OW_DLLSharedLibrary.cpp

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#include "OW_config.h"

#if defined(OW_USE_DLL)
#include "OW_DLLSharedLibrary.hpp"
#include "OW_Format.hpp"
#include "OW_Mutex.hpp"
#include "OW_MutexLock.hpp"

#include <iostream>

namespace
{
typedef void (__stdcall *DllEntry_t)(void);
}

namespace OW_NAMESPACE
{

Mutex DLLSharedLibrary_guard;

DLLSharedLibrary::DLLSharedLibrary(HINSTANCE libhandle, const String& libName)
   : SharedLibrary(), m_libhandle(libhandle), m_libName(libName)
{
   DllEntry_t ensureInit;

   if( getFunctionPointer("DllEnsureInit", ensureInit) )
      ensureInit();
}
DLLSharedLibrary::~DLLSharedLibrary()
{
   DllEntry_t forceTerm;

   if( getFunctionPointer("DllForceTerm", forceTerm) )
      forceTerm();

   ::FreeLibrary(m_libhandle);
}
bool
DLLSharedLibrary::doGetFunctionPointer(const String& functionName,
   void** fp) const
{
   MutexLock l(DLLSharedLibrary_guard);

   *fp = (void*) ::GetProcAddress(m_libhandle, functionName.c_str());
     
   if (!*fp)
   {
      return false;
   }

   return true;
}

} // end namespace OW_NAMESPACE

#endif

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