00001 00005 /* 00006 * Author: Steven Ludtke, 04/10/2003 (sludtke@bcm.edu) 00007 * Copyright (c) 2000-2006 Baylor College of Medicine 00008 * 00009 * This software is issued under a joint BSD/GNU license. You may use the 00010 * source code in this file under either license. However, note that the 00011 * complete EMAN2 and SPARX software packages have some GPL dependencies, 00012 * so you are responsible for compliance with the licenses of these packages 00013 * if you opt to use BSD licensing. The warranty disclaimer below holds 00014 * in either instance. 00015 * 00016 * This complete copyright notice must be included in any revised version of the 00017 * source code. Additional authorship citations may be added, but existing 00018 * author citations must be preserved. 00019 * 00020 * This program is free software; you can redistribute it and/or modify 00021 * it under the terms of the GNU General Public License as published by 00022 * the Free Software Foundation; either version 2 of the License, or 00023 * (at your option) any later version. 00024 * 00025 * This program is distributed in the hope that it will be useful, 00026 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00027 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00028 * GNU General Public License for more details. 00029 * 00030 * You should have received a copy of the GNU General Public License 00031 * along with this program; if not, write to the Free Software 00032 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00033 * 00034 * */ 00035 00036 #include "emcache.h" 00037 #include "imageio.h" 00038 #include "util.h" 00039 00040 #ifdef WIN32 00041 #define access _access 00042 #define F_OK 00 00043 #else 00044 #include <unistd.h> 00045 #endif 00046 00047 00048 using namespace EMAN; 00049 00050 GlobalCache *GlobalCache::global_cache = 0; 00051 00052 GlobalCache::GlobalCache() 00053 { 00054 imageio_cache = new EMCache < ImageIO > (8); 00055 } 00056 00057 GlobalCache::GlobalCache(const GlobalCache &) 00058 { 00059 } 00060 00061 GlobalCache::~GlobalCache() 00062 { 00063 if(imageio_cache) 00064 { 00065 delete imageio_cache; 00066 imageio_cache = 0; 00067 } 00068 } 00069 00070 00071 GlobalCache *GlobalCache::instance() 00072 { 00073 if (!global_cache) { 00074 global_cache = new GlobalCache(); 00075 } 00076 return global_cache; 00077 } 00078 00079 ImageIO *GlobalCache::get_imageio(const string & filename, int rw_mode) 00080 { 00081 ImageIO *io = imageio_cache->get(filename); 00082 if (io) { 00083 bool need_remove = false; 00084 00085 int old_rw = file_rw_dict[filename]; 00086 00087 if (rw_mode == ImageIO::READ_ONLY) { 00088 if (old_rw == ImageIO::WRITE_ONLY) { 00089 need_remove = true; 00090 } 00091 } 00092 else if (rw_mode != old_rw) { 00093 need_remove = true; 00094 } 00095 else { 00096 if (!Util::is_file_exist(filename)) { 00097 need_remove = true; 00098 } 00099 } 00100 if (need_remove) { 00101 imageio_cache->remove(filename); 00102 io = 0; 00103 } 00104 } 00105 00106 return io; 00107 } 00108 00109 00110 void GlobalCache::add_imageio(const string & filename, int rw_mode, ImageIO * io) 00111 { 00112 if (io) { 00113 file_rw_dict[filename] = rw_mode; 00114 imageio_cache->add(filename, io); 00115 } 00116 } 00117