Category

Development Platform
Home > SourceCode/Document > Windows Develop > View Code
beep.c
Package: win2ksrc.rar　[view]
Upload User: caisha3
Upload Date: 2013-09-21
Package Size: 208739k
Code Size: 5k
Category:

Windows Develop

Development Platform:

Visual C++

beep.c：Code Content
  1. /*++
  3. Copyright (c) 1990  Microsoft Corporation
  5. Module Name:
  7.     beep.c
  9. Abstract:
  11.     This module contains the Win32 Beep APIs
  13. Author:
  15.     Steve Wood (stevewo)  5-Oct-1991
  17. Revision History:
  19. --*/
  21. #include "basedll.h"
  22. #pragma hdrstop
  24. #include <ntddbeep.h>
  25. #include "conapi.h"
  28. /*
  29.  * Forward declaration
  30.  */
  32. VOID NotifySoundSentry(VOID);
  34. BOOL
  35. APIENTRY
  36. Beep(
  37.     DWORD dwFreq,
  38.     DWORD dwDuration
  39.     )
  40. {
  41.     OBJECT_ATTRIBUTES ObjectAttributes;
  42.     UNICODE_STRING NameString;
  43.     NTSTATUS Status;
  44.     IO_STATUS_BLOCK IoStatus;
  45.     BEEP_SET_PARAMETERS BeepParameters;
  46.     HANDLE hBeepDevice;
  48.     if ( IsTerminalServer() && NtCurrentPeb()->SessionId ) {
  49.         //
  50.         // Non-zero sessionid implies remote session.
  51.         //
  53.         if ( !pWinStationBeepOpen ) {
  54.             HMODULE hwinsta = NULL;
  55.             /*
  56.              *  Get handle to winsta.dll
  57.              */
  58.             if ( (hwinsta = LoadLibraryW( L"WINSTA" )) != NULL ) {
  60.                 pWinStationBeepOpen   = (PWINSTATIONBEEPOPEN)
  61.                     GetProcAddress( hwinsta, "_WinStationBeepOpen" );
  62.             }
  63.         }
  65.         hBeepDevice = NULL;
  67.         if ( pWinStationBeepOpen )
  68.             hBeepDevice = (*pWinStationBeepOpen)( -1 ); //Current Session
  70.         if ( hBeepDevice == NULL )
  71.             Status = STATUS_ACCESS_DENIED;
  72.         else
  73.             Status = STATUS_SUCCESS;
  74.     }
  75.     else {
  77.         RtlInitUnicodeString( &NameString, DD_BEEP_DEVICE_NAME_U );
  78.         InitializeObjectAttributes( &ObjectAttributes,
  79.                                     &NameString,
  80.                                     0,
  81.                                     NULL,
  82.                                     NULL
  83.                                   );
  84.         Status = NtCreateFile( &hBeepDevice,
  85.                                FILE_READ_DATA | FILE_WRITE_DATA,
  86.                                &ObjectAttributes,
  87.                                &IoStatus,
  88.                                NULL,
  89.                                0,
  90.                                FILE_SHARE_READ | FILE_SHARE_WRITE,
  91.                                FILE_OPEN_IF,
  92.                                0,
  93.                                (PVOID) NULL,
  94.                                0L
  95.                              );
  96.     }
  97.     if (!NT_SUCCESS( Status )) {
  98.         BaseSetLastNTError( Status );
  99.         return( FALSE );
  100.         }
  102.     //
  103.     // 0,0 is a special case used to turn off a beep.  Otherwise
  104.     // validate the dwFreq parameter to be in range.
  105.     //
  107.     if ((dwFreq != 0 || dwDuration != 0) &&
  108.         (dwFreq < (ULONG)0x25 || dwFreq > (ULONG)0x7FFF)
  109.        ) {
  110.         Status = STATUS_INVALID_PARAMETER;
  111.         }
  112.     else {
  113.         BeepParameters.Frequency = dwFreq;
  114.         BeepParameters.Duration = dwDuration;
  116.         Status = NtDeviceIoControlFile( hBeepDevice,
  117.                                         NULL,
  118.                                         NULL,
  119.                                         NULL,
  120.                                         &IoStatus,
  121.                                         IOCTL_BEEP_SET,
  122.                                         &BeepParameters,
  123.                                         sizeof( BeepParameters ),
  124.                                         NULL,
  125.                                         0
  126.                                       );
  127.         }
  129.     NotifySoundSentry();
  131.     if (!NT_SUCCESS( Status )) {
  132.         BaseSetLastNTError( Status );
  133.         NtClose( hBeepDevice );
  134.         return( FALSE );
  135.         }
  136.     else {
  137.         //
  138.         // Beep device is asynchronous, so sleep for duration
  139.         // to allow this beep to complete.
  140.         //
  142.         if (dwDuration != (DWORD)-1 && (dwFreq != 0 || dwDuration != 0)) {
  143.             SleepEx( dwDuration, TRUE );
  144.             }
  146.         NtClose( hBeepDevice );
  147.         return( TRUE );
  148.         }
  149. }
  152. VOID
  153. NotifySoundSentry(VOID)
  154. {
  156. #if defined(BUILD_WOW6432)
  157.     ULONG VideoMode;
  159.     if (!GetConsoleDisplayMode(&VideoMode)) {
  160.         VideoMode = 0;
  161.     }
  163.     //
  164.     // SoundSentry is currently only supported for Windows mode - no
  165.     // full screen support.
  166.     //
  167.      
  168.     if (VideoMode == 0) {    
  169.         CsrBasepSoundSentryNotification(VideoMode);
  170.     }
  171. #else
  172.     BASE_API_MSG m;
  173.     PBASE_SOUNDSENTRY_NOTIFICATION_MSG e =
  174.             (PBASE_SOUNDSENTRY_NOTIFICATION_MSG)&m.u.SoundSentryNotification;
  176.     if (!GetConsoleDisplayMode(&e->VideoMode)) {
  177.         e->VideoMode = 0;
  178.     }
  179.     //
  180.     // SoundSentry is currently only supported for Windows mode - no
  181.     // full screen support.
  182.     //
  183.     if (e->VideoMode == 0) {
  184.         CsrClientCallServer((PCSR_API_MSG)&m,
  185.                             NULL,
  186.                             CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX,
  187.                                                  BasepSoundSentryNotification ),
  188.                             sizeof( *e )
  189.                             );
  190.     }
  191. #endif
  193. }