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Diffstat (limited to 'Source/WebCore/platform/graphics/android/utils/LinearAllocator.h')
-rw-r--r-- | Source/WebCore/platform/graphics/android/utils/LinearAllocator.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/utils/LinearAllocator.h b/Source/WebCore/platform/graphics/android/utils/LinearAllocator.h new file mode 100644 index 0000000..1f3265c --- /dev/null +++ b/Source/WebCore/platform/graphics/android/utils/LinearAllocator.h @@ -0,0 +1,61 @@ +/* + * Copyright 2012, The Android Open Source Project + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef LinearAllocator_h +#define LinearAllocator_h + +namespace WebCore { + +class LinearAllocator +{ +public: + LinearAllocator(size_t averageAllocSize = 0); + ~LinearAllocator(); + + void* alloc(size_t size); + void rewindTo(void*); + +private: + LinearAllocator(const LinearAllocator& other); + + class Page; + + Page* newPage(); + void ensureNext(size_t size); + void* start(Page *p); + void* end(Page* p); + + unsigned memusage(); + + size_t m_pageSize; + size_t m_maxAllocSize; + void* m_next; + Page* m_currentPage; + Page* m_pages; +}; + +} // namespace WebCore + +#endif // LinearAllocator_h |