src/dynamic.cpp

   1 #include "globals.h"
   2 #include <dlfcn.h>
   3 #include "dynamic.h"
   4
   5
   6
   7 DLLManager::DLLManager( const char *fname )
   8 {
   9     // Try to open the library now and get any error message.
  10
  11         h=dlopen( fname, RTLD_NOW );
  12         err=dlerror();
  13 }
  14
  15 DLLManager::~DLLManager()
  16 {
  17         // close the library if it isn't null
  18         if( h!=0 )
  19         dlclose(h);
  20 }
  21
  22
  23 bool DLLManager::GetSymbol(
  24                            void **v,
  25                            const char *sym_name
  26                            )
  27 {
  28         // try extract a symbol from the library
  29         // get any error message is there is any
  30
  31         if( h!=0 )
  32         {
  33                 *v = dlsym( h, sym_name );
  34         err=dlerror();
  35             if( err==0 )
  36           return true;
  37         else
  38           return false;
  39         }
  40         else
  41         {
  42         return false;
  43         }
  44
  45 }
  46
  47
  48 DLLFactoryBase::DLLFactoryBase(
  49                                const char *fname,
  50                                const char *factory=0
  51                                ) : DLLManager(fname)
  52 {
  53         // try get the factory function if there is no error yet
  54
  55         factory_func=0;
  56
  57         if( LastError()==0 )
  58         {
  59         GetSymbol( (void **)&factory_func, factory ? factory : "init_module" );
  60         }
  61
  62 }
  63
  64
  65 DLLFactoryBase::~DLLFactoryBase()
  66 {
  67 }
  68
  69
  70