[SCM] WebKit Debian packaging branch, webkit-1.2, updated. upstream/1.1.90-6072-g9a69373

[ggaren at apple.com]

The following commit has been merged in the webkit-1.2 branch:
commit 4664c47dcb6f22d62faa81accdf82bfce49de5a7
Author: ggaren at apple.com <ggaren at apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Date:   Tue Oct 27 22:04:47 2009 +0000

    Build fix: re-readded this file.
    
    Patch by Geoffrey Garen <ggaren at apple.com> on 2009-10-27
    * runtime/DateInstanceCache.h: Added.
    (JSC::DateInstanceData::create):
    (JSC::DateInstanceData::DateInstanceData):
    (JSC::DateInstanceCache::DateInstanceCache):
    (JSC::DateInstanceCache::add):
    (JSC::DateInstanceCache::lookup):
    
    
    
    git-svn-id: http://svn.webkit.org/repository/webkit/trunk@50175 268f45cc-cd09-0410-ab3c-d52691b4dbfc

diff --git a/JavaScriptCore/ChangeLog b/JavaScriptCore/ChangeLog
index c534753..7fe01a7 100644
--- a/JavaScriptCore/ChangeLog
+++ b/JavaScriptCore/ChangeLog
@@ -1,5 +1,16 @@
 2009-10-27  Geoffrey Garen  <ggaren at apple.com>
 
+        Build fix: re-readded this file.
+
+        * runtime/DateInstanceCache.h: Added.
+        (JSC::DateInstanceData::create):
+        (JSC::DateInstanceData::DateInstanceData):
+        (JSC::DateInstanceCache::DateInstanceCache):
+        (JSC::DateInstanceCache::add):
+        (JSC::DateInstanceCache::lookup):
+
+2009-10-27  Geoffrey Garen  <ggaren at apple.com>
+
         Reviewed by Darin Adler and Oliver Hunt.
 
         https://bugs.webkit.org/show_bug.cgi?id=30800
diff --git a/JavaScriptCore/runtime/DateInstanceCache.h b/JavaScriptCore/runtime/DateInstanceCache.h
new file mode 100644
index 0000000..b626c1d
--- /dev/null
+++ b/JavaScriptCore/runtime/DateInstanceCache.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+
+#ifndef DateInstanceCache_h
+#define DateInstanceCache_h
+
+#include <wtf/DateMath.h>
+#include <wtf/HashFunctions.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace JSC {
+
+    extern const double NaN;
+
+    class DateInstanceData : public RefCounted<DateInstanceData> {
+    public:
+        static PassRefPtr<DateInstanceData> create() { return adoptRef(new DateInstanceData); }
+
+        double m_gregorianDateTimeCachedForMS;
+        WTF::GregorianDateTime m_cachedGregorianDateTime;
+        double m_gregorianDateTimeUTCCachedForMS;
+        WTF::GregorianDateTime m_cachedGregorianDateTimeUTC;
+
+    private:
+        DateInstanceData()
+            : m_gregorianDateTimeCachedForMS(NaN)
+            , m_gregorianDateTimeUTCCachedForMS(NaN)
+        {
+        }
+    };
+
+    class DateInstanceCache {
+    public:
+        DateInstanceCache()
+        {
+            for (size_t i = 0; i < cacheSize; ++i)
+                m_cache[i].key = NaN;
+        }
+        
+        DateInstanceData* add(double d)
+        {
+            CacheEntry& entry = lookup(d);
+            if (d == entry.key)
+                return entry.value.get();
+
+            entry.key = d;
+            entry.value = DateInstanceData::create();
+            return entry.value.get();
+        }
+
+    private:
+        static const size_t cacheSize = 64;
+
+        struct CacheEntry {
+            double key;
+            RefPtr<DateInstanceData> value;
+        };
+
+        CacheEntry& lookup(double d) { return m_cache[WTF::FloatHash<double>::hash(d) & (cacheSize - 1)]; }
+
+        CacheEntry m_cache[cacheSize];
+    };
+
+} // namespace JSC
+
+#endif // DateInstanceCache_h

-- 
WebKit Debian packaging