Loading libraries during run-time. More...

#include <dl_wrapper.h>

Public Member Functions
	DlWrapper ()

virtual	~DlWrapper ()

int	openLibraries (const std::string &directory, const std::string &pattern="")

bool	openLibrary (const std::string &filename)

void	clear ()

Protected Attributes
std::vector< std::string >	_filenames

Private Member Functions
	DlWrapper (const DlWrapper &)

DlWrapper &	operator= (const DlWrapper &)

Detailed Description

Loading libraries during run-time.

Definition at line 46 of file dl_wrapper.h.

Constructor & Destructor Documentation

◆ DlWrapper() [1/2]

g2o::DlWrapper::DlWrapper ( )

Definition at line 57 of file dl_wrapper.cpp.

57{}

◆ ~DlWrapper()

g2o::DlWrapper::~DlWrapper ( )

virtual

Definition at line 59 of file dl_wrapper.cpp.

                      {
  // clear();
}

◆ DlWrapper() [2/2]

g2o::DlWrapper::DlWrapper ( const DlWrapper & )

private

it's not allowed to draw a copy of the wrapper

Member Function Documentation

◆ clear()

void g2o::DlWrapper::clear ( )

free all loaded libs, i.e., call dlclose()

Definition at line 101 of file dl_wrapper.cpp.

                      {
#if defined(UNIX) || defined(CYGWIN)
  for (size_t i = 0; i < _handles.size(); ++i) {
    dlclose(_handles[i]);
  }
#elif defined(WINDOWS)
  for (size_t i = 0; i < _handles.size(); ++i) {
    FreeLibrary(_handles[i]);
  }
#endif
  _filenames.clear();
  _handles.clear();
}

References _filenames.

◆ openLibraries()

int g2o::DlWrapper::openLibraries	(	const std::string &	directory,
		const std::string &	pattern = `""`
	)

open all libs from a directory matching a specific pattern.

Returns: number of loaded libs

Definition at line 63 of file dl_wrapper.cpp.

                                                       {
  // cerr << "# loading libraries from " << directory << "\t pattern: " <<
  // pattern << endl;
  string searchPattern = directory + "/" + pattern;
  if (pattern == "") searchPattern = directory + "/*";
  vector<string> matchingFiles = getFilesByPattern(searchPattern.c_str());
 
  int numLibs = 0;
  for (size_t i = 0; i < matchingFiles.size(); ++i) {
    const string& filename = matchingFiles[i];
    if (find(_filenames.begin(), _filenames.end(), filename) !=
        _filenames.end())
      continue;
 
      // If we are doing a release build, the wildcards will pick up the
      // suffixes; unfortunately the "_rd" extension means that we
      // don't seem to be able to filter out the incompatible files using a
      // wildcard expansion to wordexp.
 
#ifndef G2O_LIBRARY_POSTFIX
    if ((filename.rfind(string("_d.") + SO_EXT) ==
         filename.length() - 3 - SO_EXT_LEN) ||
        (filename.rfind(string("_rd.") + SO_EXT) ==
         filename.length() - 4 - SO_EXT_LEN) ||
        (filename.rfind(string("_s.") + SO_EXT) ==
         filename.length() - 3 - SO_EXT_LEN))
      continue;
#endif
 
    // open the lib
    // cerr << "loading " << filename << endl;
    if (openLibrary(filename)) numLibs++;
  }
 
  return numLibs;
}

References _filenames, g2o::getFilesByPattern(), openLibrary(), SO_EXT, and SO_EXT_LEN.

Referenced by g2o::loadStandardSolver(), and g2o::loadStandardTypes().

◆ openLibrary()

bool g2o::DlWrapper::openLibrary ( const std::string & filename )

open a specific library

Definition at line 115 of file dl_wrapper.cpp.

                                                     {
#if defined(UNIX) || defined(CYGWIN)
  void* handle = dlopen(filename.c_str(), RTLD_LAZY);
  if (!handle) {
    cerr << __PRETTY_FUNCTION__ << " Cannot open library: " << dlerror()
         << '\n';
    return false;
  }
#elif defined(WINDOWS)
  HMODULE handle = LoadLibrary(filename.c_str());
  if (!handle) {
    cerr << __PRETTY_FUNCTION__ << " Cannot open library." << endl;
    return false;
  }
#endif
 
  // cerr << "loaded " << filename << endl;
 
  _filenames.push_back(filename);
  _handles.push_back(handle);
  return true;
}

References __PRETTY_FUNCTION__, and _filenames.

Referenced by g2o::loadStandardSolver(), g2o::loadStandardTypes(), and openLibraries().

◆ operator=()

DlWrapper & g2o::DlWrapper::operator= ( const DlWrapper & )

private

Member Data Documentation

◆ _filenames

std::vector<std::string> g2o::DlWrapper::_filenames

protected

Definition at line 74 of file dl_wrapper.h.

Referenced by clear(), openLibraries(), and openLibrary().

The documentation for this class was generated from the following files:

/build/reproducible-path/g2o-0~20230806/g2o/apps/g2o_cli/dl_wrapper.h
/build/reproducible-path/g2o-0~20230806/g2o/apps/g2o_cli/dl_wrapper.cpp

Public Member Functions

Protected Attributes

Private Member Functions