g2o::DlWrapper Class Reference

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 44 of file dl_wrapper.h.

Constructor & Destructor Documentation

g2o::DlWrapper::DlWrapper

(

)

Definition at line 56 of file dl_wrapper.cpp.

{
}

g2o::DlWrapper::~DlWrapper ( )

virtual

Definition at line 60 of file dl_wrapper.cpp.

{
  //clear();
}

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

private

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

Member Function Documentation

void g2o::DlWrapper::clear

(

)

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

Definition at line 100 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();
}

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 65 of file dl_wrapper.cpp.

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

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

{
  //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;
}

bool g2o::DlWrapper::openLibrary

(

const std::string &

filename

)

open a specific library

Definition at line 115 of file dl_wrapper.cpp.

References __PRETTY_FUNCTION__.

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

{
# 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;
}

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

private

Member Data Documentation

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

protected

Definition at line 72 of file dl_wrapper.h.

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

• /home/xuezhisd/CLionProjects/g2o/g2o/apps/g2o_cli/dl_wrapper.h
• /home/xuezhisd/CLionProjects/g2o/g2o/apps/g2o_cli/dl_wrapper.cpp