Marc Wäckerlin
20 years ago
parent
4d0af6ae04
commit
190b0c58ce
3 changed files with 237 additions and 0 deletions
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/** @file
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$Id$ |
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$Date$ |
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$Author$ |
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@copy © Marc Wäckerlin |
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@license LGPL, see file <a href="license.html">COPYING</a> |
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$Log$ |
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Revision 1.1 2005/02/18 15:53:56 marc |
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initial release |
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1 2 3 4 5 6 7 8 |
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5678901234567890123456789012345678901234567890123456789012345678901234567890 |
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*/ |
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#ifndef __MRW_DYNAMICLIBRARY_HPP__ |
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#define __MRW_DYNAMICLIBRARY_HPP__ |
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#include <ltdl.h> |
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#include <mrw/string.hpp> |
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#include <mrw/stdext.hpp> |
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#include <mrw/exception.hpp> |
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namespace mrw { |
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class DynamicLibrary { |
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public: |
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class failure: public mrw::runtime_error { |
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public: |
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failure(const std::string& arg) throw(std::bad_exception): |
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mrw::runtime_error("DynamicLibrary failure "+arg |
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+"; ltdl reason: "+ |
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+mrw::ifelse(lt_dlerror(), "<none>")) { |
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} |
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}; |
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class Lib { |
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Lib() throw(): _lib(0) {} |
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Lib(const std::string& lib) throw(std::exception): _lib(0) { |
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open(lib); |
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} |
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~Lib() throw() { |
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try {close();} catch(...) {} |
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} |
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operator bool() throw() { |
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return _lib; |
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} |
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Lib& open(const std::string& lib) throw(std::exception) { |
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close(); |
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if (!(_lib = lt_dlopenext(lib.c_str()))) |
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throw failure("cannot open dynamic library "+lib); |
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return *this; |
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} |
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Lib& close() throw(std::exception) { |
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if (_lib && lt_dlclose(_lib)!=0) |
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throw failure("cannot close dynamic library"); |
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_lib = 0; |
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return *this; |
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} |
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private: |
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friend class DynamicLibrary; |
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lt_dlhandle handle() throw(std::exception) { |
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if (!_lib) |
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throw failure("library not open"); |
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return _lib; |
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} |
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private: |
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lt_dlhandle _lib; |
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}; |
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public: |
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DynamicLibrary() throw(std::exception): _opened(false) { |
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if (lt_dlinit()>0) |
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throw failure("cannot initialize dynamic library loader"); |
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_opened = true; |
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} |
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DynamicLibrary(const std::string& lib) throw(std::exception): |
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_opened(false) { |
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if (lt_dlinit()>0) |
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throw failure("cannot initialize dynamic library loader"); |
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_opened = true; |
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_lib.open(lib); |
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} |
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~DynamicLibrary() throw() { |
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try {close();} catch (...) {} |
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if (_opened) lt_dlexit(); |
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} |
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DynamicLibrary& open(const std::string& lib) throw(std::exception) { |
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_lib.open(lib); |
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return *this; |
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} |
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DynamicLibrary& close() throw(std::exception) { |
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_lib.close(); |
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return *this; |
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} |
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DynamicLibrary& resident() throw(std::exception) { |
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if (lt_dlmakeresident(_lib.handle())!=0) |
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throw failure("cannot make library resident"); |
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return *this; |
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} |
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bool isResident() throw(std::exception) { |
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return lt_dlisresident(_lib.handle())==1; |
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} |
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lt_ptr symbol(const std::string& name) throw(std::exception) { |
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lt_ptr sym(lt_dlsym(_lib.handle(), name.c_str())); |
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if (!sym) |
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throw failure("cannot load dynamic library symbol: "+name); |
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return sym; |
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} |
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/**
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{{"name1", &name1}, {"name2", &name2}, 0} |
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*/ |
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DynamicLibrary& preload(const lt_dlsymlist* symbols) |
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throw(std::exception) { |
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if (lt_dlpreload(symbols)!=0) |
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throw failure("error in preloading libraries"); |
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return *this; |
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} |
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/**
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{{"name1", &name1}, {"name2", &name2}, 0} |
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*/ |
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DynamicLibrary& preloadDefault(const lt_dlsymlist* symbols) |
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throw(std::exception) { |
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if (lt_dlpreload_default(symbols)!=0) |
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throw failure("error in preloading libraries"); |
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return *this; |
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} |
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int foreachfile(const char* searchPath, |
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int(*function)(const char*, lt_ptr), |
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lt_ptr data) throw() { |
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return lt_dlforeachfile(searchPath, function, data); |
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} |
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/// @todo enable
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// static void preloadedSymbols(const std::string& lib,
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// const lt_dlsymlist symbols[])
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// throw(std::exception) {
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// Lib lib(lt_dlopenext(lib.c_str()));
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// LTDL_SET_PRELOADED_SYMBOLS(symbols);
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// }
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static void addSearchDir(const std::string& dir) throw(std::exception) { |
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if (lt_dladdsearchdir(dir.c_str())!=0) |
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throw failure("cannot add search dir: "+dir); |
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} |
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static void insertSearchDir(const std::string& before, |
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const std::string& dir) |
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throw(std::exception) { |
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if (lt_dlinsertsearchdir(before.c_str(), dir.c_str())!=0) |
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throw failure("cannot add search dir: "+dir); |
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} |
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/// @todo enable
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// static std::string void setSearchPath(const std::string& dir) throw() {
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// char const * const path(lt_dlgetsearchpath());
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// if (!path)
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// throw failure("cannot get search path");
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// return path;
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// }
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private: |
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bool _opened; |
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Lib _lib; |
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}; |
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} |
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#endif |
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@ -0,0 +1,47 @@ |
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/** @file
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$Id$ |
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$Date$ |
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$Author$ |
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@copy © Marc Wäckerlin |
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@license LGPL, see file <a href="license.html">COPYING</a> |
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$Log$ |
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Revision 1.1 2005/02/18 15:53:56 marc |
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initial release |
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1 2 3 4 5 6 7 8 |
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5678901234567890123456789012345678901234567890123456789012345678901234567890 |
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*/ |
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#include <mrw/dynamiclibrary.hpp> |
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#include <cppunit/TestFixture.h> |
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#include <cppunit/ui/text/TestRunner.h> |
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#include <cppunit/extensions/HelperMacros.h> |
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#include <cppunit/extensions/TestFactoryRegistry.h> |
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class DynamicLibraryTest: public CppUnit::TestFixture {
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public: |
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void Load() { |
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mrw::DynamicLibrary lib("libdynamiclibrary_testlib"); |
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int(*test1)(int) = (int(*)(int))lib.symbol("test1"); |
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CPPUNIT_ASSERT((*test1)(2)==4); |
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} |
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void LoadError() { |
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mrw::DynamicLibrary lib("DASist-Sicher_Keine_DynamischePHIPLIOTEEK!!!"); |
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} |
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CPPUNIT_TEST_SUITE(DynamicLibraryTest); |
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CPPUNIT_TEST(Load); |
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CPPUNIT_TEST_EXCEPTION(LoadError, mrw::DynamicLibrary::failure); |
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CPPUNIT_TEST_SUITE_END(); |
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}; |
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CPPUNIT_TEST_SUITE_REGISTRATION(DynamicLibraryTest); |
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int main() { |
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CppUnit::TextUi::TestRunner runner; |
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runner.addTest(CppUnit::TestFactoryRegistry::getRegistry().makeTest()); |
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return runner.run() ? 0 : 1; |
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} |
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@ -0,0 +1,24 @@ |
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/** @file
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$Id$ |
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$Date$ |
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$Author$ |
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@copy © Marc Wäckerlin |
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@license LGPL, see file <a href="license.html">COPYING</a> |
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$Log$ |
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Revision 1.1 2005/02/18 15:53:55 marc |
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initial release |
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1 2 3 4 5 6 7 8 |
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5678901234567890123456789012345678901234567890123456789012345678901234567890 |
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*/ |
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extern "C" { |
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int test1(int i) { |
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return i*i; |
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} |
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} |
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