deps/v8/src/background-parsing-task.h

   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
  14 namespace v8 {
  15 namespace internal {
  16
  17 // Internal representation of v8::ScriptCompiler::StreamedSource. Contains all
  18 // data which needs to be transmitted between threads for background parsing,
  19 // finalizing it on the main thread, and compiling on the main thread.
  20 struct StreamedSource {
  21   StreamedSource(ScriptCompiler::ExternalSourceStream* source_stream,
  22                  ScriptCompiler::StreamedSource::Encoding encoding)
  23       : source_stream(source_stream), encoding(encoding) {}
  24
  25   // Internal implementation of v8::ScriptCompiler::StreamedSource.
  26   SmartPointer<ScriptCompiler::ExternalSourceStream> source_stream;
  27   ScriptCompiler::StreamedSource::Encoding encoding;
  28   SmartPointer<ScriptCompiler::CachedData> cached_data;
  29
  30   // Data needed for parsing, and data needed to to be passed between thread
  31   // between parsing and compilation. These need to be initialized before the
  32   // compilation starts.
  33   UnicodeCache unicode_cache;
  34   SmartPointer<Zone> zone;
  35   SmartPointer<ParseInfo> info;
  36   SmartPointer<Parser> parser;
  37
  38  private:
  39   // Prevent copying. Not implemented.
  40   StreamedSource(const StreamedSource&);
  41   StreamedSource& operator=(const StreamedSource&);
  42 };
  43
  44
  45 class BackgroundParsingTask : public ScriptCompiler::ScriptStreamingTask {
  46  public:
  47   BackgroundParsingTask(StreamedSource* source,
  48                         ScriptCompiler::CompileOptions options, int stack_size,
  49                         Isolate* isolate);
  50
  51   virtual void Run();
  52
  53  private:
  54   StreamedSource* source_;  // Not owned.
  55   int stack_size_;
  56 };
  57 }
  58 }  // namespace v8::internal
  59
  60 #endif  // V8_BACKGROUND_PARSING_TASK_H_