libbase/sharedlib.h

   1 //
   2 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
   3 //   Foundation, Inc
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18
  19 #ifndef GNASH_SHAREDLIB_H
  20 #define GNASH_SHAREDLIB_H
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "gnashconfig.h"
  24 #endif
  25
  26 #include <boost/thread/mutex.hpp>
  27 #include <string>
  28 #include "dsodefs.h" // DSOEXPORT
  29
  30 #ifdef _WIN32
  31 #undef DLL_EXPORT
  32 #define LIBLTDL_DLL_IMPORT 1
  33 #endif
  34
  35 #include <ltdl.h>
  36
  37 // Used on Darwin for basename
  38 #ifdef HAVE_LIBGEN_H
  39 #include <libgen.h>
  40 #endif
  41
  42 namespace gnash {
  43     class as_object;
  44 }
  45
  46 namespace gnash {
  47
  48 /// TODO: document this class
  49 class SharedLib
  50 {
  51     typedef boost::mutex::scoped_lock scoped_lock;
  52
  53 public:
  54     // Typedefs for function pointers to keep the code readable
  55     typedef bool entrypoint (void *obj);
  56     typedef void initentry(as_object &obj);
  57
  58     SharedLib(const std::string& filespec);
  59     DSOEXPORT SharedLib(const std::string& filespec, const std::string& envvar);
  60     ~SharedLib();
  61
  62     DSOEXPORT bool openLib();
  63     bool openLib(const std::string &filespec);
  64
  65     // Get a C symbol from the shared library based on the name
  66     entrypoint *getDllSymbol (const std::string& symbol);
  67     DSOEXPORT initentry *getInitEntry (const std::string& symbol);
  68
  69 private:
  70
  71     bool closeLib();
  72
  73     lt_dlhandle _dlhandle;
  74     std::string _filespec;
  75     boost::mutex _libMutex;
  76 };
  77
  78 } // end of gnash namespace
  79
  80 // GNASH_SHAREDLIB_H
  81 #endif
  82
  83 // Local Variables:
  84 // mode: C++
  85 // indent-tabs-mode: t
  86 // End: