tesseract  3.03
/usr/local/google/home/jbreiden/tesseract-ocr-read-only/dict/dawg_cache.h
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00001 
00002 // File:        dawg_cache.h
00003 // Description: A class that knows about loading and caching dawgs.
00004 // Author:      David Eger
00005 // Created:     Fri Jan 27 12:08:00 PST 2012
00006 //
00007 // (C) Copyright 2012, Google Inc.
00008 // Licensed under the Apache License, Version 2.0 (the "License");
00009 // you may not use this file except in compliance with the License.
00010 // You may obtain a copy of the License at
00011 // http://www.apache.org/licenses/LICENSE-2.0
00012 // Unless required by applicable law or agreed to in writing, software
00013 // distributed under the License is distributed on an "AS IS" BASIS,
00014 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00015 // See the License for the specific language governing permissions and
00016 // limitations under the License.
00017 //
00019 
00020 #ifndef TESSERACT_DICT_DAWG_CACHE_H_
00021 #define TESSERACT_DICT_DAWG_CACHE_H_
00022 
00023 #include "dawg.h"
00024 #include "object_cache.h"
00025 #include "strngs.h"
00026 #include "tessdatamanager.h"
00027 
00028 namespace tesseract {
00029 
00030 class DawgCache {
00031  public:
00032   Dawg *GetSquishedDawg(
00033       const STRING &lang,
00034       const char *data_file_name,
00035       TessdataType tessdata_dawg_type,
00036       int debug_level);
00037 
00038   // If we manage the given dawg, decrement its count,
00039   // and possibly delete it if the count reaches zero.
00040   // If dawg is unknown to us, return false.
00041   bool FreeDawg(Dawg *dawg) {
00042     return dawgs_.Free(dawg);
00043   }
00044 
00045   // Free up any currently unused dawgs.
00046   void DeleteUnusedDawgs() {
00047     dawgs_.DeleteUnusedObjects();
00048   }
00049 
00050  private:
00051   ObjectCache<Dawg> dawgs_;
00052 };
00053 
00054 }  // namespace tesseract
00055 
00056 #endif  // TESSERACT_DICT_DAWG_CACHE_H_
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