1// Copyright 2014 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_BACKGROUND_PARSING_TASK_H_
6#define V8_BACKGROUND_PARSING_TASK_H_
7
8#include "src/base/platform/platform.h"
9#include "src/base/platform/semaphore.h"
10#include "src/compiler.h"
11#include "src/parser.h"
12#include "src/smart-pointers.h"
13
14namespace v8 {
15namespace internal {
16
17class Parser;
18
19// Internal representation of v8::ScriptCompiler::StreamedSource. Contains all
20// data which needs to be transmitted between threads for background parsing,
21// finalizing it on the main thread, and compiling on the main thread.
22struct StreamedSource {
23  StreamedSource(ScriptCompiler::ExternalSourceStream* source_stream,
24                 ScriptCompiler::StreamedSource::Encoding encoding)
25      : source_stream(source_stream),
26        encoding(encoding),
27        hash_seed(0),
28        allow_lazy(false) {}
29
30  // Internal implementation of v8::ScriptCompiler::StreamedSource.
31  SmartPointer<ScriptCompiler::ExternalSourceStream> source_stream;
32  ScriptCompiler::StreamedSource::Encoding encoding;
33  SmartPointer<ScriptCompiler::CachedData> cached_data;
34
35  // Data needed for parsing, and data needed to to be passed between thread
36  // between parsing and compilation. These need to be initialized before the
37  // compilation starts.
38  UnicodeCache unicode_cache;
39  SmartPointer<CompilationInfo> info;
40  uint32_t hash_seed;
41  bool allow_lazy;
42  SmartPointer<Parser> parser;
43
44 private:
45  // Prevent copying. Not implemented.
46  StreamedSource(const StreamedSource&);
47  StreamedSource& operator=(const StreamedSource&);
48};
49
50
51class BackgroundParsingTask : public ScriptCompiler::ScriptStreamingTask {
52 public:
53  BackgroundParsingTask(StreamedSource* source,
54                        ScriptCompiler::CompileOptions options, int stack_size,
55                        Isolate* isolate);
56
57  virtual void Run();
58
59 private:
60  StreamedSource* source_;  // Not owned.
61  ScriptCompiler::CompileOptions options_;
62  int stack_size_;
63};
64}
65}  // namespace v8::internal
66
67#endif  // V8_BACKGROUND_PARSING_TASK_H_
68