win32ss/drivers/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 #define NDEBUG
  25 #include <debug.h>
  26
  27 /*
  28  * @implemented
  29  */
  30
  31 VP_STATUS NTAPI
  32 VideoPortCreateSpinLock(
  33    IN PVOID HwDeviceExtension,
  34    OUT PSPIN_LOCK *SpinLock)
  35 {
  36    TRACE_(VIDEOPRT, "VideoPortCreateSpinLock\n");
  37    *SpinLock = ExAllocatePool(NonPagedPool, sizeof(KSPIN_LOCK));
  38    if (*SpinLock == NULL)
  39       return ERROR_NOT_ENOUGH_MEMORY;
  40    KeInitializeSpinLock((PKSPIN_LOCK)*SpinLock);
  41    return NO_ERROR;
  42 }
  43
  44 /*
  45  * @implemented
  46  */
  47
  48 VP_STATUS NTAPI
  49 VideoPortDeleteSpinLock(
  50    IN PVOID HwDeviceExtension,
  51    IN PSPIN_LOCK SpinLock)
  52 {
  53    TRACE_(VIDEOPRT, "VideoPortDeleteSpinLock\n");
  54    ExFreePool(SpinLock);
  55    return NO_ERROR;
  56 }
  57
  58 /*
  59  * @implemented
  60  */
  61
  62 VOID NTAPI
  63 VideoPortAcquireSpinLock(
  64    IN PVOID HwDeviceExtension,
  65    IN PSPIN_LOCK SpinLock,
  66    OUT PUCHAR OldIrql)
  67 {
  68    TRACE_(VIDEOPRT, "VideoPortAcquireSpinLock\n");
  69    KeAcquireSpinLock((PKSPIN_LOCK)SpinLock, OldIrql);
  70 }
  71
  72 /*
  73  * @implemented
  74  */
  75
  76 VOID NTAPI
  77 VideoPortAcquireSpinLockAtDpcLevel(
  78    IN PVOID HwDeviceExtension,
  79    IN PSPIN_LOCK SpinLock)
  80 {
  81    TRACE_(VIDEOPRT, "VideoPortAcquireSpinLockAtDpcLevel\n");
  82    KeAcquireSpinLockAtDpcLevel((PKSPIN_LOCK)SpinLock);
  83 }
  84
  85 /*
  86  * @implemented
  87  */
  88
  89 VOID NTAPI
  90 VideoPortReleaseSpinLock(
  91    IN PVOID HwDeviceExtension,
  92    IN PSPIN_LOCK SpinLock,
  93    IN UCHAR NewIrql)
  94 {
  95    TRACE_(VIDEOPRT, "VideoPortReleaseSpinLock\n");
  96    KeReleaseSpinLock((PKSPIN_LOCK)SpinLock, NewIrql);
  97 }
  98
  99 /*
 100  * @implemented
 101  */
 102
 103 VOID NTAPI
 104 VideoPortReleaseSpinLockFromDpcLevel(
 105    IN PVOID HwDeviceExtension,
 106    IN PSPIN_LOCK SpinLock)
 107 {
 108    TRACE_(VIDEOPRT, "VideoPortReleaseSpinLockFromDpcLevel\n");
 109    KeReleaseSpinLockFromDpcLevel((PKSPIN_LOCK)SpinLock);
 110 }