granicus.if.org Git - icinga2/blob - lib/base/library.cpp

   1 /* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
   2
   3 #include "base/library.hpp"
   4 #include "base/loader.hpp"
   5 #include "base/logger.hpp"
   6 #include "base/exception.hpp"
   7 #include "base/application.hpp"
   8
   9 using namespace icinga;
  10
  11 /**
  12  * Loads the specified library.
  13  *
  14  * @param name The name of the library.
  15  */
  16 Library::Library(const String& name)
  17 {
  18         String path;
  19 #if defined(_WIN32)
  20         path = name + ".dll";
  21 #elif defined(__APPLE__)
  22         path = "lib" + name + "." + Application::GetAppSpecVersion() + ".dylib";
  23 #else /* __APPLE__ */
  24         path = "lib" + name + ".so." + Application::GetAppSpecVersion();
  25 #endif /* _WIN32 */
  26
  27         Log(LogNotice, "Library")
  28                 << "Loading library '" << path << "'";
  29
  30 #ifdef _WIN32
  31         HMODULE hModule = LoadLibrary(path.CStr());
  32
  33         if (!hModule) {
  34                 BOOST_THROW_EXCEPTION(win32_error()
  35                         << boost::errinfo_api_function("LoadLibrary")
  36                         << errinfo_win32_error(GetLastError())
  37                         << boost::errinfo_file_name(path));
  38         }
  39 #else /* _WIN32 */
  40         void *hModule = dlopen(path.CStr(), RTLD_NOW | RTLD_GLOBAL);
  41
  42         if (!hModule) {
  43                 BOOST_THROW_EXCEPTION(std::runtime_error("Could not load library '" + path + "': " + dlerror()));
  44         }
  45 #endif /* _WIN32 */
  46
  47         Loader::ExecuteDeferredInitializers();
  48
  49         m_Handle.reset(new LibraryHandle(hModule), [](LibraryHandle *handle) {
  50 #ifdef _WIN32
  51                 FreeLibrary(*handle);
  52 #else /* _WIN32 */
  53                 dlclose(*handle);
  54 #endif /* _WIN32 */
  55         });
  56 }
  57
  58 void *Library::GetSymbolAddress(const String& name) const
  59 {
  60         if (!m_Handle)
  61                 BOOST_THROW_EXCEPTION(std::runtime_error("Invalid library handle"));
  62
  63 #ifdef _WIN32
  64         return GetProcAddress(*m_Handle.get(), name.CStr());
  65 #else /* _WIN32 */
  66         return dlsym(*m_Handle.get(), name.CStr());
  67 #endif /* _WIN32 */
  68 }