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/*++
Copyright (c) Microsoft Corporation, All Rights Reserved
Module Name:
queue.h
Abstract:
This file defines the queue callback interface.
Environment:
Windows Driver Framework
--*/
#pragma once
#include "internal.h"
// Set ring buffer size
#define DATA_BUFFER_SIZE 1024
//
// Device states
//
#define COMMAND_MATCH_STATE_IDLE 0
#define COMMAND_MATCH_STATE_GOT_A 1
#define COMMAND_MATCH_STATE_GOT_T 2
//
// Define useful macros
//
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#endif
#define MAXULONG 0xffffffff
typedef struct _QUEUE_CONTEXT
{
UCHAR CommandMatchState;
BOOLEAN ConnectCommand;
BOOLEAN IgnoreNextChar;
BOOLEAN ConnectionStateChanged;
BOOLEAN CurrentlyConnected;
RING_BUFFER RingBuffer; // Ring buffer for pending data
BYTE Buffer[DATA_BUFFER_SIZE];
WDFQUEUE Queue; // Default parallel queue
WDFQUEUE ReadQueue; // Manual queue for pending reads
WDFQUEUE WaitMaskQueue; // Manual queue for pending ioctl wait-on-mask
PDEVICE_CONTEXT DeviceContext;
} QUEUE_CONTEXT, *PQUEUE_CONTEXT;
WDF_DECLARE_CONTEXT_TYPE_WITH_NAME(QUEUE_CONTEXT, GetQueueContext);
EVT_WDF_IO_QUEUE_IO_READ EvtIoRead;
EVT_WDF_IO_QUEUE_IO_WRITE EvtIoWrite;
EVT_WDF_IO_QUEUE_IO_DEVICE_CONTROL EvtIoDeviceControl;
NTSTATUS
QueueCreate(
_In_ PDEVICE_CONTEXT DeviceContext
);
NTSTATUS
QueueProcessWriteBytes(
_In_ PQUEUE_CONTEXT QueueContext,
_In_reads_bytes_(Length)
PUCHAR Characters,
_In_ size_t Length
);
NTSTATUS
QueueProcessGetLineControl(
_In_ PQUEUE_CONTEXT QueueContext,
_In_ WDFREQUEST Request
);
NTSTATUS
QueueProcessSetLineControl(
_In_ PQUEUE_CONTEXT QueueContext,
_In_ WDFREQUEST Request
);
NTSTATUS
RequestCopyFromBuffer(
_In_ WDFREQUEST Request,
_In_ PVOID SourceBuffer,
_In_ size_t NumBytesToCopyFrom
);
NTSTATUS
RequestCopyToBuffer(
_In_ WDFREQUEST Request,
_In_ PVOID DestinationBuffer,
_In_ size_t NumBytesToCopyTo
);
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