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 |