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Diffstat (limited to 'media/omx-plugin/include/ics/utils/SharedBuffer.h')
| -rw-r--r-- | media/omx-plugin/include/ics/utils/SharedBuffer.h | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/media/omx-plugin/include/ics/utils/SharedBuffer.h b/media/omx-plugin/include/ics/utils/SharedBuffer.h deleted file mode 100644 index 24508b0f7..000000000 --- a/media/omx-plugin/include/ics/utils/SharedBuffer.h +++ /dev/null @@ -1,146 +0,0 @@ -/* - * Copyright (C) 2005 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_SHARED_BUFFER_H -#define ANDROID_SHARED_BUFFER_H - -#include <stdint.h> -#include <sys/types.h> - -// --------------------------------------------------------------------------- - -namespace android { - -class SharedBuffer -{ -public: - - /* flags to use with release() */ - enum { - eKeepStorage = 0x00000001 - }; - - /*! allocate a buffer of size 'size' and acquire() it. - * call release() to free it. - */ - static SharedBuffer* alloc(size_t size); - - /*! free the memory associated with the SharedBuffer. - * Fails if there are any users associated with this SharedBuffer. - * In other words, the buffer must have been release by all its - * users. - */ - static ssize_t dealloc(const SharedBuffer* released); - - //! get the SharedBuffer from the data pointer - static inline const SharedBuffer* sharedBuffer(const void* data); - - //! access the data for read - inline const void* data() const; - - //! access the data for read/write - inline void* data(); - - //! get size of the buffer - inline size_t size() const; - - //! get back a SharedBuffer object from its data - static inline SharedBuffer* bufferFromData(void* data); - - //! get back a SharedBuffer object from its data - static inline const SharedBuffer* bufferFromData(const void* data); - - //! get the size of a SharedBuffer object from its data - static inline size_t sizeFromData(const void* data); - - //! edit the buffer (get a writtable, or non-const, version of it) - SharedBuffer* edit() const; - - //! edit the buffer, resizing if needed - SharedBuffer* editResize(size_t size) const; - - //! like edit() but fails if a copy is required - SharedBuffer* attemptEdit() const; - - //! resize and edit the buffer, loose it's content. - SharedBuffer* reset(size_t size) const; - - //! acquire/release a reference on this buffer - void acquire() const; - - /*! release a reference on this buffer, with the option of not - * freeing the memory associated with it if it was the last reference - * returns the previous reference count - */ - int32_t release(uint32_t flags = 0) const; - - //! returns wether or not we're the only owner - inline bool onlyOwner() const; - - -private: - inline SharedBuffer() { } - inline ~SharedBuffer() { } - inline SharedBuffer(const SharedBuffer&); - - // 16 bytes. must be sized to preserve correct alingment. - mutable int32_t mRefs; - size_t mSize; - uint32_t mReserved[2]; -}; - -// --------------------------------------------------------------------------- - -const SharedBuffer* SharedBuffer::sharedBuffer(const void* data) { - return data ? reinterpret_cast<const SharedBuffer *>(data)-1 : 0; -} - -const void* SharedBuffer::data() const { - return this + 1; -} - -void* SharedBuffer::data() { - return this + 1; -} - -size_t SharedBuffer::size() const { - return mSize; -} - -SharedBuffer* SharedBuffer::bufferFromData(void* data) -{ - return ((SharedBuffer*)data)-1; -} - -const SharedBuffer* SharedBuffer::bufferFromData(const void* data) -{ - return ((const SharedBuffer*)data)-1; -} - -size_t SharedBuffer::sizeFromData(const void* data) -{ - return (((const SharedBuffer*)data)-1)->mSize; -} - -bool SharedBuffer::onlyOwner() const { - return (mRefs == 1); -} - -}; // namespace android - -// --------------------------------------------------------------------------- - -#endif // ANDROID_VECTOR_H |