gin/modules/file_module_provider.h

   1 // Copyright 2013 The Chromium 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 GIN_MODULES_FILE_MODULE_PROVIDER_H_
   6 #define GIN_MODULES_FILE_MODULE_PROVIDER_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/files/file_path.h"
  13 #include "gin/gin_export.h"
  14 #include "gin/runner.h"
  15
  16 namespace gin {
  17
  18 // FileModuleProvider knows how to load AMD modules off disk. It searches for
  19 // modules in the directories indiciated by |search_paths|. Although we still
  20 // read from the file system on the main thread, we'll eventually want to move
  21 // the reads to a background thread.
  22 class GIN_EXPORT FileModuleProvider {
  23  public:
  24   explicit FileModuleProvider(
  25       const std::vector<base::FilePath>& search_paths);
  26   ~FileModuleProvider();
  27
  28   // Searches for modules with |ids| in the file system. If found, the modules
  29   // will be executed asynchronously by |runner|.
  30   void AttempToLoadModules(Runner* runner, const std::set<std::string>& ids);
  31
  32  private:
  33   std::vector<base::FilePath> search_paths_;
  34
  35   // We'll only search for a given module once. We remember the set of modules
  36   // we've already looked for in |attempted_ids_|.
  37   std::set<std::string> attempted_ids_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(FileModuleProvider);
  40 };
  41
  42 }  // namespace gin
  43
  44 #endif  // GIN_MODULES_FILE_MODULE_PROVIDER_H_