src/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 class 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.
  22 struct 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
  51 class 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_