core/dbus_wrap.cpp

   1
   2 #include "config.h"
   3
   4 #include "dbus_wrap.h"
   5
   6 #ifdef HAVE_DYNLOAD
   7
   8 #include <mutex>
   9 #include <type_traits>
  10
  11 #include "logging.h"
  12
  13
  14 void *dbus_handle{nullptr};
  15 #define DECL_FUNC(x) decltype(p##x) p##x{};
  16 DBUS_FUNCTIONS(DECL_FUNC)
  17 #undef DECL_FUNC
  18
  19 void PrepareDBus()
  20 {
  21     static constexpr char libname[] = "libdbus-1.so.3";
  22
  23     auto load_func = [](auto &f, const char *name) -> void
  24     { f = reinterpret_cast<std::remove_reference_t<decltype(f)>>(GetSymbol(dbus_handle, name)); };
  25 #define LOAD_FUNC(x) do {                         \
  26     load_func(p##x, #x);                          \
  27     if(!p##x)                                     \
  28     {                                             \
  29         WARN("Failed to load function %s\n", #x); \
  30         CloseLib(dbus_handle);                    \
  31         dbus_handle = nullptr;                    \
  32         return;                                   \
  33     }                                             \
  34 } while(0);
  35
  36     dbus_handle = LoadLib(libname);
  37     if(!dbus_handle)
  38     {
  39         WARN("Failed to load %s\n", libname);
  40         return;
  41     }
  42
  43 DBUS_FUNCTIONS(LOAD_FUNC)
  44 #undef LOAD_FUNC
  45 }
  46 #endif