GN threading refactor

tools/gn/target_generator.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TOOLS_GN_TARGET_GENERATOR_H_
 #define TOOLS_GN_TARGET_GENERATOR_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "tools/gn/source_dir.h"
 #include "tools/gn/target.h"
 
 class BuildSettings;
 class Err;
+class FunctionCallNode;
 class Location;
 class Scope;
-class Token;
 class Value;
 
 // Fills the variables in a Target object from a Scope (the result of a script
 // execution). Target-type-specific derivations of this class will be used
 // for each different type of function call. This class implements the common
 // behavior.
 class TargetGenerator {
  public:
   TargetGenerator(Target* target,
                   Scope* scope,
-                  const Token& function_token,
+                  const FunctionCallNode* function_call,
                   Err* err);
   ~TargetGenerator();
 
   void Run();
 
-  // The function token is the token of the function name of the generator for
-  // this target. err() will be set on failure.
+  // The function call is the parse tree node that invoked the target.
+  // err() will be set on failure.
   static void GenerateTarget(Scope* scope,
-                             const Token& function_token,
+                             const FunctionCallNode* function_call,
                              const std::vector<Value>& args,
                              const std::string& output_type,
                              Err* err);
 
  protected:
   // Derived classes implement this to do type-specific generation.
   virtual void DoRun() = 0;
 
   const BuildSettings* GetBuildSettings() const;
 
   void FillSources();
   void FillSourcePrereqs();
   void FillConfigs();
   void FillExternal();
   void FillOutputs();
 
-  // Sets the current toolchain as a dependecy of this target. All targets with
-  // a dependency on the toolchain should call this function.
-  void SetToolchainDependency();
-
   Target* target_;
   Scope* scope_;
-  const Token& function_token_;
+  const FunctionCallNode* function_call_;
   Err* err_;
 
  private:
   void FillDependentConfigs();  // Includes all types of dependent configs.
   void FillData();
   void FillDependencies();  // Includes data dependencies.
   void FillGypFile();
   void FillHardDep();
 
   // Reads configs/deps from the given var name, and uses the given setting on
   // the target to save them.
   void FillGenericConfigs(const char* var_name, LabelConfigVector* dest);
   void FillGenericDeps(const char* var_name, LabelTargetVector* dest);
 
   void FillForwardDependentConfigs();
 
   DISALLOW_COPY_AND_ASSIGN(TargetGenerator);
 };
 
 #endif  // TOOLS_GN_TARGET_GENERATOR_H_