Rockwell Automation 2711P Software Development Kit User Manual - Manual (Page 88)

Publication 2711P-UM005A-EN-P - March 2007
88 Device Drivers
PDDKISRINFO pdii,
PDDKPCIINFO pdpi
);
#endif // defined(DRV_USE_PCI)
DRV_Deinit(
DWORD hDeviceContext
);
static DWORD WINAPI
IstThreadProc(
LPVOID lpParameter
);
/////////////////////////////////////////////////////////////////////
//
// DRV_Init()
//
// Refer to Microsoft documentation on Device Driver Development for a
// detailed description of this function and its parameters.
//
// NOTE: This function will attempt to initialize a NOP driver that
// will be referred to as "DRV:". If a non-recoverable error occurs
// during the INIT phase this function will call DRV_Deinit(). This
// function is safe to call multiple times. This is done to insure
// proper driver cleanup.
//
/////////////////////////////////////////////////////////////////////
DWORD
DRV_Init(
DWORD dwContext
)
{
#if defined(DRV_USE_PCI)
DWORD dwErr;
#endif // defined(DRV_USE_PCI)
PDRV_DATA pDrvData = NULL;
DEBUGMSG(ZONE_FUNC, (TEXT("DRV_Init+\r\n")));
//
// first, create a memory block to store this drivers' global instance data
//
if (NULL == (pDrvData = (PDRV_DATA)LocalAlloc(LMEM_FIXED | LMEM_ZEROINIT,
sizeof(DRV_DATA))))
{
ERRORMSG(1,(_T("DRV_Init: LocalAlloc failed!\r\n")));
DEBUGMSG(ZONE_FUNC, (TEXT("DRV_Init-\r\n")));
return (0);
}
//
// fill in global info
//
pDrvData->bExitThread = FALSE;
pDrvData->hEvent = INVALID_HANDLE_VALUE;
pDrvData->hThread = INVALID_HANDLE_VALUE;
pDrvData->Gii.SysIntr = 0;