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author | Steve Block <steveblock@google.com> | 2011-05-13 06:44:40 -0700 |
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committer | Android (Google) Code Review <android-gerrit@google.com> | 2011-05-13 06:44:40 -0700 |
commit | 08014c20784f3db5df3a89b73cce46037b77eb59 (patch) | |
tree | 47749210d31e19e6e2f64036fa8fae2ad693476f /Source/JavaScriptCore/wtf/text/StringStatics.cpp | |
parent | 860220379e56aeb66424861ad602b07ee22b4055 (diff) | |
parent | 4c3661f7918f8b3f139f824efb7855bedccb4c94 (diff) | |
download | external_webkit-08014c20784f3db5df3a89b73cce46037b77eb59.zip external_webkit-08014c20784f3db5df3a89b73cce46037b77eb59.tar.gz external_webkit-08014c20784f3db5df3a89b73cce46037b77eb59.tar.bz2 |
Merge changes Ide388898,Ic49f367c,I1158a808,Iacb6ca5d,I2100dd3a,I5c1abe54,Ib0ef9902,I31dbc523,I570314b3
* changes:
Merge WebKit at r75315: Update WebKit version
Merge WebKit at r75315: Add FrameLoaderClient PageCache stubs
Merge WebKit at r75315: Stub out AXObjectCache::remove()
Merge WebKit at r75315: Fix ImageBuffer
Merge WebKit at r75315: Fix PluginData::initPlugins()
Merge WebKit at r75315: Fix conflicts
Merge WebKit at r75315: Fix Makefiles
Merge WebKit at r75315: Move Android-specific WebCore files to Source
Merge WebKit at r75315: Initial merge by git.
Diffstat (limited to 'Source/JavaScriptCore/wtf/text/StringStatics.cpp')
-rw-r--r-- | Source/JavaScriptCore/wtf/text/StringStatics.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/wtf/text/StringStatics.cpp b/Source/JavaScriptCore/wtf/text/StringStatics.cpp new file mode 100644 index 0000000..5654044 --- /dev/null +++ b/Source/JavaScriptCore/wtf/text/StringStatics.cpp @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2010 Apple Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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 APPLE INC. ``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 APPLE INC. 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. + */ + +#include "config.h" + +#ifdef SKIP_STATIC_CONSTRUCTORS_ON_GCC +#define ATOMICSTRING_HIDE_GLOBALS 1 +#endif + +#include "AtomicString.h" +#include "StaticConstructors.h" +#include "StringImpl.h" + +namespace WTF { + +StringImpl* StringImpl::empty() +{ + // FIXME: This works around a bug in our port of PCRE, that a regular expression + // run on the empty string may still perform a read from the first element, and + // as such we need this to be a valid pointer. No code should ever be reading + // from a zero length string, so this should be able to be a non-null pointer + // into the zero-page. + // Replace this with 'reinterpret_cast<UChar*>(static_cast<intptr_t>(1))' once + // PCRE goes away. + static UChar emptyUCharData = 0; + DEFINE_STATIC_LOCAL(StringImpl, emptyString, (&emptyUCharData, 0, ConstructStaticString)); + return &emptyString; +} + +JS_EXPORTDATA DEFINE_GLOBAL(AtomicString, nullAtom) +JS_EXPORTDATA DEFINE_GLOBAL(AtomicString, emptyAtom, "") +JS_EXPORTDATA DEFINE_GLOBAL(AtomicString, textAtom, "#text") +JS_EXPORTDATA DEFINE_GLOBAL(AtomicString, commentAtom, "#comment") +JS_EXPORTDATA DEFINE_GLOBAL(AtomicString, starAtom, "*") +JS_EXPORTDATA DEFINE_GLOBAL(AtomicString, xmlAtom, "xml") +JS_EXPORTDATA DEFINE_GLOBAL(AtomicString, xmlnsAtom, "xmlns") + +void AtomicString::init() +{ + static bool initialized; + if (!initialized) { + // Initialization is not thread safe, so this function must be called from the main thread first. + ASSERT(isMainThread()); + + // Use placement new to initialize the globals. + new ((void*)&nullAtom) AtomicString; + new ((void*)&emptyAtom) AtomicString(""); + new ((void*)&textAtom) AtomicString("#text"); + new ((void*)&commentAtom) AtomicString("#comment"); + new ((void*)&starAtom) AtomicString("*"); + new ((void*)&xmlAtom) AtomicString("xml"); + new ((void*)&xmlnsAtom) AtomicString("xmlns"); + + initialized = true; + } +} + +} |