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-rw-r--r--opengl/libs/EGL/egl_cache.h130
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diff --git a/opengl/libs/EGL/egl_cache.h b/opengl/libs/EGL/egl_cache.h
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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.
- */
-
-#ifndef ANDROID_EGL_CACHE_H
-#define ANDROID_EGL_CACHE_H
-
-#include <EGL/egl.h>
-#include <EGL/eglext.h>
-
-#include <utils/BlobCache.h>
-#include <utils/String8.h>
-#include <utils/StrongPointer.h>
-
-// ----------------------------------------------------------------------------
-namespace android {
-// ----------------------------------------------------------------------------
-
-class egl_display_t;
-
-class EGLAPI egl_cache_t {
-public:
-
- // get returns a pointer to the singleton egl_cache_t object. This
- // singleton object will never be destroyed.
- static egl_cache_t* get();
-
- // initialize puts the egl_cache_t into an initialized state, such that it
- // is able to insert and retrieve entries from the cache. This should be
- // called when EGL is initialized. When not in the initialized state the
- // getBlob and setBlob methods will return without performing any cache
- // operations.
- void initialize(egl_display_t* display);
-
- // terminate puts the egl_cache_t back into the uninitialized state. When
- // in this state the getBlob and setBlob methods will return without
- // performing any cache operations.
- void terminate();
-
- // setBlob attempts to insert a new key/value blob pair into the cache.
- // This will be called by the hardware vendor's EGL implementation via the
- // EGL_ANDROID_blob_cache extension.
- void setBlob(const void* key, EGLsizeiANDROID keySize, const void* value,
- EGLsizeiANDROID valueSize);
-
- // getBlob attempts to retrieve the value blob associated with a given key
- // blob from cache. This will be called by the hardware vendor's EGL
- // implementation via the EGL_ANDROID_blob_cache extension.
- EGLsizeiANDROID getBlob(const void* key, EGLsizeiANDROID keySize,
- void* value, EGLsizeiANDROID valueSize);
-
- // setCacheFilename sets the name of the file that should be used to store
- // cache contents from one program invocation to another.
- void setCacheFilename(const char* filename);
-
-private:
- // Creation and (the lack of) destruction is handled internally.
- egl_cache_t();
- ~egl_cache_t();
-
- // Copying is disallowed.
- egl_cache_t(const egl_cache_t&); // not implemented
- void operator=(const egl_cache_t&); // not implemented
-
- // getBlobCacheLocked returns the BlobCache object being used to store the
- // key/value blob pairs. If the BlobCache object has not yet been created,
- // this will do so, loading the serialized cache contents from disk if
- // possible.
- sp<BlobCache> getBlobCacheLocked();
-
- // saveBlobCache attempts to save the current contents of mBlobCache to
- // disk.
- void saveBlobCacheLocked();
-
- // loadBlobCache attempts to load the saved cache contents from disk into
- // mBlobCache.
- void loadBlobCacheLocked();
-
- // mInitialized indicates whether the egl_cache_t is in the initialized
- // state. It is initialized to false at construction time, and gets set to
- // true when initialize is called. It is set back to false when terminate
- // is called. When in this state, the cache behaves as normal. When not,
- // the getBlob and setBlob methods will return without performing any cache
- // operations.
- bool mInitialized;
-
- // mBlobCache is the cache in which the key/value blob pairs are stored. It
- // is initially NULL, and will be initialized by getBlobCacheLocked the
- // first time it's needed.
- sp<BlobCache> mBlobCache;
-
- // mFilename is the name of the file for storing cache contents in between
- // program invocations. It is initialized to an empty string at
- // construction time, and can be set with the setCacheFilename method. An
- // empty string indicates that the cache should not be saved to or restored
- // 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;
-
- // sCache is the singleton egl_cache_t object.
- static egl_cache_t sCache;
-};
-
-// ----------------------------------------------------------------------------
-}; // namespace android
-// ----------------------------------------------------------------------------
-
-#endif // ANDROID_EGL_CACHE_H