Merge "EGL: add deferred saving of the cache" into ics-mr1 (72f172e7) · Commits · e / devices / smdk4412 / android_frameworks_native

opengl/libs/EGL/egl_cache.cpp

+27 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,9 @@ static const size_t maxTotalSize = 64 * 1024;
		static const char* cacheFileMagic = "EGL$";
		static const size_t cacheFileHeaderSize = 8;

		// The time in seconds to wait before saving newly inserted cache entries.
		static const unsigned int deferredSaveDelay = 4;

		// ----------------------------------------------------------------------------
		namespace android {
		// ----------------------------------------------------------------------------
		@@ -128,6 +131,30 @@ void egl_cache_t::setBlob(const void* key, EGLsizei keySize, const void* value,
		if (mInitialized) {
		sp<BlobCache> bc = getBlobCacheLocked();
		bc->set(key, keySize, value, valueSize);

		if (!mSavePending) {
		class DeferredSaveThread : public Thread {
		public:
		DeferredSaveThread() : Thread(false) {}

		virtual bool threadLoop() {
		sleep(deferredSaveDelay);
		egl_cache_t* c = egl_cache_t::get();
		Mutex::Autolock lock(c->mMutex);
		if (c->mInitialized) {
		c->saveBlobCacheLocked();
		}
		c->mSavePending = false;
		return false;
		}
		};

		// The thread will hold a strong ref to itself until it has finished
		// running, so there's no need to keep a ref around.
		sp<Thread> deferredSaveThread(new DeferredSaveThread());
		mSavePending = true;
		deferredSaveThread->run();
		}
		}
		}

+7 −0

Original line number	Diff line number	Diff line
		@@ -108,6 +108,13 @@ private:
		// from disk.
		String8 mFilename;

		// mSavePending indicates whether or not a deferred save operation is
		// pending. Each time a key/value pair is inserted into the cache via
		// setBlob, a deferred save is initiated if one is not already pending.
		// This will wait some amount of time and then trigger a save of the cache
		// contents to disk.
		bool mSavePending;

		// mMutex is the mutex used to prevent concurrent access to the member
		// variables. It must be locked whenever the member variables are accessed.
		mutable Mutex mMutex;