Chromium Code Reviews| 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 |