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 Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 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  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #include "videoprt.h"
  23
  24 /*
  25  * @implemented
  26  */
  27
  28 VP_STATUS NTAPI
  29 VideoPortCreateSpinLock(
  30    IN PVOID HwDeviceExtension,
  31    OUT PSPIN_LOCK *SpinLock)
  32 {
  33    TRACE_(VIDEOPRT, "VideoPortCreateSpinLock\n");
  34    *SpinLock = ExAllocatePool(NonPagedPool, sizeof(KSPIN_LOCK));
  35    if (*SpinLock == NULL)
  36       return ERROR_NOT_ENOUGH_MEMORY;
  37    KeInitializeSpinLock((PKSPIN_LOCK)*SpinLock);
  38    return NO_ERROR;
  39 }
  40
  41 /*
  42  * @implemented
  43  */
  44
  45 VP_STATUS NTAPI
  46 VideoPortDeleteSpinLock(
  47    IN PVOID HwDeviceExtension,
  48    IN PSPIN_LOCK SpinLock)
  49 {
  50    TRACE_(VIDEOPRT, "VideoPortDeleteSpinLock\n");
  51    ExFreePool(SpinLock);
  52    return NO_ERROR;
  53 }
  54
  55 /*
  56  * @implemented
  57  */
  58
  59 VOID NTAPI
  60 VideoPortAcquireSpinLock(
  61    IN PVOID HwDeviceExtension,
  62    IN PSPIN_LOCK SpinLock,
  63    OUT PUCHAR OldIrql)
  64 {
  65    TRACE_(VIDEOPRT, "VideoPortAcquireSpinLock\n");
  66    KeAcquireSpinLock((PKSPIN_LOCK)SpinLock, OldIrql);
  67 }
  68
  69 /*
  70  * @implemented
  71  */
  72
  73 VOID NTAPI
  74 VideoPortAcquireSpinLockAtDpcLevel(
  75    IN PVOID HwDeviceExtension,
  76    IN PSPIN_LOCK SpinLock)
  77 {
  78    TRACE_(VIDEOPRT, "VideoPortAcquireSpinLockAtDpcLevel\n");
  79    KeAcquireSpinLockAtDpcLevel((PKSPIN_LOCK)SpinLock);
  80 }
  81
  82 /*
  83  * @implemented
  84  */
  85
  86 VOID NTAPI
  87 VideoPortReleaseSpinLock(
  88    IN PVOID HwDeviceExtension,
  89    IN PSPIN_LOCK SpinLock,
  90    IN UCHAR NewIrql)
  91 {
  92    TRACE_(VIDEOPRT, "VideoPortReleaseSpinLock\n");
  93    KeReleaseSpinLock((PKSPIN_LOCK)SpinLock, NewIrql);
  94 }
  95
  96 /*
  97  * @implemented
  98  */
  99
 100 VOID NTAPI
 101 VideoPortReleaseSpinLockFromDpcLevel(
 102    IN PVOID HwDeviceExtension,
 103    IN PSPIN_LOCK SpinLock)
 104 {
 105    TRACE_(VIDEOPRT, "VideoPortReleaseSpinLockFromDpcLevel\n");
 106    KeReleaseSpinLockFromDpcLevel((PKSPIN_LOCK)SpinLock);
 107 }