||
{
|
||||
Image* image = &(asyncStruct->image);
|
||||
// generate texture in render thread
|
||||
texture = new (std::nothrow) Texture2D();
|
||||
|
||||
texture->initWithImage(image);
|
||||
//parse 9-patch info
|
||||
this->parseNinePatchImage(image, texture, asyncStruct->filename);
|
||||
#if CC_ENABLE_CACHE_TEXTURE_DATA
|
||||
// cache the texture file name
|
||||
VolatileTextureMgr::addImageTexture(texture, asyncStruct->filename);
|
||||
#endif
|
||||
// cache the texture. retain it, since it is added in the map
|
||||
_textures.insert( std::make_pair(asyncStruct->filename, texture) );
|
||||
texture->retain();
|
||||
|
||||
texture->autorelease();
|
||||
} else {
|
||||
texture = nullptr;
|
||||
CCLOG("cocos2d: failed to call TextureCache::addImageAsync(%s)", asyncStruct->filename.c_str());
|
||||
}
|
||||
}
|
||||
|
||||
// call callback function
|
||||
if (asyncStruct->callback)
|
||||
{
|
||||
asyncStruct->callback(texture);
|
||||
(asyncStruct->callback)(texture);
|
||||
}
|
||||
|
||||
if(image)
|
||||
{
|
||||
image->release();
|
||||
}
|
||||
delete asyncStruct;
|
||||
delete imageInfo;
|
||||
|
||||
--_asyncRefCount;
|
||||
if (0 == _asyncRefCount)
|
||||
{
|
||||
Director::getInstance()->getScheduler()->unschedule(CC_SCHEDULE_SELECTOR(TextureCache::addImageAsyncCallBack), this);
|
||||
}
|
||||
// release the asyncStruct
|
||||
delete asyncStruct;
|
||||
--asyncStruct;
|
||||
}
|
||||
|
||||
if (0 == _asyncRefCount)
|
||||
{
|
||||
Director::getInstance()->getScheduler()->unschedule(CC_SCHEDULE_SELECTOR(TextureCache::addImageAsyncCallBack), this);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -209,30 +209,19 @@ private:
|
|||
void loadImage();
|
||||
void parseNinePatchImage(Image* image, Texture2D* texture, const std::string& path);
|
||||
public:
|
||||
struct AsyncStruct
|
||||
{
|
||||
public:
|
||||
AsyncStruct(const std::string& fn, std::function<void(Texture2D*)> f) : filename(fn), callback(f) {}
|
||||
|
||||
std::string filename;
|
||||
std::function<void(Texture2D*)> callback;
|
||||
};
|
||||
|
||||
protected:
|
||||
typedef struct _ImageInfo
|
||||
{
|
||||
AsyncStruct *asyncStruct;
|
||||
Image *image;
|
||||
} ImageInfo;
|
||||
struct AsyncStruct;
|
||||
|
||||
std::thread* _loadingThread;
|
||||
|
||||
std::deque<AsyncStruct*>* _asyncStructQueue;
|
||||
std::deque<ImageInfo*>* _imageInfoQueue;
|
||||
std::deque<AsyncStruct*> _asyncStructQueue;
|
||||
std::deque<AsyncStruct*> _requestQueue;
|
||||
std::deque<AsyncStruct*> _responseQueue;
|
||||
|
||||
std::mutex _asyncMutex;
|
||||
|
||||
std::mutex _sleepMutex;
|
||||
std::mutex _requestMutex;
|
||||
std::mutex _responseMutex;
|
||||
|
||||
std::mutex _signalMutex;
|
||||
std::condition_variable _sleepCondition;
|
||||
|
||||
bool _needQuit;
|
||||
|
|
|
|||
Loading…
Reference in New Issue