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Unified Diff: src/compilation-cache.h

Issue 1933: Generalized the EvalCache into a CompilationCache and enabled... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 12 years, 3 months ago
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Index: src/compilation-cache.h
===================================================================
--- src/compilation-cache.h (revision 0)
+++ src/compilation-cache.h (revision 0)
@@ -0,0 +1,85 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// 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.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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 V8_COMPILATION_CACHE_H_
+#define V8_COMPILATION_CACHE_H_
+
+namespace v8 { namespace internal {
+
+
+// The compilation cache keeps function boilerplates for compiled
+// scripts and evals. The boilerplates are looked up using the source
+// string as the key.
+class CompilationCache {
+ public:
+ // The same source code string has different compiled code for
+ // scripts and evals. Internally, we use separate caches to avoid
+ // get the wrong kind of entry when looking up.
Mads Ager (chromium) 2008/09/11 10:47:00 get -> getting
+ enum Entry {
+ SCRIPT,
+ EVAL_GLOBAL,
+ EVAL_CONTEXTUAL
+ };
+
+ // Finds the script function boilerplate for a source
+ // string. Returns an empty handle if the cache doesn't contain a
+ // script for the given source string with the right origin.
+ static Handle<JSFunction> LookupScript(Handle<String> source,
+ Handle<Object> name,
+ int line_offset,
+ int column_offset);
+
+ // Finds the function boilerplate for a source string for
+ // eval. Returns an empty handle if the cache doesn't contain a
+ // script for the given source string.
+ static Handle<JSFunction> LookupEval(Handle<String> source,
+ Entry entry);
+
+ // Associate the (source, kind) pair to the boilerplate. This may
+ // overwrite an existing mapping.
+ static void Associate(Handle<String> source,
+ Entry entry,
+ Handle<JSFunction> boilerplate);
+
+ // Clear the cache - also used to initialize the cache at startup.
+ static void Clear();
+
+ // GC support.
+ static void Iterate(ObjectVisitor* v);
+
+ // Notify the cache that a mark-sweep garbage collection is about to
+ // take place. This is used to retire entries from the cache to
+ // avoid keeping them alive too long without using them. For now, we
+ // just clear the cache but we should consider are more
+ // sophisticated LRU scheme.
+ static void MarkCompactPrologue() { Clear(); }
+};
+
+
+} } // namespace v8::internal
+
+#endif // V8_COMPILATION_CACHE_H_
Property changes on: src/compilation-cache.h
___________________________________________________________________
Added: svn:eol-style
+ native
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