Driver Factory Function

Every driver dynamic library needs to implement the standard driver factory function and use it to return implementations of the OpenVR driver interfaces. This function is the entry-point for every driver.

A typical factory function looks like this:

#define HMD_DLL_EXPORT extern "C" __declspec( dllexport )

HMD_DLL_EXPORT 
void *HmdDriverFactory( const char *pInterfaceName, int *pReturnCode )
{
	if( 0 == strcmp( IServerTrackedDeviceProvider_Version, pInterfaceName ) )
	{
		return <global for server driver provider>;
	}
	if( 0 == strcmp( IVRWatchdogProvider_Version, pInterfaceName ) )
	{
		return <global for watchdog driver>;
	}


	if( pReturnCode )
		*pReturnCode = HmdError_Init_InterfaceNotFound;

	return NULL;
}

If you wish to implement IVRWatchdogProvider, please see the example code in the sample driver.