30a0a7de43
This issue was raised by Brett Wilson while reviewing my changelist for readability. Craig Silverstein (one of C++ SG maintainers) confirmed that we should declare one namespace per line. Our way of namespaces closing seems not violating style guides (there is no clear agreement on it), so I left it intact. Review URL: http://codereview.chromium.org/115756 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2038 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
110 lines
4.6 KiB
C++
110 lines
4.6 KiB
C++
// Copyright 2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_COMPILATION_CACHE_H_
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#define V8_COMPILATION_CACHE_H_
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namespace v8 {
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namespace internal {
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// The compilation cache keeps function boilerplates for compiled
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// scripts and evals. The boilerplates are looked up using the source
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// string as the key.
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class CompilationCache {
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public:
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// The same source code string has different compiled code for
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// scripts and evals. Internally, we use separate caches to avoid
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// getting the wrong kind of entry when looking up.
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enum Entry {
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EVAL_GLOBAL,
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EVAL_CONTEXTUAL,
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REGEXP,
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SCRIPT,
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LAST_ENTRY = SCRIPT
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};
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// Finds the script function boilerplate for a source
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// string. Returns an empty handle if the cache doesn't contain a
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// script for the given source string with the right origin.
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static Handle<JSFunction> LookupScript(Handle<String> source,
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Handle<Object> name,
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int line_offset,
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int column_offset);
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// Finds the function boilerplate for a source string for eval in a
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// given context. Returns an empty handle if the cache doesn't
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// contain a script for the given source string.
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static Handle<JSFunction> LookupEval(Handle<String> source,
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Handle<Context> context,
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Entry entry);
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// Returns the regexp data associated with the given regexp if it
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// is in cache, otherwise an empty handle.
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static Handle<FixedArray> LookupRegExp(Handle<String> source,
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JSRegExp::Flags flags);
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// Associate the (source, kind) pair to the boilerplate. This may
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// overwrite an existing mapping.
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static void PutScript(Handle<String> source,
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Handle<JSFunction> boilerplate);
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// Associate the (source, context->closure()->shared(), kind) triple
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// with the boilerplate. This may overwrite an existing mapping.
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static void PutEval(Handle<String> source,
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Handle<Context> context,
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Entry entry,
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Handle<JSFunction> boilerplate);
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// Associate the (source, flags) pair to the given regexp data.
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// This may overwrite an existing mapping.
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static void PutRegExp(Handle<String> source,
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JSRegExp::Flags flags,
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Handle<FixedArray> data);
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// Clear the cache - also used to initialize the cache at startup.
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static void Clear();
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// GC support.
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static void Iterate(ObjectVisitor* v);
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// Notify the cache that a mark-sweep garbage collection is about to
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// take place. This is used to retire entries from the cache to
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// avoid keeping them alive too long without using them.
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static void MarkCompactPrologue();
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// Enable/disable compilation cache. Used by debugger to disable compilation
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// cache during debugging to make sure new scripts are always compiled.
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static void Enable();
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static void Disable();
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};
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} } // namespace v8::internal
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#endif // V8_COMPILATION_CACHE_H_
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