reactos/drivers/video/videoprt/spinlock.c

   1 /*
   2  * VideoPort driver
   3  *
   4  * Copyright (C) 2002, 2003, 2004 ReactOS Team
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; see the file COPYING.LIB.
  18  * If not, write to the Free Software Foundation,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  *
  21  * $Id$
  22  */
  23
  24 #include "videoprt.h"
  25
  26 /*
  27  * @implemented
  28  */
  29
  30 VP_STATUS NTAPI
  31 VideoPortCreateSpinLock(
  32    IN PVOID HwDeviceExtension,
  33    OUT PSPIN_LOCK *SpinLock)
  34 {
  35    DPRINT("VideoPortCreateSpinLock\n");
  36    *SpinLock = ExAllocatePool(NonPagedPool, sizeof(KSPIN_LOCK));
  37    if (*SpinLock == NULL)
  38       return ERROR_NOT_ENOUGH_MEMORY;
  39    KeInitializeSpinLock((PKSPIN_LOCK)*SpinLock);
  40    return NO_ERROR;
  41 }
  42
  43 /*
  44  * @implemented
  45  */
  46
  47 VP_STATUS NTAPI
  48 VideoPortDeleteSpinLock(
  49    IN PVOID HwDeviceExtension,
  50    IN PSPIN_LOCK SpinLock)
  51 {
  52    DPRINT("VideoPortDeleteSpinLock\n");
  53    ExFreePool(SpinLock);
  54    return NO_ERROR;
  55 }
  56
  57 /*
  58  * @implemented
  59  */
  60
  61 VOID NTAPI
  62 VideoPortAcquireSpinLock(
  63    IN PVOID HwDeviceExtension,
  64    IN PSPIN_LOCK SpinLock,
  65    OUT PUCHAR OldIrql)
  66 {
  67    DPRINT("VideoPortAcquireSpinLock\n");
  68    KeAcquireSpinLock((PKSPIN_LOCK)SpinLock, OldIrql);
  69 }
  70
  71 /*
  72  * @implemented
  73  */
  74
  75 VOID NTAPI
  76 VideoPortAcquireSpinLockAtDpcLevel(
  77    IN PVOID HwDeviceExtension,
  78    IN PSPIN_LOCK SpinLock)
  79 {
  80    DPRINT("VideoPortAcquireSpinLockAtDpcLevel\n");
  81    KefAcquireSpinLockAtDpcLevel((PKSPIN_LOCK)SpinLock);
  82 }
  83
  84 /*
  85  * @implemented
  86  */
  87
  88 VOID NTAPI
  89 VideoPortReleaseSpinLock(
  90    IN PVOID HwDeviceExtension,
  91    IN PSPIN_LOCK SpinLock,
  92    IN UCHAR NewIrql)
  93 {
  94    DPRINT("VideoPortReleaseSpinLock\n");
  95    KeReleaseSpinLock((PKSPIN_LOCK)SpinLock, NewIrql);
  96 }
  97
  98 /*
  99  * @implemented
 100  */
 101
 102 VOID NTAPI
 103 VideoPortReleaseSpinLockFromDpcLevel(
 104    IN PVOID HwDeviceExtension,
 105    IN PSPIN_LOCK SpinLock)
 106 {
 107    DPRINT("VideoPortReleaseSpinLockFromDpcLevel\n");
 108    KefReleaseSpinLockFromDpcLevel((PKSPIN_LOCK)SpinLock);
 109 }