Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/input_file_manager.h

Index: trunk/src/tools/gn/input_file_manager.h
===================================================================
--- trunk/src/tools/gn/input_file_manager.h	(revision 214322)
+++ trunk/src/tools/gn/input_file_manager.h	(working copy)
@@ -1,123 +0,0 @@
-// 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_INPUT_FILE_MANAGER_H_
-#define TOOLS_GN_INPUT_FILE_MANAGER_H_
-
-#include <set>
-#include <utility>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/containers/hash_tables.h"
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "base/synchronization/lock.h"
-#include "base/synchronization/waitable_event.h"
-#include "tools/gn/build_settings.h"
-#include "tools/gn/input_file.h"
-#include "tools/gn/parse_tree.h"
-#include "tools/gn/settings.h"
-
-class Err;
-class LocationRange;
-class ParseNode;
-class Token;
-
-// Manages loading and parsing files from disk. This doesn't actually have
-// any context for executing the results, so potentially multiple configs
-// could use the same input file (saving parsing).
-//
-// This class is threadsafe.
-//
-// InputFile objects must never be deleted while the program is running since
-// various state points into them.
-class InputFileManager : public base::RefCountedThreadSafe<InputFileManager> {
- public:
-  // Callback issued when a file is laoded. On auccess, the parse node will
-  // refer to the root block of the file. On failure, this will be NULL.
-  typedef base::Callback<void(const ParseNode*)> FileLoadCallback;
-
-  InputFileManager();
-
-  // Loads the given file and executes the callback on the worker pool.
-  //
-  // There are two types of errors. For errors known synchronously, the error
-  // will be set, it will return false, and no work will be scheduled.
-  //
-  // For parse errors and such that happen in the future, the error will be
-  // logged to the scheduler and the callback will be invoked with a null
-  // ParseNode pointer. The given |origin| will be blamed for the invocation.
-  bool AsyncLoadFile(const LocationRange& origin,
-                     const BuildSettings* build_settings,
-                     const SourceFile& file_name,
-                     const FileLoadCallback& callback,
-                     Err* err);
-
-  // Loads and parses the given file synchronously, returning the root block
-  // corresponding to the parsed result. On error, return NULL and the given
-  // Err is set.
-  const ParseNode* SyncLoadFile(const LocationRange& origin,
-                                const BuildSettings* build_settings,
-                                const SourceFile& file_name,
-                                Err* err);
-
-  int GetInputFileCount() const;
-
-  void GetAllInputFileNames(std::vector<SourceFile>* result) const;
-
- private:
-  friend class base::RefCountedThreadSafe<InputFileManager>;
-
-  struct InputFileData {
-    InputFileData(const SourceFile& file_name);
-    ~InputFileData();
-
-    // Don't touch this outside the lock until it's marked loaded.
-    InputFile file;
-
-    bool loaded;
-
-    bool sync_invocation;
-
-    // Lists all invocations that need to be executed when the file completes
-    // loading.
-    std::vector<FileLoadCallback> scheduled_callbacks;
-
-    // Event to signal when the load is complete (or fails). This is lazily
-    // created only when a thread is synchronously waiting for this load (which
-    // only happens for imports).
-    scoped_ptr<base::WaitableEvent> completion_event;
-
-    std::vector<Token> tokens;
-
-    // Null before the file is loaded or if loading failed.
-    scoped_ptr<ParseNode> parsed_root;
-  };
-
-  virtual ~InputFileManager();
-
-  void BackgroundLoadFile(const LocationRange& origin,
-                          const BuildSettings* build_settings,
-                          const SourceFile& name,
-                          InputFile* file);
-
-  // Loads the given file. On error, sets the Err and return false.
-  bool LoadFile(const LocationRange& origin,
-                const BuildSettings* build_settings,
-                const SourceFile& name,
-                InputFile* file,
-                Err* err);
-
-  mutable base::Lock lock_;
-
-  // Maps repo-relative filenames to the corresponding owned pointer.
-  typedef base::hash_map<SourceFile, InputFileData*> InputFileMap;
-  InputFileMap input_files_;
-
-  DISALLOW_COPY_AND_ASSIGN(InputFileManager);
-};
-
-#endif  // TOOLS_GN_INPUT_FILE_MANAGER_H_