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annotate fuhtark_test/include/ddk/csq.h @ 1501:f40d9d814c08 default tip main

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did: correct vulkan-api generator
author sam <sam@basx.dev>
date Wed, 26 Nov 2025 23:34:29 +0700
parents 91c8c3b7cbf0
children
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1 /*
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2 * Cancel-Safe Queue Library
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3 * Copyright (c) 2004, Vizzini (vizzini@plasmic.com)
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4 * Licensed under the GNU GPL for the ReactOS project
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5 *
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6 * This header defines the interface to the ReactOS Cancel-Safe Queue library.
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7 * This interface is based on and is similar to the Microsoft Cancel-Safe
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8 * Queue interface.
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9 *
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10 * BACKGROUND
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11 *
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12 * IRP queuing is a royal pain in the butt, due to the fact that there are
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13 * tons of built-in race conditions. IRP handling is difficult in general,
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14 * but the cancel logic has been particularly complicated due to some subtle
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15 * races, coupled with the fact that the system interfaces have changed over
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16 * time.
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17 *
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18 * Walter Oney (2nd. Ed. of Programming the Windows Driver Model) states a
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19 * common opinion among driver developers when he says that it is foolish
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20 * to try to roll your own cancel logic. There are only a very few people
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21 * who have gotten it right in the past. He suggests, instead, that you
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22 * either use his own well-tested code, or use the code in the Microsoft
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23 * Cancel-Safe Queue Library.
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24 *
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25 * We cannot do either, of course, due to copyright issues. I have therefore
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26 * created this clone of the Microsoft library in order to concentrate all
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27 * of the IRP-queuing bugs in one place. I'm quite sure there are problems
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28 * here, so if you are a driver writer, I'd be glad to hear your feedback.
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29 *
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30 * Apart from that, please try to use these routines, rather than building
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31 * your own. If you think you have found a bug, please bring it up with me
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32 * or on-list, as this is complicated and non-obvious stuff. Don't just
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33 * change this and hope for the best!
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34 *
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35 * USAGE
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36 *
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37 * This library follows exactly the same interface as the Microsoft Cancel-Safe
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38 * Queue routines (IoCsqXxx()). As such, the authoritative reference is the
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39 * current DDK. There is also a DDK sample called "cancel" that has an
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40 * example of how to use this code. I have also provided a sample driver
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41 * that makes use of this queue. Finally, please do read the header and the
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42 * source if you're curious about the inner workings of these routines.
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43 */
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44
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45 #ifndef _REACTOS_CSQ_H
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46 #define _REACTOS_CSQ_H
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47
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48 /*
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49 * Prevent including the CSQ definitions twice. They're present in NTDDK
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50 * now too, except the *_EX versions.
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51 */
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52 #ifndef IO_TYPE_CSQ_IRP_CONTEXT
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53
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54 struct _IO_CSQ;
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55
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56
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57 /*
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58 * CSQ Callbacks
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59 *
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60 * The cancel-safe queue is implemented as a set of IoCsqXxx() OS routines
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61 * copuled with a set of driver callbacks to handle the basic operations of
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62 * the queue. You need to supply one of each of these functions in your own
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63 * driver. These routines are also documented in the DDK under CsqXxx().
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64 * That is the authoritative documentation.
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65 */
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66
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67 /*
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68 * Function to insert an IRP in the queue. No need to worry about locking;
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69 * just tack it onto your list or something.
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70 *
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71 * Sample implementation:
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72 *
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73 VOID NTAPI CsqInsertIrp(PIO_CSQ Csq, PIRP Irp)
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74 {
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75 KdPrint(("Inserting IRP 0x%x into CSQ\n", Irp));
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76 InsertTailList(&IrpQueue, &Irp->Tail.Overlay.ListEntry);
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77 }
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78 *
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79 */
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80 typedef VOID (NTAPI *PIO_CSQ_INSERT_IRP) (struct _IO_CSQ *Csq,
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81 PIRP Irp);
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82
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83
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84 /*
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85 * Function to remove an IRP from the queue.
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86 *
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87 * Sample:
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88 *
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89 VOID NTAPI CsqRemoveIrp(PIO_CSQ Csq, PIRP Irp)
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90 {
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91 KdPrint(("Removing IRP 0x%x from CSQ\n", Irp));
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92 RemoveEntryList(&Irp->Tail.Overlay.ListEntry);
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93 }
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94 *
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95 */
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96 typedef VOID (NTAPI *PIO_CSQ_REMOVE_IRP) (struct _IO_CSQ *Csq,
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97 PIRP Irp);
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98
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99 /*
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100 * Function to look for an IRP in the queue
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101 *
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102 * Sample:
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103 *
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104 PIRP NTAPI CsqPeekNextIrp(PIO_CSQ Csq, PIRP Irp, PVOID PeekContext)
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105 {
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106 KdPrint(("Peeking for next IRP\n"));
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107
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108 if(Irp)
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109 return CONTAINING_RECORD(&Irp->Tail.Overlay.ListEntry.Flink, IRP, Tail.Overlay.ListEntry);
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110
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111 if(IsListEmpty(&IrpQueue))
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112 return NULL;
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113
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114 return CONTAINING_RECORD(IrpQueue.Flink, IRP, Tail.Overlay.ListEntry);
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115 }
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116 *
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117 */
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118 typedef PIRP (NTAPI *PIO_CSQ_PEEK_NEXT_IRP) (struct _IO_CSQ *Csq,
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119 PIRP Irp,
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120 PVOID PeekContext);
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121
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122 /*
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123 * Lock the queue. This can be a spinlock, a mutex, or whatever
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124 * else floats your boat.
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125 *
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126 * Sample:
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127 *
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128 VOID NTAPI CsqAcquireLock(PIO_CSQ Csq, PKIRQL Irql)
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129 {
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130 KdPrint(("Acquiring spin lock\n"));
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131 KeAcquireSpinLock(&IrpQueueLock, Irql);
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132 }
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133 *
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134 */
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135 typedef VOID (NTAPI *PIO_CSQ_ACQUIRE_LOCK) (struct _IO_CSQ *Csq,
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136 PKIRQL Irql);
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137
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138 /*
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139 * Unlock the queue:
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140 *
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141 VOID NTAPI CsqReleaseLock(PIO_CSQ Csq, KIRQL Irql)
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142 {
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143 KdPrint(("Releasing spin lock\n"));
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144 KeReleaseSpinLock(&IrpQueueLock, Irql);
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145 }
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146 *
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147 */
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148 typedef VOID (NTAPI *PIO_CSQ_RELEASE_LOCK) (struct _IO_CSQ *Csq,
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149 KIRQL Irql);
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150
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151 /*
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152 * Finally, this is called by the queue library when it wants to complete
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153 * a canceled IRP.
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154 *
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155 * Sample:
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156 *
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157 VOID NTAPI CsqCompleteCancelledIrp(PIO_CSQ Csq, PIRP Irp)
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158 {
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159 KdPrint(("cancelling irp 0x%x\n", Irp));
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160 Irp->IoStatus.Status = STATUS_CANCELLED;
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161 Irp->IoStatus.Information = 0;
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162 IoCompleteRequest(Irp, IO_NO_INCREMENT);
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163 }
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164 *
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165 */
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166 typedef VOID (NTAPI *PIO_CSQ_COMPLETE_CANCELED_IRP) (struct _IO_CSQ *Csq,
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167 PIRP Irp);
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168
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169
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170 /*
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171 * STRUCTURES
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172 *
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173 * NOTE: Please do not use these directly. You will make incompatible code
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174 * if you do. Always only use the documented IoCsqXxx() interfaces and you
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175 * will amass much Good Karma.
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176 */
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177 #define IO_TYPE_CSQ_IRP_CONTEXT 1
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178 #define IO_TYPE_CSQ 2
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179
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180 /*
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181 * IO_CSQ - Queue control structure
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182 */
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183 typedef struct _IO_CSQ {
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184 ULONG Type;
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185 PIO_CSQ_INSERT_IRP CsqInsertIrp;
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186 PIO_CSQ_REMOVE_IRP CsqRemoveIrp;
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187 PIO_CSQ_PEEK_NEXT_IRP CsqPeekNextIrp;
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188 PIO_CSQ_ACQUIRE_LOCK CsqAcquireLock;
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189 PIO_CSQ_RELEASE_LOCK CsqReleaseLock;
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190 PIO_CSQ_COMPLETE_CANCELED_IRP CsqCompleteCanceledIrp;
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191 PVOID ReservePointer; /* must be NULL */
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192 } IO_CSQ, *PIO_CSQ;
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193
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194 /*
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195 * IO_CSQ_IRP_CONTEXT - Context used to track an IRP in the CSQ
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196 */
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197 typedef struct _IO_CSQ_IRP_CONTEXT {
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198 ULONG Type;
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199 PIRP Irp;
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200 PIO_CSQ Csq;
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201 } IO_CSQ_IRP_CONTEXT, *PIO_CSQ_IRP_CONTEXT;
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202
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203 #endif /* IO_TYPE_CSQ_IRP_CONTEXT */
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204
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205 /* See IO_TYPE_CSQ_* above */
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206 #define IO_TYPE_CSQ_EX 3
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207
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208 /*
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209 * Function to insert an IRP into the queue with extended context information.
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210 * This is useful if you need to be able to de-queue particular IRPs more
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211 * easily in some cases.
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212 *
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213 * Same deal as above; sample implementation:
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214 *
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215 NTSTATUS NTAPI CsqInsertIrpEx(PIO_CSQ Csq, PIRP Irp, PVOID InsertContext)
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216 {
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217 CsqInsertIrp(Csq, Irp);
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218 return STATUS_PENDING;
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219 }
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220 *
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221 */
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222 typedef NTSTATUS (NTAPI *PIO_CSQ_INSERT_IRP_EX) (struct _IO_CSQ *Csq,
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223 PIRP Irp,
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224 PVOID InsertContext);
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225
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226 /*
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227 * CANCEL-SAFE QUEUE DDIs
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228 *
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229 * These device driver interfaces are called to make use of the queue. Again,
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230 * authoritative documentation for these functions is in the DDK. The csqtest
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231 * driver also makes use of some of them.
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232 */
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233
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234
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235 /*
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236 * Call this in DriverEntry or similar in order to set up the Csq structure.
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237 * As long as the Csq struct and the functions you pass in are resident,
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238 * there are no IRQL restrictions.
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239 */
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240 NTKERNELAPI
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241 NTSTATUS NTAPI IoCsqInitialize(PIO_CSQ Csq,
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242 PIO_CSQ_INSERT_IRP CsqInsertIrp,
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243 PIO_CSQ_REMOVE_IRP CsqRemoveIrp,
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244 PIO_CSQ_PEEK_NEXT_IRP CsqPeekNextIrp,
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245 PIO_CSQ_ACQUIRE_LOCK CsqAcquireLock,
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246 PIO_CSQ_RELEASE_LOCK CsqReleaseLock,
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247 PIO_CSQ_COMPLETE_CANCELED_IRP CsqCompleteCanceledIrp);
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248
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249 /*
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250 * Same as above, except you provide a CsqInsertIrpEx routine instead of
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251 * CsqInsertIrp. This eventually allows you to supply extra tracking
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252 * information for use with the queue.
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253 */
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254 NTKERNELAPI
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255 NTSTATUS NTAPI IoCsqInitializeEx(PIO_CSQ Csq,
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256 PIO_CSQ_INSERT_IRP_EX CsqInsertIrpEx,
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257 PIO_CSQ_REMOVE_IRP CsqRemoveIrp,
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258 PIO_CSQ_PEEK_NEXT_IRP CsqPeekNextIrp,
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259 PIO_CSQ_ACQUIRE_LOCK CsqAcquireLock,
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260 PIO_CSQ_RELEASE_LOCK CsqReleaseLock,
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261 PIO_CSQ_COMPLETE_CANCELED_IRP CsqCompleteCanceledIrp);
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262
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263 /*
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264 * Insert an IRP into the queue
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265 */
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266 NTKERNELAPI
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267 VOID NTAPI IoCsqInsertIrp(PIO_CSQ Csq,
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268 PIRP Irp,
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269 PIO_CSQ_IRP_CONTEXT Context);
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270
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271 /*
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272 * Insert an IRP into the queue, with special context maintained that
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273 * makes it easy to find IRPs in the queue
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274 */
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275 NTKERNELAPI
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276 NTSTATUS NTAPI IoCsqInsertIrpEx(PIO_CSQ Csq,
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277 PIRP Irp,
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278 PIO_CSQ_IRP_CONTEXT Context,
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279 PVOID InsertContext);
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280
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281 /*
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282 * Remove a particular IRP from the queue
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283 */
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284 NTKERNELAPI
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285 PIRP NTAPI IoCsqRemoveIrp(PIO_CSQ Csq,
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286 PIO_CSQ_IRP_CONTEXT Context);
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287
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288 /*
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289 * Remove the next IRP from the queue
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290 */
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291 NTKERNELAPI
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292 PIRP NTAPI IoCsqRemoveNextIrp(PIO_CSQ Csq,
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293 PVOID PeekContext);
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294
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295 #endif /* _REACTOS_CSQ_H */