JavaScriptCore:
2009-05-25 David Levin <[email protected]>
Reviewed by Maciej Stachowiak and Oliver Hunt.
https://bugs.webkit.org/show_bug.cgi?id=25126
Allow the buffer underlying UString to be shared.
In order to not grow the underlying size of any structure,
there is a union in the Rep string which holds
+ m_sharedBuffer -- a pointer to the shared ref counted buffer
if the class is BaseString and the buffer is being shared OR
+ m_baseString -- the BaseString if the class is only UString::Rep
but not a UString::BaseString
Ideally, m_sharedBuffer would be a RefPtr, but it cannot be because
it is in a union.
No change in sunspider perf.
- JavaScriptCore.vcproj/WTF/WTF.vcproj:
- JavaScriptCore.xcodeproj/project.pbxproj:
- runtime/UString.cpp:
(JSC::UString::Rep::share):
(JSC::UString::Rep::destroy):
(JSC::UString::BaseString::sharedBuffer):
(JSC::UString::BaseString::setSharedBuffer):
(JSC::UString::BaseString::slowIsBufferReadOnly):
(JSC::expandCapacity):
(JSC::UString::Rep::reserveCapacity):
(JSC::UString::expandPreCapacity):
(JSC::concatenate):
(JSC::UString::append):
- runtime/UString.h:
(JSC::UString::Rep::Rep):
(JSC::UString::Rep::):
(JSC::UString::BaseString::isShared):
(JSC::UString::BaseString::isBufferReadOnly):
(JSC::UString::Rep::baseString):
- wtf/CrossThreadRefCounted.h:
(WTF::CrossThreadRefCounted::isShared):
- wtf/OwnFastMallocPtr.h: Added.
(WTF::OwnFastMallocPtr::OwnFastMallocPtr):
(WTF::OwnFastMallocPtr::~OwnFastMallocPtr):
(WTF::OwnFastMallocPtr::get):
(WTF::OwnFastMallocPtr::release):
JavaScriptGlue:
2009-05-25 David Levin <[email protected]>
Reviewed by Maciej Stachowiak and Oliver Hunt.
https://bugs.webkit.org/show_bug.cgi?id=25126
Added forwarding headers.
- ForwardingHeaders/wtf/CrossThreadRefCounted.h: Added.
- ForwardingHeaders/wtf/OwnFastMallocPtr.h: Added.
WebCore:
2009-05-25 David Levin <[email protected]>
Reviewed by Maciej Stachowiak and Oliver Hunt.
Added forwarding headers.
- ForwardingHeaders/wtf/CrossThreadRefCounted.h: Added.
- ForwardingHeaders/wtf/OwnFastMallocPtr.h: Added.
