diff options
Diffstat (limited to 'src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h')
-rw-r--r-- | src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h | 82 |
1 files changed, 74 insertions, 8 deletions
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h b/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h index 66c8529abe..2fd4fc1410 100644 --- a/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h +++ b/src/3rdparty/javascriptcore/JavaScriptCore/parser/ParserArena.h @@ -26,35 +26,101 @@ #ifndef ParserArena_h #define ParserArena_h -#include <wtf/PassRefPtr.h> -#include <wtf/RefPtr.h> -#include <wtf/Vector.h> +#include "Identifier.h" +#include <wtf/SegmentedVector.h> namespace JSC { class ParserArenaDeletable; class ParserArenaRefCounted; - class ParserArena { + class IdentifierArena { public: + ALWAYS_INLINE const Identifier& makeIdentifier(JSGlobalData*, const UChar* characters, size_t length); + const Identifier& makeNumericIdentifier(JSGlobalData*, double number); + + void clear() { m_identifiers.clear(); } + bool isEmpty() const { return m_identifiers.isEmpty(); } + + private: + typedef SegmentedVector<Identifier, 64> IdentifierVector; + IdentifierVector m_identifiers; + }; + + ALWAYS_INLINE const Identifier& IdentifierArena::makeIdentifier(JSGlobalData* globalData, const UChar* characters, size_t length) + { + m_identifiers.append(Identifier(globalData, characters, length)); + return m_identifiers.last(); + } + + inline const Identifier& IdentifierArena::makeNumericIdentifier(JSGlobalData* globalData, double number) + { + m_identifiers.append(Identifier(globalData, UString::from(number))); + return m_identifiers.last(); + } + + class ParserArena : Noncopyable { + public: + ParserArena(); + ~ParserArena(); + void swap(ParserArena& otherArena) { + std::swap(m_freeableMemory, otherArena.m_freeableMemory); + std::swap(m_freeablePoolEnd, otherArena.m_freeablePoolEnd); + m_identifierArena.swap(otherArena.m_identifierArena); + m_freeablePools.swap(otherArena.m_freeablePools); m_deletableObjects.swap(otherArena.m_deletableObjects); m_refCountedObjects.swap(otherArena.m_refCountedObjects); } - ~ParserArena(); - void deleteWithArena(ParserArenaDeletable* object) { m_deletableObjects.append(object); } - void derefWithArena(PassRefPtr<ParserArenaRefCounted> object) { m_refCountedObjects.append(object); } + void* allocateFreeable(size_t size) + { + ASSERT(size); + ASSERT(size <= freeablePoolSize); + size_t alignedSize = alignSize(size); + ASSERT(alignedSize <= freeablePoolSize); + if (UNLIKELY(static_cast<size_t>(m_freeablePoolEnd - m_freeableMemory) < alignedSize)) + allocateFreeablePool(); + void* block = m_freeableMemory; + m_freeableMemory += alignedSize; + return block; + } + + void* allocateDeletable(size_t size) + { + ParserArenaDeletable* deletable = static_cast<ParserArenaDeletable*>(fastMalloc(size)); + m_deletableObjects.append(deletable); + return deletable; + } + void derefWithArena(PassRefPtr<ParserArenaRefCounted>); bool contains(ParserArenaRefCounted*) const; ParserArenaRefCounted* last() const; void removeLast(); - bool isEmpty() const { return m_deletableObjects.isEmpty() && m_refCountedObjects.isEmpty(); } + bool isEmpty() const; void reset(); + IdentifierArena& identifierArena() { return *m_identifierArena; } + private: + static const size_t freeablePoolSize = 8000; + + static size_t alignSize(size_t size) + { + return (size + sizeof(WTF::AllocAlignmentInteger) - 1) & ~(sizeof(WTF::AllocAlignmentInteger) - 1); + } + + void* freeablePool(); + void allocateFreeablePool(); + void deallocateObjects(); + + char* m_freeableMemory; + char* m_freeablePoolEnd; + + OwnPtr<IdentifierArena> m_identifierArena; + Vector<void*> m_freeablePools; Vector<ParserArenaDeletable*> m_deletableObjects; Vector<RefPtr<ParserArenaRefCounted> > m_refCountedObjects; }; |