118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
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/*
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* CASHDRWR.C
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*
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* Point-of-Sale Control Panel Applet
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*
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* Author: Ervin Peretz
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*
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* (c) 2001 Microsoft Corporation
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*/
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#include <windows.h>
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#include <windowsx.h>
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#include <commctrl.h>
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#include <cpl.h>
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#include <setupapi.h>
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#include <hidsdi.h>
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#include "internal.h"
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#include "res.h"
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#include "debug.h"
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#if USE_OVERLAPPED_IO
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VOID CALLBACK OverlappedWriteCompletionRoutine( DWORD dwErrorCode,
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DWORD dwNumberOfBytesTransfered,
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LPOVERLAPPED lpOverlapped)
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{
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posDevice *posDev;
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/*
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* We stashed our context in the hEvent field of the
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* overlapped structure (this is allowed).
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*/
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ASSERT(lpOverlapped);
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posDev = lpOverlapped->hEvent;
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ASSERT(posDev->sig == POSCPL_SIG);
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posDev->overlappedWriteStatus = dwErrorCode;
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posDev->overlappedWriteLen = dwNumberOfBytesTransfered;
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SetEvent(posDev->overlappedWriteEvent);
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}
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#endif
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BOOL SetCashDrawerState(posDevice *posDev, enum cashDrawerStates newState)
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{
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NTSTATUS ntStat;
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BOOL result = FALSE;
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ASSERT(posDev->hidCapabilities.OutputReportByteLength <= 20);
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ntStat = HidP_SetUsageValue(HidP_Output,
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USAGE_PAGE_CASH_DEVICE,
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0, // all collections
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USAGE_CASH_DRAWER_SET,
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newState,
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posDev->hidPreparsedData,
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posDev->writeBuffer,
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posDev->hidCapabilities.OutputReportByteLength);
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if (ntStat == HIDP_STATUS_SUCCESS){
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DWORD bytesWritten = 0;
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BOOL ok;
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ASSERT(posDev->hidCapabilities.OutputReportByteLength > 0);
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ASSERT(posDev->writeBuffer);
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#if USE_OVERLAPPED_IO
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/*
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* It's ok to stash our context in the hEvent field
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* of the overlapped structure.
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*/
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posDev->overlappedWriteInfo.hEvent = (HANDLE)posDev;
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posDev->overlappedWriteInfo.Offset = 0;
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posDev->overlappedWriteInfo.OffsetHigh = 0;
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posDev->overlappedWriteLen = 0;
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ResetEvent(posDev->overlappedWriteEvent);
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ok = WriteFileEx( posDev->devHandle,
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posDev->writeBuffer,
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posDev->hidCapabilities.OutputReportByteLength,
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&posDev->overlappedWriteInfo,
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OverlappedWriteCompletionRoutine);
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if (ok){
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WaitForSingleObject(posDev->overlappedWriteEvent, INFINITE);
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ok = (posDev->overlappedWriteStatus == NO_ERROR);
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bytesWritten = posDev->overlappedWriteLen;
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}
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else {
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bytesWritten = 0;
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}
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#else
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ok = WriteFile( posDev->devHandle,
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posDev->writeBuffer,
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posDev->hidCapabilities.OutputReportByteLength,
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&bytesWritten,
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NULL);
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#endif
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if (ok){
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ASSERT(bytesWritten <= posDev->hidCapabilities.OutputReportByteLength);
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result = TRUE;
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}
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else {
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DWORD err = GetLastError();
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DBGERR(L"WriteFile failed", err);
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}
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}
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else {
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DBGERR(L"HidP_SetUsageValue failed", ntStat);
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DBGERR(DBGHIDSTATUSSTR(ntStat), 0);
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}
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return result;
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}
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