[gmpi] Re: calling C from C++
- From: Jeff McClintock <jeffmcc@xxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Mon, 14 Feb 2005 18:26:09 +1300
Cheers All,
--------------gmpi.c--------------------------------------
#include <stdio.h>
#include "gmpi.h"
//int _tmain(int argc, _TCHAR* argv[])
int main(int argc, char* argv[])
{
/* signature of Factory construction function */
GMPI_DllEntry dll_entry_point;
GMPI_DllHandle dll_handle;
IGMPI_Factory *factory;
IGMPI_Plugin *my_plugin;
GMPI_RESULT r;
/* format of plugin unique ID undecided. for now using GUID */
/* {5CC85CAD-DC0C-42c2-80FD-DC3ADBC70641} */
static const GUID IID_GMPI_Prototype_DSP =
{ 0x5cc85cad, 0xdc0c, 0x42c2, { 0x80, 0xfd, 0xdc, 0x3a, 0xdb, 0xc7,
0x6, 0x41 } };
/* STEP 1: Load DLL */
r = GMPI_DllLoad( &dll_handle, "../test_plugin/debug/test_plugin.dll" );
/* STEP 2: Locate entrypoint */
r = GMPI_DllSymbol( &dll_handle, "DllGetClassObject", &dll_entry_point
);
/* STEP 3: Create factory */
r = (dll_entry_point)( &IID_GMPI_Factory, &IID_GMPI_Factory, (void**)
&factory );
/* STEP 4: Ask factory to instantiate plugin */
r = (factory->Vtable->CreateInstance)(factory, &IID_GMPI_Prototype_DSP,
(void**) &my_plugin);
// test a call into plugin
r = (my_plugin->Vtable->Placeholder1)(my_plugin, 42);
/* STEP 5: delete factory and plugin */
r = (my_plugin->Vtable->Release)(my_plugin);
r = (factory->Vtable->Release)(factory);
return 0;
}
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